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Main publications
Last Update
18.02.2018

2017

M. Kemere, J. Sperga, U. Rogulis, G. Krieke, J. Grube, Luminescence properties of Eu, RE3+ (RE=Dy, Sm, Tb) co-doped oxyfluoride glasses and glass-ceramics, J. of Luminescence, 2017, vol.181, pp. 25-30, DOI: 10.1016/j.jlumin.2016.08.062.

Krieke, G., Sarakovskis, A., Ignatans, R., Gabrusenoks, J. Phase transitions and upconversion luminescence in oxyfluoride glass ceramics containing Ba4Gd3F17 nanocrystals.(2017) Journal of the European Ceramic Society, 37 (4), pp. 1713-1722.

Guna Krieke, Anatolijs Sarakovskis, Maris Springis. Upconversion luminescence of a transparent glass ceramics with hexagonal Na(Gd,Lu)F4 nanocrystals. Journal of Alloys and Compounds, (2017), 694 952e958.

2016

E. Elsts, G. Krieke, U. Rogulis, K. Smits, A. Zolotarjovs, J. Jansons, A. Sarakovskis, K. Kundzins, Rare earth doped glass-ceramics containing NaLaFnanocrystals, Optical Materials 2016, vol. 59, p. 130-135, DOI: 10.1016/j.optmat.2016.01.005

U. Rogulis, Optical detection of paramagnetic centres: from crystals to glass-ceramics, 2016, Low temperature physics, 2016, v. 42, No. 7, pp. 689-693

A. Cvetkovs, O. Kiselova, U. Rogulis, V. Serga, R. Ignatans, Synthesis of ZnO and CdO-ZnO thin films by extraction–pyrolytic method, Latvian Journal of Physics and Technical Sciences, 2016, vol. 53, pp. 57–66, DOI: 10.1515/lpts-2016-0021

Oxygen influence on luminescence properties of rare-earth doped NaLaF4 A.Tuomela a,n, V.Pankratov, A.Sarakovskis, G.Doke, L.Grinberga, S.Vielhauer, M.Huttula. Journal of Luminescence, (2016), 179, pp.16–20.

Guna Krieke, Anatolijs Sarakovskis. Crystallization and upconversion luminescence of distorted fluoritenanocrystals in Ba2+containing oxyfluoride glass ceramics. Journal of the European Ceramic Society, (2016), 36, pp.1715–1722.

Jurgis Grube. Temperature influence on NaLaF4:Er3+ green luminescence. Journal of Luminescence, (2016), 179, pp. 107–113.

E. K. Yukhno, L. A. Bashkirov, P. P. Pershukevich, S. V. Slonskaya, N. A. Mironova- Ulmane, A. G. Sharakovskis. Excitation and photoluminescence spectra of solid solutions based on lanthanum indate LaInO3 of a perovskite structure doped with Nd3+ and Cr3+ ions. Glass Physics and Chemistry, (2016), v.42, pp. 379–385.

Sarakovskis, A., Grube, J., Strals, K., Krieke, G., Springis, M., Mironova-Ulmane, N., Skvortsova, V., Yukhno, E.K., Bashkirov, L.A. Temperature and impurity concentration effects on upconversion luminescence in LaInO3 doped with Er3+. Fizika Nizkikh Temperatur, (2016), v.42, pp. 733-737.

B.Berzina, V.Korsaks, L.Trinkler, A.Sarakovskis, J.Grube, S.Bellucci. Defect-induces blue luminescence of hexagonal boron nitride. Diamond and related materials. 68 (2016) 131-137.

L.Trinkler, A.Trukhin, B.Berzina, V.Korsaks, P.Ščaev, R.Nedzinskas, S.Tumėnas, M.M.C.Chou, L.Chang, C-A.Li. Luminescence properties of LiGaO2 crystal. Optical materials, 2016, http://dx.doi.org/10.1016/j.optmat.2016.11.012.

