Surface states in two-dimensional metallodielectric photonic crystals studied by a multiple-scattering method - art. no. 125114

We present a multiple-scattering method in conjunction with supercell calcu lations to study the electromagnetic surface states in two-dimensional meta llodielectric photonic crystals. In the case of dielectric photonic crystal s with cylindrical scatterers, this method is able to produce surface state s inside a partial or full gap for p-polarized waves, similar to those foun d previously by using the method of plane-wave expansion. However, in two d ifferent systems of metallodielectric photonic crystals we have studied her e, we do not find surface states. This is true for bath perfect metal and m etal with a Drude-like dielectric function. The absence of surface states m ay be attributed to the expulsion of electric field from the surface into t he homogeneous medium due to the presence of metallic component, making the formation of surface unfavorable.