Final report 2014-2018

  1. To create knowledge base of light-matter interactions dedicated to quantum phenomena and potential application for new sensors and metrology technologies, to develop optical magnetic and electric field sensors. 
  2. To develop new organic photonic materials and to make use of them by constructing prototype light emitting devices and photosensors.
  3. To develop an innovative microscopy and holography techniques for research and monitoring of micro-and nanoparticles and cell systems.
  4. To develop a new optical technology for large-field irradiation and for low photon flux detection systems, to develop and manufacture prototypes of precision optical devices.

No

Activity of the project

Description

Results

1.

Improvement of the theoretical model

The quantum mechanical description of Zeeman coherences in atoms and molecules will be improved and experimentally tested by improving the description of relaxation processes.

The quantum mechanical description of the Zeeman coherences model was essentially modified and improved by including the real power distribution of the laser beam profile in order to describe the transit relaxation appropriately. This solves the problem of description of the magneto-optical signal at large laser power densities, which could not be achieved previously.

The results are shown in the publication: [R2],

presented in conferences: [K11]

2.

Experimental testing of the model

Magneto-optical signals in alkali metal atom and dimer vapours will be experimentally studied and compared to the theoretical description.

The spatial dependence of nonlinear magnetooptical resonance signals within the cross section of the exciting laser beam profile has been determined. Scanning of the narrower probe laser beam across the wider beam profile of the second laser has been applied in Cs atomic vapour. The obtained signals have been compared with calculations performed in the developed model and a very good agreement has been achieved.

The results are shown in the publication: [R3]
presented in conferences: [K25],

PhD thesis defended: [T2]

3.

Development of magnetic field sensors

The quantum phenomena in NV centres in synthetic diamond crystals will be studied with a view to developing magnetic field sensors.

1) The magnetic field mapping system based on NV centres in synthetic diamonds was significantly improved using a fast Andor NEO 5.5 camera.

2) A new experiment was started and preliminary results obtained regarding the level-crossing signals of the NV centre ground state in a large magnetic field; theoretical modelling of the signal has been carried out.

3) The positions and transition strengths of hyperfine transitions in caesium atoms at large magnetic fields (up to 100 mT) were studied, with a view to applications to sensors in strong magnetic fields.

5) Spectral lines and structures related to magnetic interactions were studied in Nb I, Ho I and Ho II, which can be used as sensors to determine stellar parameters (elemental composition, nucleosynthesis type, age) in situ.

The results are presented in conferences: [K70,K71]

4.

Development of a method for magnetic field imaging

Sensors for the imaging of the spatial distribution of magnetic fields will be developed with potential applications for quality control of nanoparticles.

Based on anticross resonances studies, magnetic field resolution of ~ 10 nT Hz-1/2 reached without using microwaves.

Studies have been carried out on how to administer nanodimants containing nitrogen vacancies (NV) efficiently and smoothly to the AAO pore. AAO pore promotes surface polaritons, which reduce the lifetime of the excited state of NV centers, increase its fluorescence, thereby increasing the sensitivity of the magnetic field.

The results are shown in the publications: [R49, R50, R51],

presented in conference: [K97]

5.

Properties of oxygen molecules in SiO2 –type materials

Oxygen molecules are created in amorpohous SiO2 materials during synthesis or due to optical or ionizing irradiation. Their studies are essential for improvement of optical properties of these materials. On the other hand, lower electronically excited states of O2 have specific properties which are perspective in sensor applications or singlet-oxygen sources in biology applications.

Instrumentation system for high sensitivity measurements in photon-counting mode of near-infrared luminescence up to 1.35μ was upgraded and used for investigation of the properties of molecular oxygen in SiO2-based materials. The spectroscopic properties of SiO2 glass synthesized in oxygen plasma was studied and it was found that in parallel to interstitial O2, interstitial Cl2 molecules can be detected by near-infrared luminescence

6.

Ultraviolet optical losses in SiO2 materials

SiO2 is among the most important photonics materials for ultraviolet part of the spectrum. Despite the significant progress in this field, in a number of cases, particularly for optical fiber waveguides, the origins of the optical losses are not sufficiently clear. It is planned to study the origins of the optical losses in the 300 to 160 nm region and to find their creation processes by using spectroscopic methods.

UV absorption spectra of SiO2 glasses and optical fiber waveguides produced from this glass were studied. The main factors, which limit the optical transmissivity of these glasses and waveguides are silicon dangling bonds in 210 nm region, peroxide radicals in 230 nm region and oxygen dangling bonds in the 260 nm region. However the Raman scattering data indicate that in a number of synthetic SiO2 glasses part of the 260 nm absorption can originate from photoinduced reaction between oxygen and chlorine impurities.

7.

Chlorine impurities in SiO2- type materials

High-purity synthetic SiO2 materials are routinely produced from SiCl4 , additionally, Cl2 treatment is used for removing of silanol groups in synthesis of "dry" glasses. As a result, all so called "high purity" SiO2 glasses contain undesired Cl impurities. To enable theri quantification and detection, the forms of Cl embedding in SiO2 will be studied

Elaborated a high sensitivity method to detect molecular chlorine in SiO2 by its vibronically structured infrared luminescence at 1.27eV and lifetime 5.2ms at 13K. Proved high-stability of Cl2 in SiO2 against UV photolysis due to cage effect. By using Raman spectroscopy, discovered photochemical reaction of interstitial Cl2 with mobile atomic oxygen and formation of ClClO molecules

The results are shown in the publication: [R12]

presented in conferences: [K46, K47, K48]

8.

Optical properties of fluorine-doped SiO2 materials

Fluorine-doping is widely used to depress the refraction coefficient in optical fiber waveguides and to enhance the UV transparency of glassy SiO2. These properties are caused by fluorine in the form of Si-F groups/ However, part of the F can be embedded in different structural form, which can be detrimental to optical properties. These alternative configurations and their spectroscopic properties will be studied.

Silica glasses doped by fluorine in maximum concentrations, attainable by plasma outside deposition (up to 16 wt% F) were studied. In the vacuum ultraviolet region these glasses exhibited a significant shift of the fundamental absorption edge towards higher energies as compared to pure SiO2. However, the blue-shift does not increase significantly when F concentrations exceed 1 wt %. On electron irradiation of F-doped glass the dominant induced luminescence centres were NBOHC's.

9.

Properties of crystalline SiO2 polymorphs

The properties of amorphous SiO2,used in photonics, may understood by studying properties of the related crystalline forms of SiO2, including the high-pressure polymorphs, which have been so far insufficiently studied.

Investigation of the spectral characteristics of self-trapped excitons in coesite and quartz crystals has been done. The luminescence of self-trapped excitons is identified and correlated to self-trapped exciton luminescence in α-quartz. A mechanism of exciton self-trapping in coesite is proposed, comprising breakage of Si-O bond and forming of an additional bonding between the non-bridging oxygen and the neighbouring bridging oxygen.

Properties of autolocalized exciton in cristobalite were studied in comparison with properties of excitons in other crystalline SiO2 polymorphs. Self-trapped exciton luminescence was identified with peak around 600nm.

The results are shown in the publications: [R4, R18, R25], presented in conferences: [K1, K49]

10.

Infrared transmission measurements of optical fiber waveguides.

For a number of industrial and medical applications, optical fibers with a good stability in 2000nm region (Ho laser region) are required. For quantification of optical losses and identifications of their causes exact attenuation measurements in this region are needed

Experimental setups for studying infrared spectral properties of commercial optical fiber waveguides in the range up to 2.4 μ (absorption) and 1 μ (IR luminescence) were assembled using InGaAs photodiodes and Si CCDs as detectors. Labview-based software and stepper-motor drivers were developed.

11.

Vacuum UV transmission measurements of optical fiber waveguides.

For applications in analytic instrumentation optical fibers with good transmission in deep-UV and vacuum-UV regions are required. To perform such measurements, a modification of the standard vacuum-UV spectrometer is necessary.

Experimental setup, based on vacuum-monochromator, single tandem monochromators and CCD spectrometer was assembled. Test measurements of attenuation of fiber optic cables were performed.

12.

Manufacturing of light sources

High-frequency rlrctrode-less discharge lamps are widely used in analytical instrumentation for atom spectroscopy. Their lifespan is limited by the interaction active elements/ions with the material of the lamp envelope

Samples of high-frequency electrode-less spectral lamps, containing (Cd+Zn) and (Cd+Zn+SbJ) vapour and argon gas fillings were produced (5 samples each) and. Relative intensities of the emitted spectral lines were investigated. On the basis of these studies, a student bachelor paper was prepared

The results are presented in conferences: [K2,K3].

13.

Measurements of the intensities of emission lines of O atoms and measurements of the discharge temperatures

During the operation of electrode-less gas discharge lamps, oxygen from the lamp walls is emitted into the lamp active medium. It reacts with metal ions and the product deposits on walls, reducing the lamp intensity. Hence it is important to control the oxygen ion presence in the discharge and to determine the temperature of the medium as it controls the oxygen ejection.

Measurements of gas temperature and spectral line intensities of atomic oxygen in high-frequency electrode-less light sources showed that oxygen is emitted from the inner walls of SiO2 glass bulb. In the vicinity of inner surface it combines with hydrogen from the filling of lamp forming OH radical. Measurements support the hypothesis that oxygen is emitted from the surface due to plasma - surface interaction.

The results are presented in conferences: [K50]

14.

Synthesis and fluorescence studies of artificial diamonds

Artificial diamonds are used in sensor technologies. Laboratory scale synthesis methods will be elaborated and their fluorescence will be investigated.

Equipment was constructed for synthesis of diamond crystal coating on tungsten rod. Diamond samples were separated from the W substrate and separated from the amorphous carbon by using oxidizing agents. Transparent diamond particles were separated and analysed by optical microscopy.

The results are presented in conferences: [K66]

15.

Testing of electrode-less spectral light sources in heavy-metal absorption measurements

Detecting heavy metal contamination is of increasing importance. In view of the strategy of European commission on reduction of Hg contamination, the control of it is of high priority. Similarly control of contamination by elements As, Se, Tl,Bi, Pb, Zn, Cd, Sn etc, is important

Electrodeless high-frequency plasma discharge lamps serving as sources of atomic spectral lines for heavy-metal analysis were further developed and optimized. Their advantages as compared to the hollow-catrhode lamps were shown and the interaction of discharge plasma on lamp walls (oxygen desorption) was studied.

16.

Investigation of NLO properties of chromophores and organic materials synthesized within a frame of project.

Investigations will be carried out with aim to develop low molecular weight amorphous phase forming materials for high speed (>100GHz) EO modulators. On basis of gained knowledge of molecular structure impact on NLO light-matter interaction develop recommendations for futher design strategy.

