Thesis name: Design and Fabrication of Reconfigurable Photonic Metasurface-Based Graphene Optical Antennas.

Abstract: Design reconfigurable photonic metasurface-based graphene optical antennas using COMSOL Multiphysics and investigating their performance for mid-infrared (12.7µm) beam steering and beam focusing applications. The tunable Fermi energy of graphene is exploited to reconfigure the photonic metasurface and used for beam steering and beam focusing applications. For beam steering, the metasurface was designed with two different numbers of graphene antennas. The electric field distribution and the radiation pattern showed that the metasurface can steer the reflected wave as  a single beam and three beams at different steering angles with a high gain. For beam focusing, the metasurface works as a metalens with three capabilities: tunable focus, focusing shift, and double focus. Then, this reconfigurable metasurface was fabricated to validate its practical performance.