米氏散射系数

- March 10, 2023 at 7:37 am
  
  Shan mengzhu
  Subscriber
  
  老师，请问FDTD中可以计算周期性结构中的纳米盘的米氏散射系数频谱图吗，以及分别计算ED（电偶极子共振）和MD（磁偶极子共振）模式系数随频率的变化？像下图所示的这种图，此图是无限长椭圆柱的散射分析相关图。
- March 13, 2023 at 11:15 pm
  
  Guilin Sun
  Ansys Employee
  
  模式系数什么定义？
  ED（电偶极子共振）和MD（磁偶极子共振）应该是对应散射曲线峰值波长的场类似于这种偶极子辐射，参见 Ansys Insight: 极子四极子六极子八极子十极子等的散射仿真
  周期结构要做这是散射辐射图可能比较成问题，因为周期结构的远场是离散的衍射级，不大可能出现这种辐射图。虽然我没有参考文献，但是根据我的知识应该是没有这种辐射图的，除非是随机粒子，但是也是分立的，请再琢磨。

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