中红外非线性光学晶体通过典型的变频技术可高效输出中红外激光, 是中红外激光器的重要部件, 在**和民用领域有着广泛的应用。目前有实际应用前景的中红外非线性光学材料大多是由四面体基元构成结构框架的四配位硫属化合物。本文回顾了21种代表性四配位硫属化合物的晶体结构、光学性能, 以及理论计算结果, 分析总结了四配位硫属中红外非线性光学晶体的晶体结构与光学性能之间的关系, 这对探索性能优异的新型中红外非线性光学晶体具有重要指导意义。

Mid-infrared (MIR) nonlinear optical (NLO) crystal can output MIR lasers efficiently through the typical frequency conversion technology. It is an important part of MIR laser and has been widely used in the military and civil fields. At present, most of the mid-infrared nonlinear optical materials with practical application prospects belong to tetrahedron-based chalcogenides whose structural framework is composed of tetrahedral units. This review summarizes the structure-performance relationship in MIR NLO tetrahedron-based chalcogenides by analyzing crystal structure, optical property and theoretical calculation of 21 representative tetrahedron-based chalcogenides compounds, which will be of great importance for the exploration of novel MIR NLO crystals.