2015

A. Fedotovs, Dz. Berzins, U. Rogulis, K. Smits, G. Doke, A. Medvids, P. Onufrijevs, Angular Dependence of Recombination Luminescence Detected EPR in ZnO Crystal, Physica scripta, 2015, vol. 90, No. 9, 094016. doi:10.1088/0031-8949/90/9/094016

A. Fedotovs, A. Antuzevics, U. Rogulis, M. Kemere, R. Ignatans, Electron paramagnetic resonance and magnetic circular dichroism of Gd3+ ions in the Oxyfluoride Glass-ceramics containing CaF2 nanocrystals, J. of Non-Crystalline solids, 2015, vol. 429, pp. 118-121.

A. Antuzevics, U. Rogulis, A. Fedotovs, Dz. Berzins, V. N. Voronov and J. Purans, EPR Study of Gd3+ local structure in ScF3 – crystal with negative thermal expansion coefficient, Physica Scripta, 2015, vol. 90, p. 115801.

Anatolijs Sarakovskis, Guna Krieke. Upconversion luminescence in erbium doped transparent oxyfluorideglass ceramics containing hexagonal NaYF4nanocrystals. Journal of the European Ceramic Society,(2015), 35 (13), pp. 3665-3671.

A. Sarakovskis, G. Krieke, G. Doke, J. Grube, L. Grinberga, M. Springis, Comprehensive study on different crystal field environments in highly efficient NaLaF4:Er3+ upconversion phosphor, Optical Materials 39 (2015), p. 90 – 96.

V. Korsaks. Hexagonal boron nitride luminescence dependent on vacuum level and surrounding gases, Materials Research Bulletin 70, (2015) 976- 979.

2014

J. Grube, A. Sarakovskis, G. Doke, M. Springis, Impact of Er3+ Concentration on Luminescence in NaLaF4, Latvian Journal of Physics and Technical Sciences 51, 3 (2014), p. 42.

L. Trinkler, B.Berzina. Localised transitions in luminescence of AlN ceramics. Radiation Measurements, 71 (2014) 232-236.

L. Trinkler, B.Berzina. Recombination luminescence in aluminum nitride ceramics. Physica Status Solidi (B) Basic Research, 251 (2014) 542-548.

L.Trinkler, B.Berzina, E.Palcevskis. AlN Ceramics from nanosized plazma processed powder, its properties and application. Chapter in Book: Nitride ceramics. Combustion synthesis.(2014) 265-293.

2013

U. Rogulis, E. Elsts, J. Jansons, A. Sarakovskis, G. Doke, A. Stunda, K. Smits, Cathodoluminescence of oxyfluoride glass-ceramics, Radiation Measurements, 2013, vol. 56, pp. 120-123; DOI 10.1016/j.radmeas.2012.12.020

Doke, G., Sarakovskis, A., Grube, J., Springis, M. Photoluminescence of neodymium and erbium doped NaLaF4 material (2013) Radiation Measurements, 56, pp. 27-30.

Rogulis, U., Elsts, E., Jansons, J., Sarakovskis, A., Doke, G., Stunda, A., Smits, K. Cathodoluminescence of oxyfluoride glass-ceramics (2013) Radiation Measurements, 56, pp. 120-123.

P.Ščajev, L.Trinkler, B.Berzina, E.Ivakin, K.Jarašiunas. Influence of boron on donor-acceptor pair recombination in type IIa HPHT diamonds. Diamond and Related Materterials 36 (2013) 35-43.

2012

I. Brice, U. Rogulis, E. Elsts, J. GrūbePhotoluminescence of Eu and Ce activated oxyfluoride glass and glass ceramics. Latvian Journal of Physics and Technical Sciences, 2012, Nr. 6(I), p. 44.

A. Antuzevičs, A. Fedotovs, U. Rogulis, EPR spectrum angular dependences in LiYF4 crystal, Journal of Physics and Technical Sciences, 2012, Nr. 6(I), p. 49.

Dz. Berzins, A. Fedotovs, U. Rogulis, EPR hyperfine structure of radiation defect in oxyfluoride glass ceramics, Latvian Journal of Physics and Technical Sciences, 2012, Nr. 6(I), p. 55.

