砷化锗镉,CdGeAs2,是三元的黄铜矿类半导体,具有非常高的非线性光学系数(236pm/V),这使得其作为CO2激光器倍频转换方面有突出的优势.长期以来生长晶体时由于存在严重的各向异性而使晶体开裂.砷化锗镉晶体在5.5μm处存在强吸收使得频率转化的效率非常低,此吸收是晶体内存在大量受体缺陷造成的.本文对晶体生长的几种方法和红外吸收进行论述,并提出掺杂予体的方法降低红外吸收.
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