2020/11/04 by Ensiye Ghorbanpour, Ghorbanpour, Ensiye, Sahar Behroozinia +3
Engineering · Materials Science · Physics and Astronomy · #Absorption (acoustics) #Beam (structure) #Beam steering #Coherent control #Computer science #FOS: Physical sciences #Fabrication #Graphene #Laser #Liquid Crystal Research Advancements #Materials science #Metamaterials and Metasurfaces Applications #Nanotechnology #Optics #Optics (physics.optics) #Optoelectronics #Physics #Planar #Plasmonic and Surface Plasmon Research #Reconfigurability #Retroreflector #Telecommunications #physics.optics
paper · pdf · doi:10.48550/arxiv.2011.02527
12 pages, 4 figures
openalex publication_date 2020/11/04 · arxiv created 2020/11/10 · arxiv updated 2020/11/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this paper, we exploit the metagrating paradigm to achieve coherent control of absorption and reflection in a two-port device. Employing graphene ribbon as a tunable element allows us to, for the first time, realize a reconfigurable metagrating that integrates diversified coherent functionalities into a single planar structure. It is illustrated that the suggested design can behave as a coherent perfect absorber at multiple operating incident angles offered by its period-reconfigurability. Besides, our proposed metagrating is also capable of highly-efficient dynamic beam steering based on the coherent interaction of light with light through finely adjusting its chemical potentials, and its compatibility is then investigated to realize linear all-optical logic gates. Moreover, we use the idea of graphene-based metagrating to put forward an extremely asymmetrical device which exhibits high retroreflection upon illumination from one side and a strong absorption under excitation from the opposite side, revealing a great enhancement in design and fabrication simplicity compared to the previous works. The EM response of our suggested device can also be switched from a strongly asymmetric to a symmetric behavior by merely modulating the chemical potentials of its graphene ribbons.