New synthetic methods has been developed and new compounds NLO active compounds have been synthesized and their properties investigated.

A high amorphous phase stability, greatly enhanced by the presence of E/Z isomers or a racemic mixture of a novel 1,3-bis-(dicyanomethylidene)indane-5-carboxylic acid, was observed for these materials. NLO activity was successfully measured in poled amorphous films and the highest nonlinearity (d33(0) value of 6.2 pm/V) was measured for the compound where encapsulation of a D–p–A molecule with dipole shielding triphenylmethyl groups at both the donor and acceptor ends was employed. The controllable stereochemistry in the 1,3-bis-(dicyano-methylidene) indane-5-carboxylic acid based compounds may be potentially applied to acquire fine-tuned materials in NLO and other fields of photonic applications.

The results are shown in the publications: [R1, R7-R10], presented in conferences: [K65, K67]

PhD thesis defended: [T1]

17.

Investigations of Two Photon Absorbtion (TPA) and TP lumenescense properties of original (designed and synthesised in Latvia) chromophores.

Proposed to develop experimental setups and methodology for TPA (Z-scan) and TPL investigations. Investigations of original chromophores are planed by means of developed experimental fascilities.

Using the Z-scan method and quantum chemical modelling the third order nonlinear optical parameters of several aminobenziliden-1,3-indandione (ABI) derivatives which have previously shown to own second order nonlinear optical properties have been studied.

The results are shown in the publication:

Mg thesis defended: [M12], research methods developed: PM1, PM2

18.

Design, modelling, preparation and investigation of NLO active waveguide structures.

By combaining designed in Latvia organic NLO materials with „Silicon on insulator” (SOI) technology is proposed to built waveguide photonic devices like EO modulators, electricaly tunable wavelength filters and „all optical” light svitches.

Numerical modelling of a symmetric directional coupler (DC) and a Mach-Zehnder (MZ) switch with specific designs employing passive waveguide core and electro-optical (EO) cladding was done using three numerical methods, namely coupled mode theory, eigenmode expansion method and beam envelope method.

19.

Synthesis of new original organic chromophores and luminophores for photonic applications, development and investigation of thin solid films of organic glasses abnd polymers.

It is planned synthesis of: a) series of the alkyl derivatives of 2-cinnamoyl-1,3-indandione and the determination its spectroscopic, thermogravimetric, cyclic voltamperometry and film forming characteristics;

b) new electro-luminophores based on pyranilidene fragments containing molecular glasses or amorphous organometallic compounds;

c) molecular glasses for hole transport purposes will be investigated: to optimize carbazole N-mono alkylation with dibromobutane and formylation;

d) alkyl-linked carbazole containing ligands as intermediate products for different organometallic complexes;

e) new carbazole and cyano-acetic acid fragments containing pyranilidenes and develop a new synthetic method for triphenyl-alkyl groups containing carbazoles as molecular glasses for photonic applications.

Seven new 2-cinnamoyl-1,3-indandione (2CID) O-methyl ethers with different substituents (R = H, CH3, OCH3, N(C6H5)2, N(CH2CH2CN)2, julolidyl, N(CH3)2) in 4-position of the cinnamoyl moiety were synthesized. The methylation with dimethylsulfate occurred at the oxygen atom of the exocyclic enol group with high selectivity. The synthesized compounds were characterized by 1H, 13C NMR, IR, UVeVis and luminescence spectroscopy, their electrochemical properties were investigated by cyclic voltammetry. The obtained results indicates that introducing an electron donating substituents in the 4-position of cinnamoyl moiety facilitates electrochemical oxidation, remarkably shifts absorption and emission bands to longer wavelengths, simultaneously increases extinction coefficient (ε). O-methyl ethers with strong electron donating groups (N(C6H5)2, N(CH2CH2CN)2, julolidyl, N(CH3)2) in molecule are characterized by luminescence with maximum in range from 547 to 647 nm and absolute photoluminescence quantum yields from 0.02 to 0.32. Quantum yield (QY) of chromophore containing julolidyl fragment is solvent dependent. It was 0.32 in chloroform and decreased in other polar (ethanol, acetone) solvents.

Four new Europium(III) organic complexes containing 2-acetyldimedone (AD), 2-benzoyldimedone (BD) and 1,10-Phenantroline (Phen) where synthesized with the structures: Eu(AD)3(H2O)2, Eu(BD)3(H2O)2, Eu(AD)3Phen, Eu(BD)3Phen. Optical properties of all synthesized complexes were investigated in THF solutions by UV/Vis and photoluminescence spectroscopy. All complexes characterize decomposition temperatures (T5%) over 230 °C and intense UV absorption in the range from 210 to 340 nm. Photoluminescence spectra showed narrow, red light emission bands with multiple maximums in the 579-705 nm region, which can be attributed to the electron transition located on coordinated Eu(III) ion, indicating that in synthesized complexes an energy transfer from singlet excited state of ligands to central metal ion occurs. All complexes were also characterized with large Stokes shifts over 347 nm, but their photoluminescence quantum yields in THF solutions were low (<1%).

The results are shown in the publications: [R23, R29, R30, R43],
presented in conferences [K26, K27, K28, K29, K73, K74]
Mg thesis defended: [M7,M8, M9, M14]

20.

Development of graphene, reduced graphene oxide and funcionalized graphene films based on graphene oxide as intermediate product.

Studies of the synthetic method influence on structure and properties of graphene oxide (GO) and reduced graphene oxide (rGO) will be investigated.

It is planned to investigate the possibility to covalently attach pyranilidene fragment containing organic electro-luminophores to GO or rGO. Additionally, the interactions between carboxyl groups containing diazonium salts and GO and rGO under sonification will be examined and possible post-functionalization with alcohols and amines will be realized.

Development of methods for obtaining nanostructured thin films of graphene materials

Synthesized graphite oxide

(GO) in combination with carbon nanotubes (CNT) is used for the preparation of polyurethane (PU) composites. We fabricated composites with CNT/GO content of 0.05, 0.1, 0.3wt.%with the use of ultrasonic treatment and tested their thermo-mechanical properties.

Thermo-mechanical analysis (TMA) and dynamic mechanical analysis (DMA) measurements for CNT/GO composites were compared with the unfilled PU. Thermo-mechanical characteristics of storage moduli and loss moduli for CNT/GO nanocomposite were improved in comparison to the unfilled PU. The introduction of CNT/GO to the PU matrix creates strong bonding with the matrix and leads to the decrease of the glass transition temperature, new solid-solid phase transitions of polymer in the glass state. Dilatometric curves testified the remarkable changes in theglass transition of the polymer after the introduction of CNT/GO hybrid filler. Thermal expansion coefficient was calculated from the curve slopes and expressed continuously increasing expansion rate for CNT/GO composite. The measured characteristics were directly dependent from the filler content in the composite and the operated temperature.

The results are shown in the publications: [R24, R31, R44], presented in conferences: [K12, K13, K33, K34]

21.

Investigation of optical properties of organic molecules synthesised during the project in solution and thin films

Dependence of absorption and photoluminescence properties on molecule structure will be investigated

Phosphorescent emission in visible spectral region form investigated original metal complexes (synthesised within a frame of project) was observed. Obtained information is promising for using these materials to prepare high efficiency OLED prototype devices.

22.

Determination of energy levels of organic molecules

Quantum chemical calculation of organic compounds will be done to obtain energy levels of molecules. Calculated values and experimentally measured will be compared.

Investigations of ionization energy and morphology dependence on the thickness of two indandione group containing compounds was carried out. Two organic compounds with the same chromophore were studied: 2-(4-[N,N-dimethylamino]-benzylidene)-indene-1,3-dione (DMABI) and its derivative 2-(4-(bis(2-(trityloxy)ethyl)amino)benzylidene)-2H-indene-1,3-dione (DMABI-6Ph). DMABI-6Ph consists of two bulky groups which assist amorphous state formation in thin films. Two methods of the sample preparation were used depending on the organic compound properties: thermal evaporation for DMABI and spin-coating for DMABI-6Ph samples. In both cases was observed island like structure at small (below 50 nm) film thickness. Energy levels were determinate by photoemission yield spectroscopy and photoconductivity measurements. Influence of bottom electrode on compound energy level was observed.

The results are shown in the publications: [R5, R6, R26, R39]

presented in conferences: [K18, K19, K61]

Mg thesis defended: [M2, M3]

23.

Electrical properties of thin films

Dependence of charge carrier local trap states and mobility on organic thin film structure will be investigated

Current-voltage characteristics and charge carriers mobility of DMABI-dPh, DMABI-6Ph and DMABI-Si-6Ph was studied. Sandwich type samples with the structure ITO/organic compound/Au was prepared. Ohm law is fulfilled at low voltage values. At higher voltage current increase rapidly which is attributed to local trapping states.

Charge carrier mobility was measured for DMABI-6Ph and DMABI-Si-6Ph. It was not possible to measure carrier mobility for DMABI-dPh due to polycrystallinity of obtained films. Hole mobility of DMABI-6Ph and DMABI-Si-6Ph is between 10-7 and 10-8 cm2/Vs. There is no or small impact of glass forming groups (6Ph and Si-6Ph) on charge carrier mobility.

24.

Electroluminescence properties

Electroluminescence properties (spectrum, efficiency, brightness) will be determined

Electroluminescence properties for three compounds were investigated. Samples with the structure ITO/PEDOT:PSS/organic compound/BaF/Al were prepared. Parameters are measured for compounds EWK-1, EWK-2, MWK-1. The best performance obtained for system with EWK-1 as emitting layer: lmax = 629 nm, Uon = 11 V, brightness 97 cd/m2, efficiency 0.045 lm/W

25.

Investigation of light sensitivity of organic compounds

Solar cell parameters (spectral sensitivity, efficiency, fill factor) will be determined

The photophysical properties of DZTr, DZC-1, DZC-2 and DZC-3 compounds have been investigated during the project. Solar cells were prepared from the most promising compounds and its parameters were measured.

26.

Study of stimulated emission in organic compounds

Amplified spontaneous emission threshold value in planar waveguide will be measured for synthesised organic compounds

Host-guest systems with low threshold values were obtained.

The results are shown in the publication: [R38],
presented in conferences: [K20, K62, K63, K64]

Aizstāvēts maģistra darbs [M4]

27.

Development of organic laser

Organic laser will be built by using Brag grating

Thin films for the DWK-1TB connection were prepared and their optical properties were determined – absorption spectra and refractive index. From the obtained data, the Breg's grating constant was calculated. Optical scheme for recording Breg's grating was made. Based on which was realised organic solid state laser.

28.

