APPLICATION OF Z-SCAN TECHNIQUE FOR STUDY OF NONLINEAR OPTICAL PROPERTIES OF MATERIALS
Arturs Bundulis (ISSP UL Laboratory of Organic Materials)
The rapid development of applications of optical technologies in the telecommunications industry requires a broader understanding of nonlinear optical (NLO) properties of materials and their relation to molecular structure. Examples include two-photon absorption and Kerr effect, which must be taken into account when designing devices to control the power of optical signal, store data and modulate optical signal. The Z-scan technique may be used to determine the two-photon absorption coefficient and nonlinear refractive index. The Z-scan technique uses a focused laser beam for sample research. The sample is positioned in the laser beam path and guided through the focus. By analyzing changes in laser beam intensity and shape, it is possible to determine the NLO effect coefficients. Due to its simplicity, it is one of the most popular methods for studying the third and higher order of NLO effects.
This presentation will discuss two-photon absorption, the Kerr effect and the Z-scan method. The results obtained by analyzing dimethyl amino benzylidene-1,3-indandione (DMABI) and its derivatives will be demonstrated.