光子晶体谐振腔

- February 13, 2022 at 1:14 pm
  
  Jackson_zZ
  Subscriber
  
  您好，请问怎么用FDTD solution去计算光子晶体谐振腔的品质因数Q值？
- February 14, 2022 at 4:51 pm
  
  Guilin Sun
  Ansys Employee
  
  网上有几个例子可以参考，基本上有两种方法：一是对时间信号做傅里叶分析；而是用用信号处理的算法计算，即findresonances - Script command
  此外还分低Q和高Q方法，前者在频域计算，即根据Q的简单定义计算透射反射曲线的半宽，需要等信号彻底衰减；后者不需要仿真长时间，因为是从有限时间信号就可以得到。
  参见
  https://support.lumerical.com/hc/en-us/sections/360006919094-Resonators
  Tips for simulating high Q Photonic Crystal (PhC) Cavity
  Photonic crystal cavity

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