Development of methodology for copolymer synthesis

Method for obtaining copolymers by varying the reaction conditions will be improved

Synthetic procedures for new derivatives and copolymers of benzanthrone were developed, thermal and spectral parameters of the prepared derivatives with pronounced luminescent properties were investigated.

The results are presented in conferences: [K69, K70]

29.

Investigation of copolymer thin films morphology

Thin film formation, surface relief and spectral parameters will be investigated

The results are shown in the publication: [R11],
presented in conferences: [K68]

30.

Development of thermally stable organic dyes

Thermo stability and luminescence properties of benzanthron derivatives will be studied

New synthetic procedure for the derivatives of benzanthrone was developed, physical properties of the prepared derivatives with pronounced luminescent properties were obtained and described.

The results are presented in conference: [K4]

Mg thesis defended: [M1]

31.

Analysis of relations of optical properties and crystallographic structure of organic compounds

Investigation of optical properties and crystallographic structure of organic compounds. Relations of structure/properties will be analysed

The results are presented in conferences: [K21,K22]

32.

Light convertor for visible spectral range (380-780 nm)

To build multilayer thin film photosensor on FTO covered glass substrate using dense TiO2 hole blocking layer; photoreceiver – organometalic lead halide perovskite and different “hole” polaron organic transport layers. To develop and optimaze technology of deposition of all necessary layers in order to obtain the highest possible short-circuit photocurrent external quantum efficiencies (EQE). Perform measurements of main photoelectric properties of cells, publishing results in scientific papers and conferences.

In the present work the fill factor (FF) dependencies from exiting light quantum energy has been investigated for the organometal perovskite CH3NH3PbI3-xClx solar cell for the first time as we have no knowledge that such experiments anywhere have been done ever before for such cell.

It was found that for cells with very high shunt resistance (Rshunt¬>109 Ω ) the FF increases from 0,58 at 760 nm up to 0,87 at 400 nm.

This phenomena at least partly can be explained by hot Wannier-Mott exciton participation in charge carrier photogeneration process in our cell – the higher is the exciting light quantum energy, the lower geminate recombination probability fot the exciton and following higher FF value we observe.

This hypothesis is supported by the experimental fact that for cells with lower Rshunt values we observe much weaker FF increase increasing exciting light quantum energy as it is seen in fig 1 (curve 2) for cell with Rshunt=105Ω). This cell also exhibited very large current-voltage curve hysteresis – showing larger trap concentration where recombination on traps exceeded geminate recombination.

The results are presented in conferences: [K78, K79, K80,

K94, K95, K96]

33.

Very sensitive photosensor for red and infrared spectral regions

To build planar heterojunction cells using lead phthalocyanine as electron donor and fullerene C60 as electron acceptor. By modification of charge blocking layers, achieve photoresponse values large than 10 A/W for weak light 1011-1013 phot/(cm2∙s) at spectral region around 880 nm and also shorter wavelengths up to 600 nm at 1V applied voltage to the cell. Perform measurement for photocurrent quantum efficiency spectral dependences in 380-1245 nm spectral range. Try to get physical explanation for this new phenomena of very high photoresponse for weak light.

Within this reporting period, we have performed invetigations with the aim to create photo sensor with high photosensitivity. Photo snsor is based on planar heterojunction between lead phthalocyanine with strong intermolecular charge transfer optical absorption band at 800 nm region (see fig. 2a) in triclinic modification and fullerene C60 as electron acceptor. MoO3 is used as hole transporting and electron and exciton blocking layer, but TCNQ as electron transporting and hole blocking layer. As top electrode, silver (Ag) has been used. Using such cell structure design a photo sensor with excellent photosensitivity has been worked out. This photo sensor when applied voltage is only 1V gives more than 200 electrons in external circuit per one incident photon at 700-900 nm region. Measured photocurrent response is more than 100 A/W at light intensity 1013 phot*cm-2*s-1

Development of low cost perovskite light converters using simplified technologies without using high temperatures (T<150C) was carried out during the reporting period. Multilayer planar heterojunction cell ITO/PEDOT:PSS/CH3NH3PbI3-xClx/PCBM/C60/BCP/Al was created. Short circuit current external quantum efficiency (EQE) higher than 80% for light intensities 1013 phot*cm-2*s-1) was achieved. Observed decrease of EQE (~50%) at higher (1015 phot*cm-2*s-1) light intensities could be explained by presence of traps at grain and layer boundaries increasing recombination losses at higher illumination levels

The results are presented in conferences: 1nferencēs [K14-K17, K35-K38]

Aizstāvēts maģistra darbs [M6]

34.

Photoinduced formation of surface relief in amorphous chalcogenides.

The dependence of surface relief formation efficiency in amorphous chalcogenides (As-S, As-Se and Ge-S,Se films) on recording laser wavelength, intensity and photoinduced birefringence.

Diffractive optical elements, particularly Bragg gratings have vide application in photonics. Possibility to write gratings with period les then 300 nm considerably widening application of them.The studies of photoinduced mass transport in amorphous As-S-Se thin films. The recording of surface relief gratings with a period of 150 -250 nm.

The results are shown in the publications: [R27, R41, R42], presented in conferences: [K5, K23]

35.

Photoinduced formation of surface relief in organic azobenzene containing compounds.

The dependence of surface relief formation efficiency in azobenzene-containing low-molecular-weight organic glasses on recording laser wavelength, intensity and photoinduced birefringence

The application of these materials as a photoresist for surface relief holographic recording has potential for application in production of diffractive optical elements. The studies of photoinduced mass transport in several original organic azocontaining compounds were carried out.

Transmission holographic gratings with the period of 2.0 μm have been recorded and read out by 532nm and 632.8 nm light. Self-diffraction efficiency (SDE) time dependences were recorded and the maximum SDE values have been determined as well as corresponding specific recording energies. The following non-azochromophore films were studied: DWK-2, KS-21, KS-24, KS-35, KS-39, KS-41, Ktb_2, EM-14, EM-15, EM-35, EM-36, EM-37,EM-38. Dendronized chromophore films LL50/50, LL75 and LL82 were studied as well. The best results were achieved in non-azochromophore films EM-14 (1.45% un 275 J/cm2% at 532 mm un 0.0085% at 632.8 nm) and EM-15 (1.64% and 566 J/cm2% at 532 nm and 0.51% at 632.8 nm). LL50/50 was the best among LL-type films (0.010% and 5.17 J/cm2% at 532 nm and 0.0030% and 11300 J/cm2% at 632.8 nm). The distinct peculiarity of all samples was a very fast (<1s), almost jump-like initial SDE increase, especially in the 532 nm case.

The results are shown in the publications: [R7, R19- R22, R28], presented in conferences: [K6-K10, K24, K76, K77]

Mg thesis defended: [M5]

36.

The mechanism and theory of photoinduced formation of surface relief structuries

Theoretical explanation of photoinduced formation processes of surface relief structures.

On the base of results obtained in the studies of photoinduced mass transport in inorganic amorphous chalcogenide (task nr.13) and organic azobenzene containing compounds (task nr.14), the conclusion that the key role in this process plays the photoinduced anisotropy. It was shown that the material photoinduced displacement rate and its direction regarding to illumination interference pattern depends on photoinduced anisotropy in material refractive index – sign (+ or -) and its value

The experimental setup is constructed allowing for the application of electric field with the intensity up to 17.3 kV/cm during the holographic grating recording and relaxation. Practically significant possibility to steer the holographic information recording by external electric field is based on electro-optic effects. If the frequency of light irradiation is close to the resonance frequency of a material, these effects can become observable. In both cases transmission holographic gratings with 2.0 μm period have been recorded by 632.8 nm He-Ne laser light. Recording beam polarizations were s-s, p-p, L-L and L-R . 17 kV/cm dc electric field was applied perpendicularly to the grating fringes at the distance of 0.2 mm from the film (ZWK-2TB, WE-3, ZWK-3, IWK-2D) surface. Recording time dependence of self-diffraction efficiency (SDE) was measured in each case. Electric field was also switched off and on during the exposure. No effect of electric field was found within experimental margin of 2% even with 17.3 kV/cm field.

The results are presented in conference: [K75]

37.

Prototype for recording of surface relief optical elements.

The formation of a device for recording of surface relief optical elements and optimization of its parameters.

Prototype setup at ISSP UL for production of diffractive optical elements created. System parameters optimized.

38.

Schmidt telescope (ST) modernization and development of spectral data analyse.

1. Calculations of the system of mirror and lens for Baldones Schmidt telescope (ST) optical channel.

2. Laboratory development of prototype for optical channel. Deployment and tests of the prototype on ST. Test observations, preliminary analysis of the data.

3. Methodology for observations with low and high spectral resolutions, by applying models of the model atmosphere corrections and synthetic spectrum methods.

Pub Schmidt Telescope optical channel enhancement principal scheme is calculated

Computer program for searching very red star (color indices [J-K]> 1.3 mag) in the 2 micron all sky survey 2MASS is created. The observation list of stars with color indices [J-K]> 1.3 mag. is obtained in sky area 50 deg. < δ < 90 deg. spectrum Reduction and classification of 192 late stars of objective prism are done. 11 newly carbon stars are dicovered in the Baldone observatory.

NEO and asteroids observations with the Baldone Schmidt telescope was carried out in 33 areas on the following dates- 05.08.2015 (7 asteroids are observed), 05.09.2015 (16) and 05.10.2015 (10). Orbital elements of 11 asteroids are calculated and specified. The orbital elements of 11 asteroids are compared with the Small Planet Center (MPC) database.

The results are shown in the publication: [R32],
presented in conferences [K81, K82, K83]

39.

Complementary SLR (optical range) and radar-VLBI (radio range, VLBI – Very Long Baseline Interferometry) observations

1. Radar VLBI and Satellite Laser Ranging (SLR) observations of transmitting geodetic satellites, (GPS and GLONASS), for training data needed in project activity 40

2. Triggered observations using VLBI, SLR and optical telescopes. The principle is rapid response for the nearby space changes (established e.g. by Schmidt telescope observations).

3. Near Earth asteroid observations using Schmidt telescope.

Part of project is related to reconstruction of Rt-16 and RT-32 radio telescopes. A newly installed NEO tracking software is tested by simulations and first RT-32 field tests. The upgraded telescope pointing system - engines, transmission, power electronics are studied and tested. A new in-home designed 1.6 GHz receiver for strong signal tests is installed on the RT-32, first satellite and observations are performed. Significant updates of time-keeping system, long-term stabilization of hydrogen maser clock by GPS signals is carried on.

The SLR system telescope main mirror was changed in October, 2015 (see Fig. 2). The coating of the previous mirror was oxidised and reflectance was only about 60% instead of nominal 88% at wavelength 532nm. The alignment of the telescope receiver channel was done as well. The efficiency of the receiver channel was evaluated using 532nm laser diode and laser power meter and also by stars in photon counting mode using PMT as a detector. Obtained results shows that receiver channel efficiency was increased from about 8% to 15%, approximately two times. The obtained results were confirmed by actual results from satellite laser ranging

40.

