Tunable graphene-based polarizer

TL;DR

This paper demonstrates a graphene-based attenuated total reflection structure that acts as a tunable polarizer by controlling the polarization angle through applied voltage, leveraging surface plasmon-polariton resonance.

Contribution

It introduces a novel tunable polarizer design using graphene and external voltage control to manipulate polarization via surface plasmon resonance.

Findings

Reflected wave is nearly 100% s-polarized at resonance.

Polarization angle is adjustable by voltage applied to graphene.

The mechanism relies on resonant coupling to surface plasmon-polaritons.

Abstract

It is shown that an attenuated total reflection structure containing a graphene layer can operate as a tunable polarizer of the electromagnetic radiation. The polarization angle is controlled by adjusting the voltage applied to graphene via external gate. The mechanism is based on the resonant coupling of $p-$polarized electromagnetic waves to the surface plasmon-polaritons in graphene. The presented calculations show that, at resonance, the reflected wave is almost 100% $s-$polarized.