Beam manipulating by graphene-based metasurface transmit-array

Considering graphene metasurfaces as shunt admittance sheets, we propose a transmit-array configuration which can mold incident beam by modulating wavefront phase and amplitude. Thanks to the exceptional properties of graphene ribbons such as tunablity, one-atom thickness, low loss, and high confinement, the proposed subwavelength structure passes the strict touchstones for nano-photonic and opto-electronic applications. Light processing functionalities such as focusing and bending are realized which demonstrate superior features of graphene-plasmonic devices over their conventional dielectric-based counterparts.