Design of a Multi-Band Tunable Terahertz Absorber based on Graphene Metamaterials

Abstract

We propose a new multi-band tunable terahertz absorber based on graphene metamaterials. The proposed absorber consists of patterned graphene and a metallic plate separated by a dielectric layer. Numerical simulation indicates that the absorption peaks reach 99.9%, 97.8% and 99.7% at 0.478THz, 1.466THz and 2.439THz, respectively. By tuning the graphene chemical potential from 0eV to 1.leV, the amplitude of absorption peaks can be manipulated. These characteristics can find great potential applications in switching, sensing, and optoelectronic devices in the terahertz (THz) regime.