Performing of New Nonlinear LiInS2 And LiInSe2 Crystals for Estimation of Their Application Outlooks

摘要

This report results from a contract tasking Design and Technological Institute of Monocrystals as follows: The goal of project is to grow bulk LiInS2 crystals and to prepare batches of both LiInS2 and LiInSe2 crystals of selected forms such as oriented plates, parallelograms, and prisms for detailed study in the USA of the main properties such as their transparency, residual absorption due to deep levels, refractive indices and electric conductivity. The LiInS2 and LiInSe2 crystals will be characterised in chemical composition, crystal lattice parameters and energy gap, and compared with literature data. The as-grown crystals will be annealed in certain atmospheres for correction of their chemical composition, if necessary. Their optical quality will be tested using optical microscopy, shadow and interference techniques. Their further investigation in the U.S.A. is expected to allow an estimate of their future applications.