A modulated broadband polarimetric insensitive metamaterial absorber based on a monolayer of graphene

Abstract This paper presents a tunable and polarization-insensitive wideband metamaterial absorber based on single-layer graphene. By comparing the simulated experimental data with theoretical derivations, it was found that the absorbance of the material can be sustained above 90% in the frequency range of 2.78 to 7.14 (4.36) THz, of which the absorption rate exceeds 99% in the frequency range of 4.1–4.54 (0.44) THz, and remarkably, perfect absorption is achieved at 4.32 THz. In the range of 2.78–7.14 THz, the average absorption rate is 96.1%, by adjusting the physical size of the graphene layer pattern, we can modify the working band gap of the absorber. By applying a voltage to modulate the Fermi level of…