On the application of Snell's law for refracted graphene surface plasmon polaritonwaves

Abstract

The direction of refracted graphene surface plasmon polariton waves due to the variation of their effective index is estimated in the current work. After the extraction of the fundamental relationships for the propagation properties of a graphene surface wave, the effective index is derived and the well-known Snell's law is utilized. Moreover, the direction angle is obtained by means of a comprehensive numerical analysis, addressing an accurate finite-difference time-domain algorithm, which validates all theoretical estimations.