Numerical Investigation of the Modulation Efficiency of Terahertz Waves Transmitted Through a Graphene Metasurface with Combined Electric and Magnetic Control

Using MWS CST software, the diffraction of a normally incident TEM p-polarized wave on a graphene nanoribbon metasurface with combined electric and magnetic control is simulated with a bias magnetic field applied perpendicularly to the graphene. The frequency dependences of the modulus of the transmission coefficient of the p-polarized TEM wave through graphene nanoribbon-based metasurfaces are calculated for different values of the Fermi level EF and the induction В0 of a bias magnetic field in the THz and far IR frequency ranges. It is shown that the frequency modulation index and the maximum values of the change in the transmission coefficient through the graphene metasurface increase with an increase in the magnetic induction В0 of the applied external bias magnetic field and with a decrease in the Fermi level EF in the optimal interval of EF variation (0.2–0.35 eV).