Effect of post-growth annealing on the optical properties of LiGaS2 nonlinear crystals

Alexander Yelisseyev; Marina Starikova; Ludmila Isaenko; Sergei Lobanov; Valentin Petrov

doi:10.1117/12.874547

21 February 2011 Effect of post-growth annealing on the optical properties of LiGaS₂ nonlinear crystals

Alexander Yelisseyev, Marina Starikova, Ludmila Isaenko, Sergei Lobanov, Valentin Petrov

Proceedings Volume 7917, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications X; 79171S (2011) https://doi.org/10.1117/12.874547
Event: SPIE LASE, 2011, San Francisco, California, United States

Abstract

High chalcogen volatility and Li interaction with the container walls result in variation of crystal composition and presence of both extended and point defects in as-grown LiGaS2 nonlinear crystals. Annealing in appropriate conditions is used to correct the composition and improve the optical quality. We annealed LiGaS2 in vacuum, in the presence of Li₂S, Ga₂S₃, and S, and studied changes in transmission, photoluminescence and photo-induced absorption. OH groups, S-H and S-S complexes, sulfur vacancies and cation antisite defects (GaLi) are most important. Photo-induced absorption is reversible: It appears after illumination with UV/blue light and disappears after illumination with IR light or by heating the sample.

Citation Download Citation

Alexander Yelisseyev, Marina Starikova, Ludmila Isaenko, Sergei Lobanov, and Valentin Petrov "Effect of post-growth annealing on the optical properties of LiGaS₂ nonlinear crystals", Proc. SPIE 7917, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications X, 79171S (21 February 2011); https://doi.org/10.1117/12.874547

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