Intensity of Surface Plasmon-Polaritons at a Photonic Crystal–Gold Interface Depending on the Radiation Wavelength

Abstract

We calculate the amplitudes of surface plasmon-polaritons (SPP) excited at a photonic-crystal–metal interface. Using a three-wave approximation, we evaluate optical fields in the crystal medium. The generation of plasmons at the boundary between the photonic crystal (PhC) and gold substrate is numerically analyzed in the wavelength range of a plane incident wave 400–1,900 nm. The optimum wavelength corresponding to the maximum plasmon amplitude is determined.