Plasmonic Antennas Based on Rectangular Graphene Nanoribbons with Controlled Polarization of Terahertz and IR Radiation

Abstract

To develop new 6G and beyond terahertz (THz) wireless communication systems with the high-throughput and data rate, the direction of polarization of emitted THz waves should be effectively controlled, whereas most methods are technologically complex and expensive. The implementation of THz antennas and devices based on 2D materials, e.g., graphene, solves the problem of the effective control. The possibility is studied of controlling the polarization of THz and IR radiation of plasmonic antennas based on rectangular graphene nanoribbons by changing the chemical potential (applying an external electric field). This important scientific problem related to the design of THz antennas can largely be solved by modeling in the CST MWS 2023 electrodynamic modeling program. Plasmon THz antennas based on rectangular graphene nanoribbons have been chosen as objects of study and the possibility of emitting waves of two orthogonal polarizations has been shown. Methods for controlling the polarization of THz and IR radiation of such antennas have been identified, which are based on choosing the operating frequencies corresponding to the plasmon resonances of the surface plasmon-polariton modes and metallization of a dielectric substrate. The possibility of controlling the polarization of THz and IR radiation allows the creation of both new elements of plasmonic antenna arrays and new communication technologies, including future 6G networks.