Development of matemathical methods for orbital determination of NEO, space debris and clouds of space debris.

1. Development of the radar VLBI cross-correlation methods, planar reference methods of measurement using several VLBI stations.

2. SLR and VLBI observation data processing with the aim to reconstruct/refine orbital elements of observed objects.

Within the frame of project a feasibility studies of Gabor frame and wavelet application to the radar VLBI data processing are carried out. In the stream of observed data critical regions, ones which can benefit from more sophisticated data processing techniques is identified. Work on application of different short-time Fourier transforms is carried on, statistics obtained. Algorithmic and software implementation of wavelet methods as well as related tests are ongoing efforts. Processing of already existing, unprocessed radar VLBI data is on scope of project - about 30 recorded data streams acquired during period 2005-2014 are processed.

PUBLISHED SCIENTIFIC PAPERS:

In journals with SNIP > 1

R1. E. Nitiss, A. Bundulis, A. Tokmakov, J. Busenbergs, E. Linina, M. Rutkis, Review and comparison of experimental techniques used for determination of thin film electrooptic coefficients, Phys. Status Solidi A, 1–13 (2015), DOI 10.1002/pssa.201532054

R2. M. Auzinsh, A. Berzins, R. Ferber, F. Gahbauer, U. Kalnins, L. Kalvans, R. Rundans, and D. Sarkisyan, Relaxation mechanisms affecting magneto-optical resonances in an extremely thin cell:Experiment and theory for the cesium D1 line, PHYSICAL REVIEW A 91, 023410 (2015), DOI: 10.1103/PhysRevA.91.023410

R3. M .Auzinsh, A. Berzins, R. Ferber, F. Gahbauer, L. Kalvans, A. Mozers, A. Spiss, Alignment-to-orientation conversion in a magnetic field at nonlinear excitation of the D2 line of rubidium: Experiment and theory, Phys. Rev. A, 91, 053418, 2015.

R4. A.N. Trukhin, K. Smits, J. Jansons, A. Kuzmin, Luminescence of polymorphous SiO2, Radiation Measurements, 90 (2016) 6-13, dx.doi.org/10.1016/j.radmeas.2015.12.002

R5. Kaspars Pudzs, Aivars Vembris, Raitis Grzibovskis, Janis Latvels, Elmars Zarins, Impact of the molecular structure of an indandione fragment containing azobenzene derivatives on the morphology and electrical properties of thin films, Materials Chemistry and Physics 173 (2016) pp 117-125, doi:10.1016/j.matchemphys.2016.01.046

R6. Raitis Grzibovskis, Aivars Vembris, Kaspars Pudzs, Relation between molecule ionization energy, film thickness and morphology of two indandione derivatives thin films, Journal of Physics and Chemistry of Solids 95 (2016) 12–18, dx.doi.org/10.1016/j.jpcs.2016.03.010

R7. Elmars Zarins, Andrejs Tokmakovs, Valdis Kokars, Andris Ozols, Peteris Augustovs, Martins Rutkis, Triphenyl group containing molecular glasses of azobenzene for photonic applications, Optical Materials 53 (2016) pp 146–154, dx.doi.org/10.1016/j.optmat.2016.01.044.

R8. Kaspars Traskovskis, Valdis Kokars, Andrejs Tokmakovs, Igors Mihailovs, Edgars Nitiss, Marina Petrova, Sergey Belyakov and Martins Rutkis, Stereoselective synthesis and properties of 1,3-bis(dicyanomethylidene)indane-5-carboxylic acid acceptor fragment containing nonlinear optical chromophores, Journal of Materials Chemistry C, 2016,4, 5019-5030, dx.doi.org/10.1039/C6TC00203J

R9. Dalius Gudeika, Vita Zilinskaite, Juozas V. Grazulevicius, Roman Lytvyn, Martins Rutkis, Andrey Tokmakov, 4-(Diethylamino)salicylaldehyde-based twin compounds as NLOactive materials, Dyes and Pigments 134 (2016) 244 – 250, dx.doi.org/10.1016/j.dyepig.2016.06.047

R10. Arturs Bundulis, Edgars Nitiss, Igors Mihailovs, Janis Busenbergs, and Martins Rutkis, Study of Structure–Third-Order Susceptibility Relation of Indandione Derivatives, J. Phys. Chem. C, 2016, 120 (48), pp 27515–27522, dx.doi.org/10.1021/acs.jpcc.6b07003

R11. Olga Ryzhova, Kateryna Vus, Valeriya Trusova, Elena Kirilova, Georgiy Kirilov, Galyna Gorbenko and Paavo Kinnunen, Novel benzanthrone probes for membrane and protein studies, Methods Appl. Fluoresc. 4 (2016) 034007, dx.doi.org/10.1088/2050-6120/4/3/034007

R12. L. Skuja, K. Kajihara, K. Smits, A. Silins, H. Hosono, Luminescence and Raman Detection of Molecular Cl2 and ClClO Molecules in Amorphous SiO2 Matrix, J. Phys. Chem. C, v.121 (9), pp 5261–5266 (2017), dx.doi.org/10.1021/acs.jpcc.6b13095

R13. A.N.Trukhin Luminescence of α-quartz crystal and silica glass under excitation of excimer lasers ArF (193 nm), KrF (248 nm). J. of Luminescence, v.188, 524-528 (2017)

R14. Trukhin, A.N., Antuzevics, A., Golant, K., Griscom, D.L. Luminescence of phosphorus doped silica glass JNCS Volume 462, 15 April 2017, Pages 10-16

R15. Gudeika, D., Bundulis, A., Mihailovs , I., Volyniuk, D., Rutkis, M., Grazulevicius, J.V. Donor and acceptor substituted triphenylamines exhibiting bipolar charge-transporting and NLO properties, Dyes and Pigments, Volume 140, 1 May 2017, Pages 431-44

R16. E. Nitiss, A. Tokmakovs, K. Pudzs, J. Busenbergs, M. Rutkis , All-organic electro-optic waveguide modulator comprising SU-8 and nonlinear optical polymer, Optics Express, Vol. 25, Issue 25, pp. 31036-31044 (2017)

R17. Raitis Grzibovskis, Aivars Vembris, Energy level determination in bulk heterojunction systems using photoemission yield spectroscopy: case of P3HT:PCBM, Journal of Materials Science Volume 53, Issue 10, pp 7506–7515, DOI: 10.1007/s10853-018-2050-9

In journals with SNIP < 1

R18. A.N. Trukhin, Luminescence of silicon dioxide different polymorph modification: Silica glass, α-quartz, stishovite, coesite, AIP Conference Proceedings 1624, 167 (2014); DOI: 10.1063/1.4900473

R19. K.Klismeta, J.Teteris, Recording of surface relief in azobenzene containing low molecular weight organic glasses, IOP CS MSE, 77 (2015) 012019.

R20. K.Klismeta, J.Teteris, The photoinduced birefringence and mass transport in azo compound K-D-2, Journ.Phys.: Conf.Ser., 619 (2015) 012027.

R21. A.Ozols, V.Kokars, P.Augustovs, D.Malinovskis, K.Traskovskis, E.Zarins, G.Ivanovs.Self-Enhancenment of Scalar and Vector Holographic Gratings in Azobenzene Molecular Glassy Films. Optics and Photonics Journal, 2014, vol.4, pp.143-152, DOI: 10.4236/opj.2014.46015.

R22. A.Ozols, A.Belyaev, V.Kokars, P.Augustovs, K.Traskovskis, D.Saharov .Recording and self-enhancement of dynamic polarization gratings in degenerate four-wave mixing geometry. Proc. SPIE, 9421, Eighth International Conference on Advanced Optical Materials and Devices (AOMD-8), 9421108-1 – 9421108-11 (22 October 2014); DOI: 10.1117/12.2084046.

R23. L. Laipniece, V. Kampars. Synthesis, thermal and light absorption properties of push-pull azochromophores substituted with dendronizing phenyl and perfluorophenyl fragments. Main Group Chemistry, 2015, 14, 43-58., DOI: 10.3233/MGC-140152

R24. A.Dravniece, L.Gerca, K.Kundzins, K.Teivena, V.Kampars, M.Rutkis. Optimization of Graphene Oxide Langmuir - Blodgett Thin Film Deposition. "Latvian Journal of Physics and Technical Sciences, 2014, N4, 61-68, DOI: 10.2478/lpts-2014-0025

R25. A N Trukhin, K Smits, J Jansons, G Chikvaidze, T I Dyuzheva and L M Lityagina, Luminescence of coesite, Physica Scripta, 90 (2015) 094009 (6pp) doi:10.1088/0031-8949/90/9/094009

R26. Kaspars Pudzs, Aivars Vembris, Raitis Grzibovskis, Janis Latvels, Elmars Zarins, Impact of the molecular structure of an indandione fragment containing azobenzene derivatives on the morphology and electrical properties of thin films, Materials Chemistry and Physics, doi:10.1016/j.matchemphys.2016.01.046

R27. L.Loghina, J.Teteris, M.Vlcek, Holographic recording of surface gratings in As40S60-xSex thin films, Proc.of 3rd International Conference on Photonics, Optics and Laser Technology, Berlin, Germany, 12-14 March, 2015, p.121-124.

R28. U.Gertners, J.Teteris, All-Optical Surface Micropatterning by Electric Field Intensity Gradient, Adv.in OptoElectronics, vol.2015, ID917029, 8 pages

R29. A.Ozols, P.Augustovs, K.Kenins, V.Kokars, E.Zarins, K.Traskovskis, D.Saharov. Dark relaxation of holographic gratings in azobenzene and chalcogenide films. IOP Conf. Series: Materials Science and Engineering, 2015, vol.77, 012018.doi:10.1088/1757-899X/77/1/012018.

R30. P.Augustovs, A.Ozols, E.Zarins, V.Kokars. Holographic photosensitivity intensity dependence of azobenzene molecular and chalcogenide glassy films. Advanced Materials Research, 2015, vol.1117, pp.90-93. doi: 10.4028/www.scientific.net/AMR.1117.90.

R31. V.Kampars, M.Legzdina. Thermal deoxygenation of graphite oxide at low Temperature. IOP Conf. Series: Materials Science and Engineering 77 (2015) 012033

R32. K. Cernis , I. Wlodarczyk and I. Eglitis – Observation data and orbits of the discovered asteroids at the Baldone Astronomical observatory in the years 2008–2013, Baltic Astronomy Vol 24, 2015, pp. 251-262.