U. Rogulis, E. Elsts, J. Jansons, A. Sarakovskis, G. Doke, A. Stunda, K. Smits, Cathodoluminescence of oxyfluoride glass-ceramics, Radiation Measurements, 2013, vol. 56, pp. 120-123; DOI 10.1016/j.radmeas.2012.12.020

U. Rogulis, E. Elsts, J. Jansons, A. Sarakovskis, G. Doke, A. Stunda, K. Kundzins. Rare earth activated oxyfluoride glasses and glass-ceramics for scintillation applications. IEEE Transactions on Nuclear Science, 2012, Volume: 59, Issue: 5, Page(s): 2201 – 2206, Doi: 10.1109/TNS.2012.2212724

A. Sarakovskis, M. Voss, G. Doke, D. Jankovica, J. Grube. Synthesis of cubic and hexagonal NaYF4 :Er3+ (2012) IOP Conference Series: Materials Science and Engineering, 38, art. no. 012038;

R.Aleksiejūnas, P.Ščajev, S Nargelas, S.Miasojedovas, K.Jarašiūnas, L.Trinkler, J. Grigorjeva, B.Berzina, K.H.Chen, Y.T.Chen, M.W.Chen, and L.C.Chen. Carrier dynamics in epilayers and nanocolumns of ternary AlGaN with a tunable bandgap. IOP Conf. Series: Materials Science and Engineering 38 (2012) 012054.

L. Trinkler, B. Berzina, Z. Jevsjutina, J. Grabis, I. Steins and C. J. Baily. Photoluminescence of Al2O3 nanopowders of different phases. Optical Materials 34 (2012) 1553–1557; dx.doi.org/10.1016/j.optmat.2012.03.029.

V. Korsaks, B. Berzina, L. Trinklere. Influence of air, oxygen, nitrogen and argon gases on 400 nm luminescence in hexagonal boron nitride. Latvian journal of physics and technical science 49 (2012) 57-62.

T.Glaskova, M.Zarelli, A.Anishkevich, M.Giordano, L.Trinkler, B.Berzina , Quantitative optical analysis of filler dispersion degree in MWCNT-epoxy nanocomposite. Composites Science and Technology 72, 4 (2012).

2011

A. Fedotovs, Dz. Berzins, O. Kiselova, A. Sarakovskis and U. Rogulis. Analysis of Mn2+ EPR spectral shapes for studies of the oxyfluoride glass ceramics. IOP Conf. Ser.: Mater. Sci. Eng., 2011, vol. 23, 012018, doi:10.1088/1757-899X/23/1/012018.

J. Grube, G. Doke, M. Voss, A. Sarakovskis, M. Springis. Multicolor up-conversion luminescence in Rare-Earth doped NaLaF4 (2011) IOP Conference Series: Materials Science and Engineering, 23 (1), art. no. 012004;

A. Sarakovskis, M. Voss, G. Doke, J. Grube, M. Springis. Novel synthesis of up-conversion phosphor based on rare-earth doped NaLaF4 (2011) IOP Conference Series: Materials Science and Engineering, 23 (1), art. no. 012003;

L.Trinkler and B.Berzina. Luminescence properties in AlN ceramics and its potential application for solid state dosimetry. pp. 59-82. A chapter in book Advances in Ceramics - Characterization, 82 Raw Materials, Processing, Properties, Degradation and Healing. ISBN 978-953-307-504-4, Hard cover, 370 pages, Publisher: InTech, Publication date: August 2011.

L. Trinkler, B. Berzina, UV radiation induced processes in AlN and its potential application for solid state dozimetry. Conference proceedings ”Current challenges in radiation protection”, Reykjavik, (2011).

V. Korsaks, B. Berzina, L.Trinklere, Low temperature 450 nm luminescence of hexagonal boron nitride, Latvian Journal of Physics and Technical Science, 1 (2011).

