Graphene-based polaritonic crystal

TL;DR

This paper demonstrates that a monolayer graphene on a periodic gate acts as a polaritonic crystal with tunable band structure, exhibiting Fano resonances in electromagnetic scattering, advancing understanding of graphene-based photonic devices.

Contribution

It introduces the concept of a graphene-based polaritonic crystal with voltage-tunable band structure and analyzes its electromagnetic scattering properties.

Findings

Graphene on a periodic gate forms a polaritonic crystal.

The band structure can be controlled by gate voltage.

Fano resonances are observed in scattering spectra.

Abstract

It is shown that monolayer graphene deposited on a spatially-periodic gate behaves as a polaritonic crystal. Its band structure depending on the applied gate voltage is studied. The scattering of electromagnetic radiation from such a crystal is presented calculated and analyzed in terms of Fano-type resonances between the reflected continuum and plasmon-polariton modes forming narrow bands.