A five biases, three layers graphene basedTHzabsorber: Exploiting dual bias periodic arrays of grapheme ribbons

Abstract

Wave absorbers are considered main operational block for light manipulation. Numerous optical and electromagnetic systems can be realized via wave absorbers such as wave modulators, filters, and detectors. Here in this work, a highly tunable wave absorber is proposed, which includes three layers of grapheme patterns on dielectric. While whole device is placed on top of a relatively thick metallic reflector. Leveraging dual bias scheme for periodic arrays of grapheme ribbons and exploiting impedance matching concept give the opportunity to adjust absorption response via external bias voltages. All consisting parts of the device are modeled by passive circuit elements include resistor, inductor, and capacitor. Compared to conventional methods of full wave numerical modeling like finite element methods, the presented design methodology requires less CPU time and occupied memory. According to the simulation results, proposed wave absorber shows a multi‐band absorption with four peaks, which make it perfect choice for several application from medical imaging to indoor communication.