Tianjin Key Laboratory of Functional Crystal Materials, Institute of Functional Crystal, College of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384, China.
School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, China.
在 CS BaGa 2 Se 4 中采用温度诱导中心对称 (CS) 到非中心对称 (NCS) 转换方法来揭示新的 NCS 硫族化物 β-BaGa 2 Se 4，它表现出良好平衡的非线性光学 (NLO) 特性，包括中等相位匹配的二次谐波产生 (SHG) 响应 (0.6×AgGaS 2 ) 和宽透明窗口 (0.5–25 μm)。这些表现表明β-BaGa 2 Se 4是一种很有前途的红外非线性光学晶体。
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Designing A New Infrared Nonlinear Optical Material, β-BaGa2Se4 Inspired by the Phase Transition of the BaB2O4 (BBO) Crystal
A temperature-induced centrosymmetry (CS) to noncentrosymmetric (NCS) transformation approach is employed in CS BaGa2Se4 to uncover a new NCS chalcogenide, β-BaGa2Se4 which exhibits well-balanced nonlinear optical (NLO) properties, including moderate phase-matchable second harmonic generation (SHG) response (0.6×AgGaS2) and wide transparent window (0.5–25 μm). These performances indicate that β-BaGa2Se4 is a promising IR NLO crystal.
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