Abstract
Surface plasmons (SPs) are coherent delocalized electron oscillations that exist at the interface between any two materials where the real part of the dielectric function changes sign across the interface. The excitation of SPP modes strongly depend on the geometric and material parameters, and the frequency. In this paper, we studied the SPP modes at metal/dielectric (isotropic, anisotropic or gyrotropic), metal/semiconductor and semiconductor/dielectric interfaces. The effect of anisotropy and gyrotropy is considered for the dispersion characteristics. The magnetised semiconductor medium provides an opportunity to make it suitable for sensing and switching applications..
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