SLAB PLASMON POLARITONS AND WAVE-GUIDE MODES IN 4-LAYER RESONANT SEMICONDUCTOR WAVE-GUIDES

This paper presents a detailed study of the waveguide and plasmon pola riton properties of four-layer systems involving highly doped semicond uctor material. The dispersion relations of waveguide and plasmon pola riton modes are calculated for different geometrical parameters and ma terial properties. Special attention is paid to the transition region between the latter modes, which exhibits a complex behavior. Slab plas mon polaritons at wavelengths slightly larger than the plasma waveleng th, yielding a positive real part of the permittivity, have been found . Finally, applications at wavelengths near the transition region and near the plasma wavelength are proposed and discussed. (C) 1997 Americ an Institute of Physics.