Tunable deep-subwavelength superscattering using graphene monolayers

TL;DR

This paper proposes using tunable graphene monolayers to significantly enhance scattering from deep-subwavelength dielectric cylinders, enabling dynamic control of superscattering across a wide terahertz frequency range.

Contribution

It introduces a novel graphene-based superscatterer design that leverages plasmon resonance tunability for enhanced scattering at terahertz frequencies.

Findings

Scattering cross section increased by six orders of magnitude.

Resonance tunable via graphene's chemical potential.

Effective across several terahertz to tens of terahertz.

Abstract

In this Letter, we theoretically propose for the first time that graphene monolayers can be used for superscatterer designs. We show that the scattering cross section of the bare deep-subwavelength dielectric cylinder is markedly enhanced by six orders of magnitude due to the excitation of the first-order resonance of graphene plamons. By utilizing the tunability of the plasmonic resonance through tuning graphene's chemical potential, the graphene superscatterer works in a wide range of frequencies from several terahertz to tens of terahertz.