Beam steering using graphene-based magnetic resonator

摘要

We propose an active metasurface based on graphene magnetic resonator in reflection mode. The reflection angle is controlled by the phase gradient, which can be tuned by engineering the Fermi level distribution in the super-cell along the metasurface. By changing the period of the super-cell from n = 4 to n = 8 (thus the phase gradient of the metasurface), the beam direction is steered approximately from θ = 51° to θ = 23°. The simulation results agree well with the calculated results given by the generalized Snell's law, demonstrating the possibility of dynamic beam steering base on the proposed metasurface.