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Ansys Learning Forum Forums Discuss Simulation Photonics – Chinese 如何处理三维模型中电磁场的含时演化(给定初始值) Reply To: 如何处理三维模型中电磁场的含时演化(给定初始值)

Guilin Sun
Ansys Employee

没太清楚你的问题:你想在三维空间给一个时间初始值是什么意思。FDTD是时域仿真,时间零点空间内没有任何场。随着时间推移,光源信号逐步增加,达到最高点然后逐步减小,其轮廓基本上就是高斯函数。至于时间信号何时从器件里面全部出来,取决于结构/器件。因为不可能得到时间信号完全为零,所以一般情况下按autoshutoff min结束仿真,得到频域信号。