I have a three-dimensional photonic crystal cavity using comsol. My aim is to calculate the quality factor in this structure? please tell me about boundary condition and study?
thanks a lot
Eigensolver of COMSOL can be utilized.
https://www.comsol.jp/model/computing-q-factors-and-resonant-frequencies-of-cavity-resonators-9618
As boundaries, you can use PML to terminate infinite fields:
https://www.comsol.com/blogs/using-perfectly-matched-layers-and-scattering-boundary-conditions-for-wave-electromagnetics-problems/
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