R33. O.Danilenko, M.Ozolinsh, V.Karitans, P.Paulins. „SmartGlass” Obstacles for Dynamic Inducing of Light Scattering in Visual Research Experiments. Materials Science. Vol.22.,No4.,2016. (SNIP =0.3)

R34. P.Paulins, A.Krauze, M.Ozolinsh, A.Muiznieks (2016). Warming of Water. Phys. Edu. 51(2), 025013, dx.doi.org/10.1088/0031-9120/51/2/025013 (IPP 0.32 SNIP 0.96).

R35. M. Ozolinsh , K. Muizniece, J. Berzinsh , Chromostereopsis in "virtual reality" adapters with electrically-tuneable liquid lens oculars. Proc. SPIE 10021,1002109-1-7; (2016) dx.doi.org/10.1117/12.2247719 (IPP 0.26 SNIP = 0.25).

R36. M. Ozolinsh, O. Danilenko, and V. Zavjalova (2016). Retinal image quality and visual stimuli processing by simulation of partial eye cataract. Proc.SPIE 100244, 100244W-1-7; dx.doi.org/10.1117/12.2247721 (SNIP = 0.25)

R37. Varis Karitans. “Model Eye Incorporating a Manually Tunable Polymer Lens and Microfluidics Chamber for Simulation of Vitreous Floaters”. In Imaging and Applied Optics, OSA Tech.Digest.JT3A.1,2016. (OSA InfoBase) doi.org/10.1364/ISA.2016.IM3F.2

R38. Aivars Vembris, Elmars Zarinsh, Valdis Kokars, Amplified spontaneous emission of pyranyliden derivatives in PVK matrix, Proc. SPIE. 9895 (2016) 989509-1-7, dx.doi.org/10.1117/12.2227841

R39. Igors N Mihailovs, Valdis Kampars, Baiba Turovska and Martins Rutkis, Rational computing of energy levels for organic electronics: the case of 2-benzylidene-1,3-indandiones, RSC Advances, 2016, 6, 85242–85253, dx.doi.org/10.1039/C6RA16456K (SNIP= 0.81)

R40. Shivraj, Anup Thomas, E. M. Kirilova, I.Nikolajeva, B. Siddlingeshwar. 2016. Influence of Solvent Environment on Photophysical Properties of 3-(Piperidin-1-yl)-4H-benzo[de]anthracen-7(11bH)-one. Journal of Solution Chemistry, 45(10), 1391-1413. dx.doi.org/10.1007/s10953-016-0508-4

R41. Gertners, M.Reinfelde, J.Teteris, Light induced morphological processing of chalcogenide films, Journal of Optoelectronics and Advanced Materials, 18 (2016) 24-28. (SNIP=0.35) joam.inoe.ro/download.php

R42. M.Reinfelde, L.Loghina, Z.G.Ivanova, J.Teteris, U.Gertners, S. Slang, M. Vlcek, Photoinduced surface relief grating formation in amorphous As40S60-xSex thin films, Journal of Optoelectronics and Advanced Materials, 18 (2016) 1-4. (SNIP=0.35) joam.inoe.ro/download.php

R43. I.Malina, V.Kampars, M.Plotniece, B.Turovska. Synthesis, optical and electrochemical properties of substituted 2-cinnamoyl-1,3-indandione o-methyl ethers. Journal of Molecular Structure, 1115 (2016) 241-249 (SNIP= 0.81) dx.doi.org/10.1016/j.molstruc.2016.02.090

R44. S. Gaidukovs, V. Kampars, J. Bitenieks, I. Bochkov, G. Gaidukova, U. Cabulis, THERMO-MECHANICAL PROPERTIES OF POLYURETHANE MODIFIED WITH GRAPHITE OXIDE AND CARBON NANOTUBE PARTICLES. Integrated Ferroelectrics. Vol. 173 ,Iss. 1, 2016 (SNIP= 0.21) dx.doi.org/10.1080/10584587.2016.1182394

R45. L. Skuja, K. Kajihara, K. Smits, K.Alps, A. Silins, J. Teteris, Luminescence properties of chlorine molecules in glassy SiO2 and optical fibre waveguides, Proc. Estonian Acad. Sci, v.66 (4) pp. 455-461 (2017), doi: 10.3176/proc.2017.4.23

R46. A.Ozols, E.Letko, P.Augustovs, D.Saharov, E.Zarins, V.Kokars. Photoinduced anisotropy of IWK-2D azobenzene molecular glassy films. Key Engineering Materials, 2018, vol.762, pp. 233-238, doi:10.4028/www.scientific.net/KEM.762.233. ISSN: 1662-9795.

R47. Ivanova, A., Tokmakovs, A., Lebedeva, K., Roze, M., Kaulačs, I. Influence of the Preparation Method on Planar Perovskite CH3NH3PbI3-xClx Solar Cell Performance and Hysteresis. In: Latvian Journal of Physics and Technical Sciences. Riga: 2017, vol. 54, No 4, pp.58-68. ISSN 0868-8257. Available from: doi:10.1515/lpts-2017-0027

R48. A.Ivanova, K.Lebedeva, A.Tokmakov, M.Roze, I.Kaulachs. Charge transport layer doping influence on perovskite CH3NH3PbI3-xClx solar cell performance. Key Engineering Materials, Materials Science and Applied Chemistry, 2018, vol. 762, pp 249-254, ISSN:1662-9795; DOI: 10.4028/www.scientific.net/KEM.762.249

R49. Huijie Zheng, Georgios Chatzidrosos, Arne Wickenbrock, Lykourgos Bougas, Reinis Lazda, Andris Berzins, Florian Helmuth Gahbauer, Marcis Auzinsh, Ruvin Ferber, and Dmitry Budker, Level anti-crossing magnetometry with color centers in diamond, Proc. of SPIE Vol. 10119, 101190X doi: 10.1117/12.2261160

R50. U. Malinovskis, A. Berzins, F. H. Gahbauer, R. Ferber, D. Erts, and J. Prikulis, Fluorescent nanodiamond array deposition on porous anodizedaluminum oxide using asperity assisted capillary force assembly, Surface and Coatings Technology, 326 (2017) 264-269

R51. Uldis Malinovskis, Andris Berzins, Janis Smits, Florian H. Gahbauer, Ruvin Ferber, Donats Erts, and Juris Prikulis, Fluorescent nanodiamond array deposition on porous anodized aluminum oxide using asperity assisted capillary force assembly, Proceedings of the Estonian Academy of Sciences, 2017, 66, 4, doi.org/10.3176/proc.2017.3.01

R52. Al-Labady, N, Ozdalgic, B., Er, A., Guzelcimen, F., Ozturk, I. K., Kroeger, S., Kruzins, A., Tamanis, M., Ferber, R., Basar, Go., Line Identification of Atomic and Ionic Spectra of Holmium in the Near-UV. Part I. Spectrum of HoI, Astrophysical Journal Supplement Series, 228, 16, 2017.

R53. Basar, Go., Al-Labady, N., Ozdalgic, B., Guzelcimen, F., Er, A., Ozturk, I. K., Ak, T., Bilir, S., Tamanis, M., Ferber, R., Kroeger, S., Line Identification of Atomic and Ionic Spectra of Holmium in the Near-UV. II. Spectra of HoII and HoIII, Astrophysical Journal Supplement Series, 228, 17, 2017.

R54. E. Linina, A. Bundulis, E. Nitiss, M. Rutkis , Poling dynamics of an EO active material using parallel-plate electrodes, Proceedings of SPIE - The International Society for Optical Engineering, 10228, 1022816

R55. M. Reinfelde, M. Mitkova, T. Nichol, Z.G.Ivanova, J. Teteris, Photoinduced mass transport in Ge-Se amorphous films, Chalcogenide Letters, 15 (2018) 35-43.

R56. A. Gerbreders, M. Reinfelde, ABulanovs, A. Tokmakovs, K. Traskovskis, J. Teteris, Influence of acid-base modifiers on photoinduced mass transport in amorphous azobenzene amino acid, JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS, Vol. 20, No. 1 - 2, 2018, p. 52 – 55

SUBMITTED SCIENTIFIC PAPERS:

IR1. L.Skuja, N. Ollier, K.Kajihara Point defects in SiO2: from crystal to glass – electron and neutron irradiation effects. Prepared manuscript for J.Non-Crystalline Solids, 2018.

IR2. J. Mikelsone, J.Teteris, Surface relief grating recording in azobenzene epoxy films, Journal of Optoelectronics and Advanced Materials, 20 (2018), 5 pages.

IR3. J.Teteris, Surface relief grating recording in amorphous chalcogenide and azobenzene compounds, Journal of Optoelectronics and Advanced Materials, 20 (2018),7 pages.

CONFERENCE ABSTRACTS:

K1. A.N.Trukhin, K.Smits, J.Jansons, A.Kuzmin, Luminescence of polymorphous SiO2, BOOK OF ABSTRACTS 9thInternational Conference on Luminescent Detectors and Transformers of Ionizing Radiation LUMDETR 2015 Tartu, September 20 – 25, 2015, Mo-O-4

K2. I.D. Ivanova, V. Zhukova, E. M. M. Zinge ; Z. Gavare and E. Gosko, Spectroscopic studies of Tl containing high frequency electrodeless lamps, Proc. SPIE 9421, Eighth International Conference on Advanced Optical Materials and Devices (AOMD-8), 94210G (October 22, 2014); doi:10.1117/12.2083948

K3. Madara Zinge, Emils Gosko „Spectroscopic studies of cadmium high frequency electrodless light sources”, Abstracts of International Young Scientist Conference Developments in Optics and Communications 2015, Riga, Latvia, April 8-10, 2015, p. 50

K4. Kirilova, S V. Belyakov. Spectroscopic and Structural Study of New Benzanthrone 3-Aminophosphonates. Riga Technical University 55th International Scientific Conference, 2014

K5. L.Loghina, J.Teteris, M.Vlcek, Holographic recording of surface gratings in As40S60-xSex thin films, Proc.of 3rd International Conference on Photonics, Optics and Laser Technology, Berlin, Germany, 12-14 March, 2015, p.121-124.

K6. A.Ozols, P.Augustovs, K.Ķēniņš, V.Kokars, E.Zariņš, K.Traskovskis, Dm.Saharovs. Skalāru un vektoriālu režģu relaksācija azosavienojumu kārtiņās. LU CFI 30.zin.konf. tēzes, 2014.g. 19.-21.februāris, LU CFI, Rīga, 2014,54.lpp.

