Theory of electromagnetic modes of magnetic effective-medium films

Abstract

We study the surface and guided wave polaritons for a magnetic layered structure on a substrate. Using the effective-medium approximation we obtain analytic equations for implicit dispersion relations. These dispersion relations are solved numerically for a variety of layering patterns, and profiles showing the localization of both guided waves and surface waves are obtained. Explicit results are presented for an - superlattice on a substrate.