TUNEABLE GRAPHENE METAMATERIAL ABSORBERS: TAILORING ABSORPTION WITH FERMI ENERGY

Abstract

This paper explores the design of graphene-based metamaterial absorbers for electromagnetic waves using a surface conductivity approach. We propose a novel design utilizing circular graphene patches on a substrate with a refractive index of 2.0. We investigate the impact of varying Fermi energies within the graphene on both the absorption properties and the effective surface conductivity of the metamaterial. Our findings demonstrate the ability to achieve tunable absorption characteristics, including narrowband and broadband regimes, by manipulating the Fermi energy of the graphene patches. This research paves the way for the development of graphene- based metamaterial absorbers with tailored absorption properties for various applications.