K7. A.Ozols, A.Belyaev, V.Kokars, P.Augustovs, K.Traskovskis, D.Saharov. Recording and self-enhancement of dynamic polarization gratings in degenerate four-wave –mixing geometry. Int.Conf.”Advanced Optical Materials and Devices, August 25-27, 2014, Riga, Latvia”. Book of Abstracts, Institute of Atomic Physics and Spectroscopy, Riga, 2014, p.18.

K8. P.Augustovs, A.Ozols, E.Zarins, V.Kokars. Holographic photosensitivity intensity dependence of azobenzene molecular glassy films. The 13th Int Conf. On Global Research and Education, September 10-12, 2014, Riga, Latvia. Digest, RTU, Riga, 2014, p.65.

K9. A.Ozols, P.Augustovs, K.Kenins, V.Kokars, E.Zarins, K.Traskovskis, D.Saharov. Dark relaxation of holographic gratings in azobenzene and chalcogenide films.Joint 12th Russia/CIS/Baltic/Japan Symposium on Ferroelectricity and 9th Int.Conf. Functional Materials and Nanotechnologies, Institute of Solid State Physics, University of Latvia, September 29-October 2, 2014, Riga, Latvia, p.257.

K10. A.Ozols, P.Augustovs, P.Studens, E.Zarins, V.Kokars. Coherent self-enhancement of dynamic gratings in W-75 molecular glassy films. RTU 55th Int.Scientific Conf. Section: Material Science and Applied Chemistry, October 14-17, 2014, Riga, Latvia. Abstracts, RTU Press, Riga,2014, p.49.

K11. Ferbers 1 (LU akadēmiskā konference)

K12. 1.K.Teivena, V.Kampars. Thermal Reduction of Intercalated Graphite Oxide. Book of abstracts of 55. International scientific conference of RTU, 2014, 11

K13. 2.V.Kampars, M.Legzdina.Thermal Deoxygenation of Graphite Oxide at Low Temperature. Book of abstracts of the joint symposium RCBJSF - 2014 – FM&NT, 2014, 371

K14. I.Kaulachs, A.Ivanova, G.Shlihta, J.Grabis, P.Shipkovs, M.Roze, K.Pudzhs, J.Kalnachs. Sequentially deposited perovskite solar cell employing CH3NH3PbI3-xClx light absorber, RCBJSF FM&NT (12th Russia/CIS/Baltic/Japan Symposium on Ferroelectricity and 9th International Conference Functional Materials and Nanotechnologies, 2014, September 29- October 2, Riga, Book of Abstracts p. 399.

K15. A.Ivanova, I.Kaulachs, G.Shlihta, J.Grabis, M.Roze, K.Pudzhs, A.Tokmakov, P.Shipkovs. Planar Heterojunction Perovskite (CH3NH3PbI3-xClx ) Solar Cell Via Vapor-Assisted Deposition, Riga Technical University 55th International Scientific Conference, 2014, October 14-17, Riga, Book of Abstracts p. 32.

K16. RTU studentu zinātniskā konference: A.Ivanova. Planāro heteropāreju perovskīta saules elementu galveno elektrisko parametru spektrālās atkarības, 2015. gada 23. aprīlis, Rīga.

K17. A.Ivanova, I.Kaulachs, G.Shlihta, P.Shipkovs, M.Roze, A.Tokmakov, A.Flerovs, A.Holsts. Planar heterojunction perovskite CH3NH3PbI3-xClx solar cell. EuroNanoForum, 2015, June 10-12, Riga, abstract 1A-16.

K18. Julija Pervenecka, Raitis Grzibovskis, Aivars Vembris, Optical and photoelectrical properties of DMABI chromophore consisting molecules, 11th International Young Scientist conference “Developments in Optics and Communications 2015”, Riga, Latvia, April 8–10, 2015, Book of Abstracts p. 47Ds

K19. R.Grzibovskis, A.Vembris, K.Pudzs, Divu indandiona atvasinājumu molekulu jonizācijas enerģijas atkarība no kārtiņas biezuma un morfoloģijas (Molecule ionization energy dependence on film thickness and morphology of two indandione derivatives), Rīgas Tehniskās universitātes 56. Starptautiskā zinātniskā konference, 2015.gada 14.-16. oktobris, Rīga, 2015, 32.lpp

K20. M. Narels, A. Vembris , Amplified spontaneous emission of DCM derivative in PVK thin film, 11th International Young Scientist conference “Developments in Optics and Communications 2015”, Riga, Latvia, April 8–10, 2015, Book of Abstracts p. 18

K21. A.Petrovs, I. Ivanova, E. M. Kirilova. Study on n-alkylation and n-acylation reactions on 3-aminoderivatives of benzanthrone. Abstracts of the 57th International Scientific Conference of Daugavpils University, 2015

K22. E. M. Kirilova, I. D. Ivanova, G. K. Kirilov. Optical Properties of 3-Substituted Benzanthrone Dyes in Solutions, Crystals and Polymer Films. Riga Technical University 56th International Scientific Conference, 2015

K23. J.Teteris, Optical field induced mass transport in amorphous materials, 7th International Conference on Amorphous and Nanostructured Chalcogenides, July5-10, 2015, Cluj-Napoca, Romania.

K24. U.Gertners, J.Teteris, All-optical surface micro-patterning by electric field intensity gradient, The 5th International school and conference on photonics (Photonica2015), 24-28 August, 2015, Belgrade, Serbia. Book of Abstracts, p. 216.

K25. M. Auzinsh, A. Berzins, R. Ferber, F. Gahbauer, U. Kalnins, Analysis of the spatial dependence of laser-induced fluorescence for alkali metal vapours in an intense laser beam, EGAS–47th conference of the European Group of Atomic Systems, Riga. Latvia,14-17 July, 2015, Book of Abstracts, p.83.

K26. L.Laipniece, V.Kampars. Synthesis of dendronized azobenzene 2,3,4,5,6-pentafluorobenzyl ether. Book of abstracts of 56. International scientific conference of RTU, 2015, 18

K27. I.Neibolte, V.Kampars. Synthesis and Optical Properties of Novel Luminophores Bearing Cyclic ,’-triketones. Book of abstracts of 56. International scientific conference of RTU, 2015, 17

K28. A.Ozols, P.Augustovs,D.Saharovs, E.Zariņš, V.Kokars. Atstarošanās režģi molekulāro stiklu kārtiņās. LU CFI 31.zinātniskās konf. tēzes, 2015.gada 24.-26.februāris, LU CFI, Rīga, 2015, 44.lpp.

K29. A.Ozols, P.Augustovs, P.Studens, E.Zarins, V.Kokars. Coherent self-enhancement of dynamic polarization gratings in W-75 molecular glassy azobenzene films. Proc. of Int.Conf." Northern Optics & Photonics 2015, June 2-4, 2015, Lappeenranta, Finland". Editors T.Setala, A.T.Friberg, J.Saarinen, J.Tervo, p.36.

K30. V.Kokars, K.Siltane, E.Zarins, A.Ozols, P.Augustovs, A.Vembris. Synthesis and holographic properties of alkyl 2-cyanoacetate acceptor fragment containing push-pull type organic glasses. 8th Int. Symposium on Flexible Organic Electronics, 6-9 July, 2015, Thessaloniki, Greece. Book of Abstracts, p.130.

K31. P.Augustovs, A.Ozols, E.Zarins, V.Kokars. Holographic photosensitivity of azobenzene molecular and chalcogenide glassy films. 8th Int. Symposium on Flexible Organic Electronics, 6-9 July, 2015, Thessaloniki, Greece. Book of Abstracts, p.37.

K32. A.Ozols, P.Augustovs, Dm. Saharov, E.Zarins, V.Kokars. Diffraction efficiency of reflection gratings in azobenzene films. Riga Technical University 56th Int. Scientific Conf.Section: Materials Science and Applied Chemistry, October 14-16, 2015, Riga, Latvia. RTU Press, Riga 2015, p.47

K33. S. Gaidukovs, V. Kampars, J. Bitenieks, I. Bochkov, G. Gaidukova, U. Cabulis. Thermal and Thermo-Mechanical Properties of Polyurethane Modified With Graphite Oxide and Carbon Nanotube Nanoparticles, FM&NT-2015, Abstract book, Vilnius, 2015, 9

K34. V.Kampars, I.Svidovska, E.Palitis, A.Mishnev. Graphene oxide derivatization with amines. Book of abstracts of 56. International scientific conference of RTU, 2015, 36

K35. A.Ivanova, I.Kaulachs, G.Shlihta, P.Shipkovs, M.Roze, A.Tokmakov, A.Flerovs, A.Holsts. Planar heterojunction perovskite CH3NH3PbI3-xClx solar cell. EuroNanoForum, 2015, June 10-12, Riga, abstract 1A-16.

K36. I.Kaulachs, A.Ivanova, G.Shlihta, A.Tokmakov, A.Holsts. Spectral dependencies of main electric parameters for CH3NH3PbI3-xClx perovskite solar cell grown by interdiffusion of stacking layers. PSCO, 2015, September 27-29, Lausanne, Book of abstracts p-57

K37. I.Kaulachs, A.Ivanova, G.Shlihta, J.Grabis, M.Roze, P.Shipkovs, A.Tokmakov, A.Holsts. CH3NH3PbI3-xClx perovskite solar cell grown by interdiffusion of stacking layers. FM&NT, 2015, October 5-8, Vilnius, abstract book p.125.

K38. A.Ivanova, I.Kaulachs, G.Shllihta, P.Shipkovs, M.Roze, A.Tokmakov. Spectral dependencies of fill factor and VOC for CH3NH3PbI3-xClx perovskite solar cell. RTU 56th International Scientific Conference, 2015, October 14-16, Riga, Latvia, book of abstracts p.22

K39. Eglitis, I., Baldone Astrophysical observatory: Upgrade, progress and results in observation and research, conference Achievments and Future Prospects, Riga, 23-24 April, p. 29, 2015

K40. Salmins, K., del Pino, J., The capacity of upgraded SLR LS-105 system station (ILRS code name1884 Riga0. Results of observation and research, conference Achievments and Future Prospects, Riga, 23-24 April, p. 30-31, 2015

K41. Abele, M., Rutkovska, E., Vjaters, J., Treis, A., Design of multipurpose instrument forranging of satellites and space debris and for remote sensing in atmosphere, conference Achievments and Future Prospects, Riga, 23-24 April, p. 32, 2015

K42. del Pino, J.R., Salmins, K., Abele, M., Meijers, A., Lyubych, I., Horelnykov, S., Zhaborovskyy V., New calibration for the Riga SLR station, 73rd Annual conference of the University of Latvia, Riga, 6 February, p. 24, 2015

K43. Salmins, K., del Pino, J., Hoffman, E., Modernization of SLR station Riga and future prospects, 73rd Annual conference of the University of Latvia, Riga, 6 February, p. 31, 2015

K44. Treis, A., Vjaters, J., Abele, M., Rutkovska, E., Development of laser beams coaxical direction active stabilization on interoperable remote platforms, 73rd Annual conference of the University of Latvia, Riga, 6 February, p. 54, 2015

K45. Salmins, K., Horenukov, S., Liubich, I., Medvedsky, M., Melkov, S., Zhaborovsky, V., Scientific collaboration with Ukainian SLR network, 73rd Annual conference of the University of Latvia, Riga, 6 February, p. 61, 2015

K46. L.Skuja, Effect of interstitial gas molecules on performance of optical devices made from high purity glassy SiO2, International Workshop “LIGHTtalks: Power of Photonics” April 25, 2016, Riga, LATVIA, Book of Abstracts, p.11.

