Achieving Giant Magneto-optic Effects with Optical Tamm States in Graphene-based Photonics

TL;DR

This paper demonstrates how optical Tamm states in graphene-based photonics can produce giant magneto-optical effects, notably a significant Faraday rotation, by leveraging interface modes for enhanced electromagnetic confinement.

Contribution

The study introduces a novel scheme to achieve large Faraday rotation in graphene photonics using interface modes, enabling high-performance magneto-optical devices.

Findings

Giant Faraday rotation achieved with a single graphene layer

Enhanced magneto-optical effects via interface mode confinement

High transmission maintained despite large rotation

Abstract

We manipulate optical Tamm states in graphene-based photonics to achieve and steer large magneto-optical effects. Here we report the presence of a giant Faraday rotation via a single graphene layer of atomic thickness while keeping a high transmission. The Faraday rotation is enhanced across the interface between two photonic crystals due to the presence of an interface mode, which presents a strong electromagnetic field confinement at the location of the graphene sheet. Our proposed scheme opens a promising avenue to realize high performance graphene magneto-optical devices that can be extended to other two-dimensional structures.