L.Trinkler and B.Berzina, Luminescence properties in AlN ceramics and its potential application for solid state dosimetry, A chapter in book Advances in Ceramics - Characterization, 82 Raw Materials, Processing, Properties, Degradation and Healing. ISBN 978-953-307-504-4, 370 pages, Publisher: InTech, (2011).

L.Trinkler, B.Berzina, D.Jakimovica, J.Grabis, I.Steins, Peculiarities of photoluminescence of Al2O3 bulk and nanosize powders at low temperature, Optical materials, 33 (2011).

2010

A. Fedotovs, U. Rogulis, A. Sarakovskis, L. Dimitrocenko, EPR of radiation defcts in lithium-oxyfluoride glass ceramics. J. of Physics: Conference Series, 249 (2010)

A. Fedotovs, Dz. Berzins, A. Sarakovskis, U. Rogulis, G. Doke, EPR studies of the oxyfluoride glass ceramics using Mn2+ as a paramagnetic probe. IOP Conference Series: Materials and Engineering, 15 (2010)

E. Elsts, U. Rogulis, J. Jansons, A. Sarakovskis, Cathodoluminescence of terbium and ytterbium activated oxyfluoride glasses and glass ceramics. Latvian Journal of Technical Sciences, 5, pp. 48 (2010)

A. Fedotovs, U. Rogulis, A. Sarakovskis, L. Dimitrocenko, EPR of radiation defcts in lithium-oxyfluoride glass ceramics. J. of Physics: Conference Series, 249 (2010);

A. Fedotovs, Dz. Berzins, A. Sarakovskis, U. Rogulis, G. Doke, EPR studies of the oxyfluoride glass ceramics using Mn2+ as a paramagnetic probe. IOP Conference Series: Materials and Engineering, 15 (2010);

E. Elsts, U. Rogulis, J. Jansons, A. Sarakovskis, Cathodoluminescence of terbium and ytterbium activated oxyfluoride glasses and glass ceramics. Latvian Journal of Technical Sciences, 5, pp. 48 (2010);

A. Sarakovskis, J. Grube, G. Doke, M. Springis. Selective excitation of up-conversion luminescence by Yb3+-Er3+ energy transfer in glass and crystalline phase of oxyfluoride glass ceramics (2010) Optical Materials, 32 (8), pp. 832-835;

I. Tale, L. Dimitrocenko, P.Kulis, G. Marcins, A. Sarakovskis, A.Voitkans, Localization dynamics of exciton luminescence in InxGa1-xN epitaxial films. 11th Europhysical Conference on Defects in Insulating Materials (EURODIM2010) IOPPublishing, IOP Conf. Series: Materials Science and Engineering, 15 012059 (2010);

A. Sarakovskis, J. Grube, G. Doke, and M. Springis, Excited state absorption and energy transfer mechanisms of up-conversion luminescence in Er3+ doped oxyfluoride glass ceramics at different temperatures. J. Luminescence, 130, pp.805-811 (2010);

L.Trinkler, B.Berzina, D.Jakimovica, J.Grabis, I.Steins, UV-light induced luminescence process in Al2O3 bulk and nanosize powders, Optical Materials 32 (2010).

2009

U. Rogulis, R.C. Baetzold, J.-M. Spaeth, Luminescence-detected EPR of oxygen-vacancy complexes in CaF2, Physica status solidi (b), 246, (2009).

A.N. Trukhin, J. Teteris, A. Fedotov, D.L. Griscom and G. Buscarino, Photosensitivity of SiO2–Al and SiO2–Na glasses under ArF (193 nm) laser, Journal of Non-Crystalline Solids, 355, (2009).

J.Grabis, I. Steins, A.Patmalnieks, B.Berzina and L.Trinklere, Preparation and processing of doped AlN nanopowders, Estonian Journal of Engineering 15, 4 (2009).

Y.F. Zhukovskii, S. Bellucci, S. Piskunov, L. Trinkler, B. Berzina, Atomic and electronic structure of single-walled BN nanotubes containing N vacancies as well as C and O substitutes of N atoms, European Physical Journal B 67 (2009).