K47. L.Skuja, K.Kajihara, K. Šmits, H.Hosono Interstitial Chlorine Molecules in SiO2 Glass, International symposium on SiO2, Advanced dielectrics and related devices, Nice , June 13-15, 2016. Abstracts, p. 89-90. (sciencesconf.org:sio2-2016:101362)

K48. Linards Skuja, Koichi Kajihara, Krišjānis Šmits, Andrejs Siliņš, Hideo Hosono, Starpmezglu skābekļa un hlora piemaisījumu detektēšana amorfā SiO2 ar luminiscences metodēm, tēzes, 102.lpp. LU CFI 32. zin. konference 2016.g. 17.-19. februāris.

K49. A.N.Trukhin, A.Antuzevičs, K.M.Golant, D.L. Griscom Luminescence of Phosphorus Doped Silica Glasses , Abstracts, p. 93-94 (ciencesconf.org:sio2-2016:97199)

K50. Z. Gavare, M. Zinge, E. Bogans, A. Skudra, Analysis of gas temperature and oxygen emission in high frequency electrodeless light sources, In abstracts of 8th Nordic Conference on Plasma Spectrochemistry (Nordic Plasma 2016), June 5 - 8, 2016, Loen, Norway, p. 107.

K51. O. Danilenko, M. Ozolinsh, V. Karitans, V. Zavjalova. “The compound mechanism of adaptation to high contrast, Int. Conf. Developments in Optics and Communications DOC-2016, Riga March21-23, 2016. Abstr. p.32.

K52. S. Fomins, J. Kleperis, M. Ozolinsh, “Seasonal environmental spectrophotometry” Int. Conf. Developments in Optics and Communications DOC-2016, Riga March21-23, 2016. Abstr. p.37.

K53. V. Karitans, J. Logina, G. Krumina, “Manually tunable lens based eye model,” Int. Conf. Developments in Optics and Communications DOC-2016, Riga March21-23, 2016. Abstr. p.36.

K54. K. Muižniece, M. Ozolinsh „Simultaneous presence of stereodisparity and chromostereopsis observing “Virtual Reality” images”, Abstr.Int. Conf. Advanced Materials and Technologies,AMT-2016, Palanga, 2016, p.71.

K55. O. Danilenko, M. Ozolinsh, V. Zavjalova, „Binocular summation model of colour images in respect to previous adaptation,” Internat. Symp.„Seeing Colors-2016”, Regensburg Sept. 19-21,2016, Abstracts, p.26.

K56. Sergejs Fomins, Ieva Jekabsone, Maris Ozolinsh, „Background luminance effect on image,” ,” Internat. Symp.„Seeing Colors-2016”, Regensburg Sept. 19-21,2016, Abstracts, p.29.

K57. O. Danilenko, M. Ozolinsh, V. Zavjalova, „Perceptual adaptation studies at simulation of unilateral cataract visual contrast decrease,” Proc. of 8th European Meeting on Visual and Physiological Optics VPO-2016, August 22-24 2-016 Antverpen, pp.223-225.

K58. M. Ozolinsh, K. Muizniece, J. Berzinsh, „Chromostereopsis in “Virtual Reality” adapters with electrically tuneable liquid lens oculars,” Abstr.Internat. Conf. SPIE Photonics Asia, Beijing, 2016, October 12-14, Beijing; Paper 10021-6 (http://spie.org/PA/conferencedetails/optical-design-and-testing)

K59. Maris Ozolinsh, Olga Danilenko„Retinal image quality and visual stimuli processing by simulation of partial eye cataract,”, ,” Abstr.Internat. Conf. SPIE Photonics Asia, Beijing, 2016, October 12-14, Beijing; Paper 10024-181

K60. V. Karitans Model Eye Incorporating a Manually Tunable Polymer Lens and Microfluidics Chamber for Simulation of Vitreous Floaters, Proc. Conf. “Imaging Systems and Applications”, Heidelberg, Germany, July 25-28, paper IM3F.2, doi.org/10.1364/ISA.2016.IM3F.2

K61. Raitis Gržibovskis, Aivars Vembris, Robežvirsmas starp divām organiskajām vielām pētīšana ar fotoemisijas kvantu iznākuma spektroskopijas metodi, LU CFI 32. zinātniskā konference, Rīga, 2016. gada 17.-19. Februāris, Tēzes, 27.lpp.

K62. Aivars Vembris, DWK-1TB molekulu optiskās un pastiprinātas spontānās emisijas īpašības polimēra matricā, (Optical and amplified spontaneous emission properties of DWK-1TB molecules in polymer matrix) LU CFI 32. zinātniskā konference, Rīga, 2016.gada 17.-19.februāris, Tēzes, 25.lpp.

K63. Jūlija Perveņecka, Aivars Vembris, Edgars Nitišs, Elza Liniņa, Mikrostruktūras veidošana piramilidēna atvasinājumu saturošās SU-8 kārtiņās, LU CFI 32. zinātniskā konference, Rīga, 2016. gada 17.-19. Februāris, Tēzes, 26.lpp.

K64. Julija Pervenecka, Aivars Vembris, Edgars Nitiss, Elza Linina Preparation of microstructure and amplified spontaneous emission in piraniliden derivative containing su-8 films, 12th International young scientist conference “Developments in Optics and Communications”, Riga, March 21-23, Book of Abstracts p. 7

K65. A. Bundulis, E. Nitišs, J. Busenbergs, M. Rutkis, “Z-scan” metodes ieviešana nelineāri optisko materiālu divfotonu absorbcijas un optiskā Kerra koeficientu noteikšanai, Latvijas Universitātes Cietvielu fizikas institūta 32. zinātniskā konference, Rīga, Latvija, Februāris 17–19, 2016, 31 lapa

K66. Ē. Elksnis, A. Vīksna, A. Skudra, Diamond synthesis using plasma chemical vapour deposition method with different hydrocarbon precursors, Latvijas Universitātes Cietvielu fizikas institūta 32. zinātniskā konference, Rīga, Latvija, Februāris 17–19, 2016, 121 lapa

K67. A. Bundulis, E. Nitiss, J. Busenbergs, M. Rutkis, Determination of two-photon absorption and Kerr effect of organic materials by z-scan method, Developments in Optics and Communications 2016, Rīga, Latvija, Marts 21-23, 10 lapa.

K68. E.M. Kirilova, I. D. Ivanova, A. Zaichenko, S. V. Belyakov. Synthesis of novel fluorescent dyes based on benzanthrone chromophore. BOS2016, International Conference in Organic Synthesis, Riga, Latvia, 3-6 July, 2016, PO55.

K69. E. Romanovska. Reduction of aromatic nitro compouds and properties of obtained compounds. The 58th INTERNATIONAL SCIENTIFIC CONFERENCE OF DAUGAVPILS UNIVERSITY, Daugavpils, Latvia, 14-15 April, 2016, p.41.

K70. T. Grigorjeva, A. Volkova, I. Nikolaeva, E. Kirilova. Methods for synthesis of luminescent copolymers. The 58th INTERNATIONAL SCIENTIFIC CONFERENCE OF DAUGAVPILS UNIVERSITY, Daugavpils, Latvia, 14-15 April, 2016, p.40.

K71. A. Jarmola, A. Berzins, J. Smits, K. Smits, J. Prikulis, F. Gahbauer, R. Ferber, D. Erts, M. Auzins, D. Budker, K. Vaicekonis, Electron spin-relaxation in nitrogen-vacancy centers in diamond lattice, Development in Optics and Communications 2016 (DOC 2016), 21-23 March, 2016.

K72. Andris Erglis, Marcis Auzinsh, Andris Berzins, Ruvin Ferber, Janis Smits, Paschen-Back Effect and Transition Probabilities at Fields up to 7 kG in Caesium Atoms, 12th European Conference on Atoms, Molecules, and Photons (ECAMP 12), Frankfurt am Main, Germany, September 5-9, 2016.

K73. I.Malina, V.Kampars. Synthesis and Optical Properties of Red Light Emitting Europium(III) Complexes Containing 2-Acyldimedone and Phenantroline ligands. Proceedings of Riga Technical University 57th International Scientific Conference, MSAC, 2016, 117-121

K74. I.Malina, V.Kampars. 2-Acildimedona un fenantrolīna līgandus saturošu sarkanās gaismas emitējošu Eu(III) kompleksu sintēze un optiskās īpašības. RTU 57.starptautiskās zinātniskās konferences tēzes, programma 47.lpp.

K75. A.Ozols, P.Augustovs, E.Zariņš, V.Kokars. Elektriskā un magnētiskā lauka ietekmes izpēte uz hologrāfisko ierakstu azosavienojumu molekulārajās kārtiņās. LU CFI 32.zinātniskās konferences tēzes, 2016.gada 17.-19.februāris, LU CFI, Rīga, 2016, 22.lpp.

K76. L.Laipniece, V.Kampars, A.Ozols, P.Augustovs. Dendronizētu hromoforu sintēze un hologrāfiskais ieraksts hromoforus saturošā paraugā. LU CFI 32.zinātniskās konferences tēzes, 2016.gada 17.-19.februāris, LU CFI, Rīga, 2016, 120.lpp.

K77. A.Ozols, P.Augustovs, S.Goldberga. Effect of Light Polarization on the Hologram Readout in an a-As-S-Se Film. Proceedings of Materials Science&Applied Chemistry, MSAC 2016, pp.135-138.

K78. A.Ivanova, I.Kaulachs, G.Shlihta, M.Roze, J.Grabis, L.Rozenberga-Voska, A.Tokmakovs. Inverted CH3NH3PbI3-xClx solar cell by low temperature technology. LU Cietvielu fizikas institūta 32. zinātniskā conference, 17.-19. February, Riga, 2016, book of abstracts p.58 (Inversais CH3NH3PbI3-xClx saules elements, kas izgatavots ar zemo temperatūru tehnoloģiju).

