# Graphene-based Perfect Absorbers: Systematic Design and High Tunability

## TL;DR

This paper presents a systematic design of graphene-based perfect absorbers using metallic metasurfaces, achieving high tunability and complete absorption across frequencies despite low carrier mobility in processed graphene.

## Contribution

It introduces a metasurface-based approach to enhance absorption in low-mobility graphene, enabling tunable and complete absorption in the THz band.

## Key findings

- Complete absorption achieved at various frequencies.
- Strong tunability of absorption with Fermi level modulation.
- Metasurface design compensates for low mobility issues.

## Abstract

Experimental realization of efficient graphene-based absorbers is a challenging task due to the low carrier mobility in processed graphene. In this paper, we circumvent this problem by placing uniform graphene sheets on metallic metasurfaces designed for improving the absorption properties of low-mobility graphene. Complete absorption can be achieved for different frequencies with the proper metasurface design. In the THz band, we observe strong tunability of the absorption frequencies and magnitudes when modulating graphene Fermi level.