Graphene-based non-reciprocal metasurface

A new type of non-reciprocal - essentially frequency independent - Faraday rotation effect in magnetically biased graphene is analyzed and compared to the conventional Faraday rotation effect observed in three dimensional plasmas. The possibility of controlling the amount and the direction of polarization rotation through the chemical potential is demonstrated. A resonant bandbass metasurface is employed to control the frequency response of the otherwise frequency independent gyrotropic characteristics of graphene.