Surface Plasmon Polaritons: Dispersion and Excitation

This lecture covers the dispersion relation of surface plasmon polaritons (SPP) on thin films, deriving it based on reflectivity and discussing the intuitive approach of SPP coupling on interfaces. It also explores the characteristics of long-range and short-range SPP modes, their charge distributions, and the excitation methods for SPP propagation. The lecture further examines the behavior of SPP on different thicknesses of gold films on glass substrates, emphasizing the energy transfer to the SPP mode and minimal light reflection.