Y.F. Zhukovskii, S. Piskunov, N. Pugno, B. Berzina, L. Trinkler, S. Bellucci, Ab initio simulations on the atomic and electronic structure of single-walled BN nanotubes and nanoarches, Journal of Physics and Chemistry of Solids 70 (2009).

B. Berzina, L. Trinkler, D. Jakimovica, V. Korsaks, J. Grabis, I. Steins, E. Palcevskis, S. Bellucci, L.-C. Chen, S. Chattopadhyay, K. Chen, Spectral characterization of bulk and nanostructured aluminum nitride, Journal of Nanophotonics 3, 1 (2009).

2008

B. Henke, U. Rogulis, S. Schweizer, Structure sensitive investigations on luminescence centres in Mn-activated LiBaF3 dosimeters, Radiation Measurements, 43, (2008).

R.T. Williams, K.B. Ucer, D.L. Carroll, B. Berzina, L. Trinkler, V. Korsak, R. Krutohvostov, Photoluminescence of self-trapped excitons in boron nitride nanotubes, Journal of Nanoscience and Nanotechnology 8, 1-5 (2008).

E.M. Shishonok, L. Trinkler, S.V. Leonchik, B. Berzinya, Luminescence of thulium-activated cubic boron nitride, Journal of Applied Spectroscopy 75, 4 (2008).

L. Trinkler, B. Berzina, D. Kasjan, L.-Ch. Chen, Luminescence processes induced by UV radiation in AlN nanotips and nanorods, Radiation Measurements 43 (2008).

2007

A. Fedotovs, E. Elsts, U. Rogulis, A. Gulans, I.Tale, M. Nikl, N. Ichinose, K. Shimamura, EPR Hyperfine Structure of F-type Centres in Pure LiBaF3 Crystal, Physica status solidi (c), 4/3, (2007).

L. Dimitrocenko, U. Rogulis, A. Veispals, M. Springis, P. Kulis, A. Fedotovs, and A. Mishnev, Luminescence of Ce-doped borate-oxyfluoride glass ceramics, Physica status solidi (c), 4/3, (2007).

B. Henke, U. Rogulis and S. Schweizer, Optical and Electron Paramagnetic Resonance Studies on Radiation Defects in Mn-activated RbCdF3, Physica status solidi (c), 4/3, (2007).

S. Schweizer, B. Henke, U. Rogulis, and W. M. Yen, Recombination processes in rare-earth doped MAl2O4 (M = Ca, Sr) persistent phosphors investigated by optically-detected magnetic resonance, Physica status solidi (a), 4/3, (2007).

S. Schweizer, B. Henke, U. Rogulis, W.M. Yen, Optically-detected magnetic resonance investigations of recombination processes in undoped and rare-earth doped MAl2O4 (M = Ca, Sr) persistent phosphors, Applied Physics Letters, 90, (2007).

A. Sarakovskis, L. Dimitrocenko, A. Misnevs, U. Rogulis, M. Springis, Up-conversion process in Erbium doped lithium fluoride bulk crystal, lithium borate oxyfluoride glass and glass ceramics, J. of Physics: Conference series, 93, (2007).

L. Trinkler, B. Berzina, A. Auzina, M. Benabdesselam, P. Lacconi, Use of aluminum nitride for UV radiation dosimetry, Nuclear Instruments and Methods in Physics Research A 580 (2007).

B. Berzina, L. Trinkler, J. Grabis, I. Steins, Photoluminescence in AlN: macro-size and nano- powder, Physica Status Solidi (c) 4, 3 (2007).

2006

B. Henke, U. Rogulis, S. Schweizer, Optically detected magnetic resonance investigation of a luminescent oxygen-vacancy complex in LiBaF3, Journal of Physics: Condensed Matter, 18, (2006).

