Abstract
We present a study of the electromagnetic field profiles for coupled surface plasmon-polariton systems. Results for both the symmetrically-clad thin metal film structure and the metal-clad dielectric cavity are given. We also consider an asymmetrically-clad thin metal-film structure and show that such a structure may also support coupled SPP modes under appropriate conditions. We describe our method for calculating the field profiles in detail. In contrast to previous methods our approach does not require the introduction of an input field, it allows straightforward computation of the field profiles associated with the optical modes of multilayer planar structures.
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