案例Rectangular Photonic Crystal Bandstructure

- February 2, 2023 at 12:44 pm
  
  zhang han
  Subscriber
  
  在计算案例Rectangular Photonic Crystal Bandstructure的时候，为了方便计算，kx是从0取到1/3，但这是在波矢k除以2pi/sqrt(3)/a归一后的结果，但在计算相位推迟的时候，为什么只需要将kx乘上2pi/a呢？
- February 2, 2023 at 4:21 pm
  
  Guilin Sun
  Ansys Employee
  
  这是因为，kx从0取到1/3是相对2pi/a这个最大的基频Bloch模式波矢的。在计算位相延迟时，需要用绝对的波矢才可以。注意，如果是Rectangular，归一应该用2pi/a，不能再除以sqrt(3)，否则就是三角形光子晶体了。
  请注明是哪个例子。
- February 3, 2023 at 10:48 am
  
  zhang han
  Subscriber
  
  老师不好意思，案例写错了，应该是Triangular, FCC, BCC Photonic Crystal Bandstructure（https://optics.ansys.com/hc/en-us/articles/360041566734），在计算三角形光子晶体的时候，kx是0~1/3，但是script里计算相位延迟的时候，好像只是乘了2pi/a，并不是2pi/sqrt(3)/a，不知道是我哪里理解错了？
- February 3, 2023 at 6:14 pm
  
  Guilin Sun
  Ansys Employee
  
  你的理解没有错。应该是例子错了。你修改一下脚本，可能Tolerance也需要改，以便仅提取所需要的数据。

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