Abstract
The general dispersion relation of surface plasma oscillations (SPO) excited in a multilayered medium made of n thin films having a complex permittivity is given, using a formalism well adapted to numerical calculations. The electromagnetic (EM) energy density repartition in the films — and along the interface — as well as the reflection coefficient R of the system illuminated by a plane p-polarized wave under variable incidence are then calculated. Practical examples concerning typical metal-insulator (MI) or metal-insulator-metal (MIM) devices are then given, showing the exact localization of the excited SPO corresponding to a minimum of R and the resulting enhancement of the energy density.
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