Dear Prof. and MPB users
For simulating coupled cavities in photonic crystal slab, I have to
choose a big supercell (e.g. 5a * 15a in x and y direction respectively).
In order to assure the correctness of the ctl file and simulation, I
simulate a photonic crystal waveguide by removing a row of holes in
trangular lattice of holes in PC. When I use 1a*15a supercell, I can see
clearly the Band Gap and guided mode in the gap. But when I use the 5a *
15a supercell, several modes folded in band gap.
How can I recognize the guided mode?
Seems, my question is a basic question in PBG and photonic crystal, but
if any of the respected MPB user can help, it will be highly appreciated.
Thanks
Yingjun YL
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