Dear Steven and MPB users As you know, some photonic crystals compose materials, have "complex frequency-dependent dielectric permittivity ( epsilon(omega)=Real_epsilon(omega) + i Imag_epsilon(omega) )". Is it possible to calculate their band structure by MPB? I don't know that how can I consider the dependence of epsilon on frequency in the code. Any help can be greatly appreciated. Thank you, Hodjat.
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