Graphene-based metamaterial absorber for energy harvesting in the Terahertz range

An optimal energy harvesting absorber requires exceptional characteristics such as perfect absorbance, broad bandwidth, and a tunable resonant frequency. In the pursuit of highly effective energy harvesting in the terahertz regime, a novel graphene-based absorber with broadband tunability is introduced. This novel and simple design demonstrate flawless absorption across an extensive bandwidth of 2 THz for both transverse magnetic and transverse electric polarization states, signifying its polarization insensitivity. Rigorous numerical simulations substantiate the asserted qualities of high absorption, broad bandwidth, and tunability. The absorber’s inherent tunability empowers the selective absorption of electromagnetic energy, facilitating extraction by a coupled energy harvesting device.