Graphene-dielectric metamaterial for beam steering

This work presents the designs of tunable mid-infrared (MIR) beam steering devices based on multilayer graphene-dielectric metamaterials. A tunable beam steering is achieved by changing the chemical potential of each graphene layer and, therefore, the effective refractive index of the metamaterial. Three different beam steerer concepts with a wide range of output angles (up to approximately 70°) are discussed. The proposed graphene-based tunable beam steering can be used in tunable transmitter/receiver modules for infrared imaging and sensing.