A perfect absorber made of a graphene micro-ribbon metamaterial

TL;DR

This paper demonstrates the design of a perfect absorber using graphene micro-ribbons in a metamaterial structure, achieving complete absorption through a simple Fabry-Perot model explanation.

Contribution

It introduces a novel graphene-based metamaterial perfect absorber with a straightforward Fabry-Perot model for explanation.

Findings

Achieves complete absorption of incident energy

Uses graphene flakes as building blocks for absorbers

Explains functionality with a Fabry-Perot model

Abstract

Metamaterial-based perfect absorbers promise many applica- tions. Perfect absorption is characterized by the complete suppression of transmission and reflection and complete dissipation of the incident energy by the absorptive meta-atoms. A certain absorption spectrum is usually assigned to a bulk medium and serves as a signature of the respective material. Here we show how to use graphene flakes as building blocks for perfect absorbers. Then, an absorbing meta-atom only consists of a molecular monolayer placed at an appropriate distance from a metallic ground plate. We show that the functionality of such device is intuitively and correctly explained by a Fabry-Perot model.