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

被引：0

作者：

Yelisseyev, Alexander ^{[1
]}

Starikova, Marina ^{[2
]}

Isaenko, Ludmila ^{[1
]}

Lobanov, Sergei ^{[1
]}

Petrov, Valentin ^{[3
]}

机构：

[1] SB RAS, Inst Geol & Mineral, Novosibirsk 630058, Russia

[2] Novosibirsk State Univ, Novosibirsk 630028, Russia

[3] Max Born Inst Nonlinear Opt & Ultrafast Spect, D-12489 Berlin, Germany

来源：

NONLINEAR FREQUENCY GENERATION AND CONVERSION: MATERIALS, DEVICES, AND APPLICATIONS X | 2011年 / 7917卷

关键词：

nonlinear optical crystals; annealing; defects; optical properties; MID-IR; SINGLE-CRYSTALS; GROWTH; TE; SE; GA;

D O I：

10.1117/12.874547

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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 (Ga-Li) 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.

引用

页数：8

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