Surface Plasmon Polaritons Excited By Electromagnetic Waves Under General Boundary Conditions

TL;DR

This paper derives general conditions for exciting surface plasmon polaritons at a single interface considering non-zero surface charges and currents, expanding understanding of SPP excitation mechanisms.

Contribution

It introduces a comprehensive framework for SPP excitation under general boundary conditions including surface charges and currents, which was not previously addressed.

Findings

Derived general conditions for SPPs with non-zero surface charges and currents

Solved for surface source distributions and electromagnetic waves for such SPPs

Extended the theoretical understanding of SPP excitation mechanisms

Abstract

We investigate single interface surface plasmon polaritons (SPPs) excited by electromagnetic waves under general electromagnetic boundary conditions that allow for non-zero surface charge and surface current densities. Incorporating these, we derive general conditions for single interface SPPs and solve both the surface source distributions and the surface electromagnetic waves for such SPPs when excited by electromagnetic waves.