Ansys Insight: FDTD光源参数General项目的意义

- March 16, 2021 at 6:17 pm
  
  Guilin Sun
  Ansys Employee
  
  问：General下列项目的意义phase(degrees),angle theta (degrees),angle phi (degrees),以及polarization angl (degrees)?
  A：phase(degrees)是指该光源的初始位相；
  angle theta (degrees)是入射光的俯仰角
  angle phi (degrees) 是指入射光的方位角
  这两个角度的意义参见这个帖子的解释
  
  这两个角不能互相代替，但是通过polarization angle 可以有不同的方法设置同样的入射光。
  polarization angle (degrees)是指光源的偏振角。在FDTD仿真中，激励光源都是偏振的，而且一般的光束光源（平面波、TFSF、高斯和模式）都是线偏振的，要得到圆偏振光需要根据定义设置，而要得到非偏振和非相干光的结果，一般需要仿真一个以上的偏振结果然后作非相干叠加。

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