Manipulation of Giant Faraday Rotation in Graphene Metasurfaces

TL;DR

This paper demonstrates how nano-patterning of graphene metasurfaces can manipulate and enhance giant Faraday rotation effects up to 6THz, combining physical modeling and full-wave simulations.

Contribution

It introduces a method to control and enhance Faraday rotation in graphene metasurfaces through nano-patterning, extending the frequency range and precision of the effect.

Findings

Giant Faraday rotation up to 6THz achieved

Patterning significantly influences rotation magnitude

Physical model accurately predicts pattern effects

Abstract

Faraday rotation is a fundamental magneto-optical phenomenon used in various optical control and magnetic field sensing techniques. Recently, it was shown that a giant Faraday rotation can be achieved in the low-THz regime by a single monoatomic graphene layer. Here, we demonstrate that this exceptional property can be manipulated through adequate nano-patterning, notably achieving giant rotation up to 6THz with features no smaller than 100nm. The effect of the periodic patterning on the Faraday rotation is predicted by a simple physical model, which is then verified and refined through accurate full-wave simulations.