Electro-Optics of Current-carrying Graphene

TL;DR

This paper theoretically investigates how a steady DC current in doped graphene can induce significant, tunable Kerr rotations in its electro-optical response, especially in the mid-infrared range.

Contribution

It provides a comprehensive theoretical analysis including full conductivity tensor calculations for current-carrying graphene, revealing large, tunable Kerr effects.

Findings

Moderate DC current induces large Kerr rotations.

Kerr rotation frequency range can be tuned up to mid-infrared.

Full conductivity tensor considered for accurate response modeling.

Abstract

Electro-optical response of a current-carrying monolayer graphene is studied theoretically. Our calculation takes into account full (diagonal and non-diagonal) conductivity tensor obtained from a particle-conserving out-of-equilibrium distribution function of doped graphene. Our analytical and numerical results indicate that the presence of a moderate DC current throughout a doped graphene channel induces large Kerr rotations within a frequency range which can be tuned up to the mid-infrared frequency range.