Dear Steven and All,
Suppose we have a L3 cavity in hole-slab structure,
I want to calculate the mode in
[Y. Akahane, T. Asano, B. S. Song, and S. Noda, "High-Q photonic nanocavity
in a two-dimensional photonic crystal," Nature 425, 944-947 (2003).]
I put a point source at the center of the cavity, which is also the origin.
If I am using Ey gaussian source excitation,
I guess the maximum symmetry is:
(set! symmetries (list
(make mirror-sym (direction Y) (phase -1))
(make mirror-sym (direction X) (phase 1))
(make mirror-sym (direction Z) (phase 1))
))
If I am using Hz gaussian source excitation,
the maximum symmetry is:
(set! symmetries (list
(make mirror-sym (direction Y) (phase -1))
(make mirror-sym (direction X) (phase -1))
(make mirror-sym (direction Z) (phase 1))
))
The mode should have both Ey and Hz components,
but the symmetries are different for Ey and Hz.
Does the symmetry only apply to the excitation source?
When field components have conflicting symmetries,
what is maximum applicable symmetry for this case?
Best Regards,
Jing Ouyang
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