K79. I.Kaulachs, A.Ivanova, G.Shlihta,A.Tokmakov. Spectral dependencies of the fill factor for a CH3NH3PbI3-xClx perovskite solar cell. ICEPOM10, 2016, May 23-27, Ternopil, Ukraine, book of abstracts p. 76

K80. A.Ivanova, I.Kaulachs, M.Roze. Inverted planar heterojunction perovskite (CH3NH3PbI3-xClx) solar cell, RTU 57th International Scientific Conference, 2016, October 21, Riga, Latvia

K81. Eglite M., Eglitis I., Protsyuk Yu.I., et al.Asteroids from digitized processing of photographic observations in Baldone. 2016,Book of Abstr. "AstroPlate", Prague, March 14- 18, 2016,p.41. www.mao.kiev.ua/biblio/jscans/discrete/AstroPlate-2016_020.jpg

K82. Eglite M., Eglitis I., Kovylianska O.E., et al.Astrometric and photometric processing of Pluto digitized photographic observations during 1961 to 1996. 2016,Book of Abstr. "AstroPlate", Prague, March 14- 18, 2016,p.40. www.mao.kiev.ua/biblio/jscans/discrete/AstroPlate-2016_020.jpg

K83. Eglite M., Eglitis I., Shatokhina S.V., et al.Obtaining positions of asteroids from digitized processing of photographic observations in Baldone observatory (code 069). 2016,16-th Odessa Int. Astron. Gamow Conf.- School "Astronomy and beyond: Astrophysics, Cosmology and Gravitation, Cosmomicrophysics, Radioastronomy and Astrobiology", Odessa, Chernomorka, Aug.14- 20, 2016: Abstracts,p.25

K84. L.Skuja "The role of interstitial molecules in radiation processes in SiO2."– Invited seminar at Laboratoire des Solides Irradiés, Ecole Politechnique Palaiseau, France, Oct. 17. 2016 portail.polytechnique.edu/lsi/fr/seminaire-invite-de-linards-skuja.

K85. Linards Skuja, Koichi Kajihara, Krišjānis Šmits, Andrejs Siliņš, Hideo Hosono, Starpmezglu hlora un dihlora monoksīda molekulu stiklveida SiO2 Ramana izkliedes pētījumi, LU CFI 33. zin. konference 2017.g. 22.-24. februāris, tēzes, 89.lpp.

K86. L.Skuja, K.Kajihara, J.Grube, H.Hosono, Photoluminescence of oxygen dangling bonds in crystalline SiO2, 64th Spring meeting of Japan Society for Applied Physics (JSAP), March 14-17 2017, Yokohama, Japan

K87. L. Skuja, K. Kajihara, K.Smits, A. Silins, J.Teteris, Luminescence properties of chlorine molecules in glassy SiO2 and optical fiber waveguides, International Conference FMNT-2017 Tartu, Estonia April 24-27, 2017 (Proceedings, p.19 paper P-100.

K88. L.Skuja, N. Ollier, K.Kajihara, Comparison between the optical properties of defects induced by 2.5 MeV electrons and by neutrons in crystalline and amorphous SiO2, 19th International conference on Radiation Effects in Insulators, REI-19, Versailles, France, July 2-7, 2017, Proceedings, p.273-274.

K89. Z. Gavare, M. Zinge, A. Skudra, E. Bogans, Electron temperature determination of bismuth containing electrodeless light sources during self-modulation regime, 17th International Conference on Plasma Physics and Applications (CPPA 2017), June 15 – 20, Magurele, Romania, 2017, Abstracts p. 77.

K90. M. Zinge, Z. Gavare, A. Fridmane, Spectroscopic studies of bismuth containing high frequency electrodeless light sources, International conference on Developments in Optics and Communications (DOC 2017), Riga, Latvia, April 6-7, 2017, Abstracts p.45.

K91. P.Augustovs, A.Ozols, V.Kokars, E.Zariņš, K.Traskovskis, V.Kampars, L.Laipniece. Hologrāfiskā vektorieraksta īpatnības ar cirkulāri polarizētiem stariem dažāda tipa molekulāro stiklu kārtiņās. LU CFI 33. zinātn. konferences, veltītas Organisko materiālu laboratorijas izveidošanas 50.gadadienai, tēzes, 2017.gada 22.-24.februāris, LU CFI, Rīga, 2017, 91.lpp.

K92. A.Ozols, P.Augustovs, E.Zarins, V.Kokars. Electric and magnetic field studies on the holographic recording in organic materials.Int.conf. "Functional Materials and Nanotechnologies 2017, Tartu, Estonia, April 24-27, 2017, p. OR-12.

K93. A.Ozols, P.Augustovs, Dm. Saharovs, E.Zariņš, V.Kokars. Skalāru hologrāfisko režģu vektorieraksts molekulāro stiklu kārtiņās. LU CFI 34. zinātn. konferences, veltītas LU CFI 40.gadadienai un Segnetoelektriķu un pjezoelektriķu laboratorijas 50.gadadienai, tēzes, 2018.gada 20-22.februāris, LU CFI, Rīga, 16.lpp.

K94. A.Ivanova, I.Kaulachs, M.Roze, A.Tokmakovs, A.Holsts. Influence of top electrode thickness on metalorganic perovskite solar cell degradation. LU Cietvielu fizikas institūta 33. zinātniskā konference, 22-24. February, Riga, 2017, book of abstracts p.106 (Augšējā elektroda biezuma ietekme uz metālorganisko perovskīta saules elementu degradāciju).

K95. I.Kaulachs, A.Ivanova, M.Roze, A.Tokmakov, K.Lebedeva. Planar perovskīta CH3NH3PbI3-xClx solar cells with different transports layers. FM&NT, 2017, April 24-27, Tartu, Estonia, abstract book p.103.

K96. A.Ivanova, K.Lebedeva, A.Tokmakov, M.Roze, I.Kaulachs. Perovskite CH3NH3PbI3-xClx Solar with improved charge transport layers. LU CFI 34. zinātniskā konference, 20-22. February, Riga, 2018, book of abstracts p. 58

K97. Florian Helmuth Gahbauer, Spin Detection using Nitrogen-Vacancy Centres in Diamond, Development in Optics and Communications 2018 (DOC 2018), 12-13 April, 2018.

PĒTNIECĪBAS METODIKAS

PM1. Metodika pirmās kārtas molekulārās hiperpolarizācijas (β) vērtības noteikšanai.

PM2. Metodika divfotonu absorbcijas un Kerra efekta koeficientu noteikšanai ar Z-scan metodi.

PhD THESIS:

E. Nitišs, „Nelināri optisku organisku stiklu viļņvadu un to pielietojumu pētījumi”, 2015, LU

T1. Mozers: "Experimental studies of laser radiation interaction with Rb atoms in an external magnetic field", aizstāvēts 2016.g. 12.janvārī.

T2. U.Gertners, Amorfo materiālu virsmas foto-inducētā modulācija, Dr.phys. disertācija, LU CFI, 2015.

T3. J. Latvels Inovatīvu organisko materiālu saules elementu fotoelektriskās īpašības, RTU, 2015

T4. Bērziņš „Magnetooptiskie efekti sārmu metālu tvaikos un to pielietojumi magnētiskā lauka mērījumos”, aizstāvēts 2016. gada 14. martā.

T5. A. Krūziņš „Sajauktu ierosinātu stāvokļu augstas izšķiršanas spējas spektroskopija cēziju un rubīdiju saturošās divatomu molekulās, aizstāvēts 2016. gada 24. maijā.

T6. I. Birzniece „Ierosināto singleta Pi stāvokļu lāzeru spektroskopija un potenciālu konstruēšana KCs un RbCs molekulās, aizstāvēts 2016. gada 24. maijā.

T7. Kaiva Juraševska "Psihofizikāla pseidoizohromatiska testa izveide un krāsu izšķirtspējas sliekšņa novērtējums ", aizstāvēts 2016. gada 29. jūnijā

MMASTER’S THESIS:

M1. A.Zaičenko. Preparation of 3-N-(2-chloroacetamido)benzanthrone and its derivatives. Master’s thesis, 2014, RTU

M2. Jūlija Perveņecka, DMABI savienojuma un tā atvasinājumu plāno kārtiņu elektriskās īpašības, LU FMF, 2015, 68 lpp

M3. Igors Mihailovs, Racionālas kvantu ķīmiskās aprēķinu metodes izvēle molekulu jonizācijas enerģijai un elektrontieksmei kondensētā fāzē, RTU LĶMZF, 2015

M4. Mārtiņš Narels, Piranilidena atvasinājumu optiskās un pastiprinātās spontānās emisijas īpašības PVK matricā, LU FMF, 2015, 51 lpp.

M5. K.Klismeta, Azobenzolu saturošs molekulārais stikls kā optiskā ieraksta materiāls, Maģistra grāds, LU CFI, 2015.

M6. Anastasija Ivanova, Organometālisko svina halogenīdu perovskīta saules elementu izveide un izpēte, RTU LĶMZF, 2015.

M7. Karīna Siltāne, Amorfo fāzi veicinošus aizvietotājus un cianoetiķskābes akceptoro fragmentu saturošu luminoforu sintēze un īpašības, RTU LĶMZF, 2015

M8. Elīna Misiņa, Pirimidīn-2,4,6(1h,3h,5h)-triona fragmentu saturošu 4h-pirān-4-ilidēn un piridīn-4(1h)-ilidēn atvasinājumu sintēze un to luminoforās īpašības, RTU LĶMZF, 2015

M9. Toms Puciriuss, Amorfu fāzi veidojošu mazmolekulāru organisku irīdija (III) kompleksu sintēze un to gaismas emisijas īpašības”, RTU LĶMZF, 2015

M10. Bērziņš Jānis. Acs segmentu spektrometrijas kontrole. M.Ozoliņš

M11. Muižniece Kristīne.Vienlaicīga stereodisparitātes un hromostereopses klātbūtne vizuālajos stimulos. M.O.

M12. Arturs Bundulis, Organisko materiālu trešās kārtas dielektriskās uzņēmības noteikšana ar “z-scan” metodi, vad. Dr.phys. Edgars Nitišs. Darbs aizstēvēts 06.2016.

M13. Juhņevičs Nikolajs, Luminiscējošu lantanīdu β-diketonu kompleksu sintēze un pētījumi (Synthesis and studies of luminescent lanthanide complexes with –diketones)

M14. Kricka Alisa, Uz benzimidazola bāzes veidotu hinonu sintēze un īpašību izpēte (Synthesis and studies of properties of benzimidazole-based quinone derivatives)

COMERTIAL CONTRACTS

L1. SIA “LEO pētījumu centrs” - Plāno kārtiņu tehnoloģiju pētījumi.

L2. SIA “EVOLED” – Organisko gaismu emitējošo diožu prototipēšana.