Dear Steven, dear meep-users I have a question about the convergence of the quality-factor using different resolutions. Im trying to optimize a M0-cavity in a triangular photonic crystal slab. For an unoptimized structure, I tested the convergence of the quality-factor for different resolutions up to 32. At a resolution of 20, the Q-factor starts to converge to Q~50000. After a long optimization process by shifting holes or decreasing the radii, I get a Q-factor of 715000 using resolution 20. But applying resolution 32 or 28, harminv finds a Q-factor of only Q~250000. Why does the convergence not set in any longer at resolution 20 for higher Q-factors? How can I be sure that my structure is really optimized and the higher Q-factor is not due to a resolution-problem?
I would appreciate any help, thanks in advance. Best regards Janine Riedrich-Moeller
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