中国光学, 2012, 5 (1): 57, 网络出版: 2012-03-06
GaSe∶AgGaSe2晶体的光学性能及应用
Optical properties and application of GaSe∶AgGaSe2 crystal
GaSe∶AgGaSe2晶体 光学特性 中红外波段 THz波段 二次谐波振荡 GaSe∶AgGaSe2 crystal optical property mid-infrared THz range Second Harmonic Generation(SHG)
摘要
从GaSe∶AgGaSe2熔体(质量掺杂浓度为10%)中生长的非线性光学晶体ε-GaSe∶Ag晶体(质量掺杂浓度≤0.04%)是一种非中心对称晶体,可用于相位匹配频率转换。Ag的掺入使GaSe晶体的显微硬度提高了30%,从而使其可以在任意方向上进行切割和抛光。本文研究了GaSe∶AgGaSe2晶体在可见、中红外及太赫兹波段的光学性能。实验证明: GaSe∶AgGaSe2晶体的吸收系数是纯GaSe晶体的2倍,其CO2激光倍频效率是ZnGeP2晶体的1.7倍。
Abstract
The nonlinear optical crystal grown from the melt GaSe∶AgGaSe2(10%, mass percent) is identified as acentrosymmetric ε-GaSe∶Ag(≤0.04%, mass percent) and is used for phase matched frequency conversion. The silver presence results in 30% increase in microhardness, which allows the crystal to be cut and polished at arbitrary direction. The optical properties from visible to mid-IR and further THz ranges are studied in detail. It demonstrates that the absorption coefficient of GaSe∶Ag(≤0.04%, mass percent) crystal is twice that of a pure GeSe, and the CO2 laser Second Harmonic Generation(SHG) efficiency is about 1.7 times that of ZnGeP2 crystal.
古新安, 朱韦臻, 罗志伟, ANGELUTS A A, EVDOKIMOV M G, NAZAROV M M, SHKURINOV A P, ANDREEV Y M, LANSKII G V, SHAIDUKO A V, KOKH K A, SVETLICHNYI V A. GaSe∶AgGaSe2晶体的光学性能及应用[J]. 中国光学, 2012, 5(1): 57. KU Shin-an, CHU Wei-chen, LUO Chih-wei, ANGELUTS A A, EVDOKIMOV M G, NAZAROV M M, SHKURINOV A P, ANDREEV Y M, LANSKII G V, SHAIDUKO A V, KOKH K A, SVETLICHNYI V A. Optical properties and application of GaSe∶AgGaSe2 crystal[J]. Chinese Optics, 2012, 5(1): 57.