▎ 摘　　要

A fractal shaped metasurface inspired graphene-based absorber is proposed in this paper for THz range application. The space-filling property of the Haferman carpet pattern is utilized to realize the shape of the graphene layer deposited on a dielectric layer with a metallic ground that is found to exhibit improved absorbance compared to the Euclidean shaped absorber counterparts. The resonating structure is made up of a graphene layer based on a second iteration Haferman Carpet fractal geometry that constitutes the unit cell of the metasurface. The absorbance is polarization independent for normal incidence. The efficacy of the absorber has been studied for various chemical potentials that render the tunability. Comprehensive discussions on the obtained results are presented by using numerical simulation to determine the electric field distributions and the absorption spectra. Over 90% absorbance is observed for the frequency range of 7.66 THz to 9.025 THz, resulting in a bandwidth of 1.365 THz. Therefore, these graphene-based Haferman carpet fractal shaped THz absorbers can be vastly used in high-performance THz devices, electro-optical switches and bio-sensors.