Growth and Properties of LiGaX2 (X: S, Se, Te) Single Crystals for Nonlinear Optical Applications in the Mid-IR.
Growth and Properties of LiGaX2 (X: S, Se, Te) Single Crystals for Nonlinear Optical Applications in the Mid-IR.
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DOI：
10.1002/chin.200330010
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发表时间：
2003-07
期刊：
影响因子：
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通讯作者：
L. Isaenko;A. Yelisseyev;S. Lobanov;A. Titov;V. Petrov;J. Zondy;P. Krinitsin;A. Merkulov;V. Vedenyapin;J. Smirnova
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文献类型：
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作者：
L. Isaenko;A. Yelisseyev;S. Lobanov;A. Titov;V. Petrov;J. Zondy;P. Krinitsin;A. Merkulov;V. Vedenyapin;J. Smirnova
生长了光学性质的LiGaX2(X=S，Se，Te)单晶，其透过率分别为0.32-11.6μm，0.37-13.2μm和0.54-14.2μm。前两个LiGaS2和LiGaSe2具有纤锌矿结构，而LiGaTe2是四方结构(黄铜矿晶格)。在LiGaS_2和LiGaSe_2的全透明范围内测量了三种折射率，发现它们非常接近(准单轴光学各向异性)，在6.5μm(LiGaS_2)和8μm(LiGaSe_2)处有一个交叉点。拟合了Sellmeier方程，计算了二次谐波的相位匹配条件：LiGaS2和LiGaSe2覆盖了基频的1.467-11.72μm光谱范围。
Single crystals LiGaX2(X = S, Se, Te) of optical quality were grown, with transparency ranges at 5 cm‐1absorption level of 0.32‐11.6 μm, 0.37‐13.2 μm and 0.54‐14.2 μm, respectively. The first two, LiGaS2and LiGaSe2, have a wurtzite‐type structure whereas LiGaTe2is tetragonal (chalcopyrite lattice). The three refractive indices were measured in the whole transparency ranges of LiGaS2and LiGaSe2andnaandncwere found to be very close (quasi‐uniaxial optical anisotropy) with a crosspoint at 6.5 μm (LiGaS2) and 8 μm (LiGaSe2). Sellmeier equations were fitted and phase‐matching conditions for second harmonic generation (SHG) were calculated: the 1.467‐11.72 μm spectral range for the fundamental is covered by LiGaS2and LiGaSe2.