A.Fedotovs, E.Elsts, U.Rogulis, I.Tale, M.Nikl, N.Ichinose, K.Shimamura, EPR of F type centres in LiBaF3, Proceedings of the international Conference on Inorganic Scintillators and their Industrial Applications SCINT2005, Alushta, Ukraine, (2006).

B. Henke, U. Rogulis, and S. Schweizer, Luminescent oxygen-vacancy complex in Mn-doped LiBaF3 investigated by optically detected magnetic resonance, Proceedings of the international Conference on Inorganic Scintillators and their Industrial Applications SCINT2005, Alushta, Ukraine, (2006).

A. Fedotovs, L. Dimitrocenko, U.Rogulis, EPR of radiation defects in LiYF4 crystal, Proceedings of the international Conference on Inorganic Scintillators and their Industrial Applications SCINT2005, Alushta, Ukraine, (2006).

U. Rogulis, A. Veispals, L. Dimitrocenko, M. Springis, P. Kulis, A. Fedotovs, Optical properties of Ce-doped oxifluoride composites, Latvian Journal of Physics and Technical Sciences, 2 (2006).

S. Schweizer, B. Henke, U. Rogulis, and W. M. Yen, Recombination processes in rare-earth doped MAl2O4 (M = Ca, Sr) persistent phosphors investigated by optically-detected magnetic resonance, Physica status solidi (c), (2006).

S. Schweizer, B. Henke, U. Rogulis, W.M. Yen, Optically-detected magnetic resonance investigations of recombination processes in undoped and rare-earth doped MAl2O4 (M = Ca, Sr) persistent phosphors, Applied Physics Letters, (2006).

S. Schweizer, B. Henke, U. Rogulis, W.M. Yen, Magneto-optical resonance investigations on Eu- and Nd-/Dy-codoped CaAl2O4 and SrAl2O4 single crystals, "Proceedings of the First International Symposium on Persistent Phosphors", Quebec City, May 2005, Proceeding 06, (the Electrochemical Society, Pennington 2006).

B. Berzina, L. Trinkler, V. Korsak, R. Krutohvostov, D.L. Carrol, K.B. Ucer, R.T. Williams, Exciton luminescence of boron nitride nanotubes and nano-arches, Physica Status Solidi (b) 243, 14 (2006).

2005

S. Schweizer, B. Henke, U. Rogulis, W.M. Yen, Magneto-optical resonance investigations on Eu- and Nd-/Dy-codoped CaAl2O4 and SrAl2O4 single crystals, in: Science and Technology of Dielectrics in Emerging Fields -and- Persistent Phosphors (PV 2005-13), pp. 191-198. Published by: The Electrochemical Society, 2006. Editors: Worhoff, Misra, Mascher, Sundaram, Yen, and Capobianco ISBN: 1-56677-511-6.

A. Fedotovs, U. Rogulis, Perturbed Cd centre in BaF2 crystal, Latvian Journal of Physics and Technical Sciences, 3, (2005).

A. Sharakovsky, M. Springis, U. Rogulis, I. Tale, Photostimulated recombination processes in X-ray irradiated CsCdF3:Mn crystals, Proceedings of SPIE: 4th International Conference on Advanced optical Materials (AOMD-4), 5946, (2005).

M. Springis, A. Sharakovsky, I. Tale, U. Rogulis, X-irradiation induced photo- and thermostimulated luminescence of CsCdF3:Mn crystals, Physica status solidi (c), 2, (2005).

E. Elsts, U. Rogulis, EPR hyperfine structure of the Mo-related defect in CdWO4, Physica status solidi (c), 2, (2005).

M. Secu, U. Rogulis, B. Henke, S. Schweizer, J.-M. Spaeth, Optical and magneto-optical studies on Mn-activated LiBaF3, Physica status solidi (c), 2, (2005).

2004

I. Tkach, U. Rogulis, S. Greulich-Weber, J.-M. Spaeth, W-Band, Fabry-Perot microwave resonator for optically detected electron paramagnetic resonance and electron nuclear doeuble resonance of paramagnetic defects in solids, Review of Scientific Instruments, 75, (2004).