Faraday rotation in micro- and nano-patterned graphene metasurfaces

One of the most promising properties of graphene is giant Faraday rotation, which is the topic studied in this contribution. A periodic Method of Moment in conjunction with the Kubo formalism is used for modeling the interaction of an incident plane wave with a graphene metasurface. We demonstrate the interesting possibility of controlling the rotation angle, transmission magnitude, and axial ratio of the diffracted field through patterning the graphene layer. The control of giant Faraday rotation with micro- or nano-patterning in conjunction with the tunability enabled by electric and magnetic biasing paves the way for designing miniaturized nonreciprocal devices in the infrared.