July 6, 2021 at 5:57 pm
Guilin Sun
Ansys Employee

In0.6Ga0.4As是主动材料吗？如果是，显然你需要看到其介电常数的虚部是负数才可以出现增益，一般建议使用　Magnetic Electric Lorentz 材料模型，参见



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Advanced and custom optical material models in FDTD and MODE

https://support.lumerical.com/hc/en-us/articles/360034394734
The following material models can be used in a variety of advanced applications, such as non-linear device…


当然你可能并不知道这个材料模型的具体参数，可以根据已有材料-波长点反算。