Deterministic approach to design passive anomalous-diffraction metasurfaces with nearly 100% efficiency.

ABSTRACT: Designing perfect anomalous reflectors is crucial for achieving many metasurface-based applications, but available design approaches for the cases of extremely large bending angles either require unrealistic gain-loss materials or rely on brute-force optimizations lacking physical guidance. Here, we propose a deterministic approach to design passive metasurfaces that can reflect impinging light to arbitrary nonspecular directions with almost 100% efficiencies. With both incident and out-going far-field waves given, we can retrieve the surface-impedance profile of the target metadevice by matching boundary conditions with all allowed near-field modes added self-consistently and then construct the metadevices deterministically based on passive meta-atoms exhibiting local

SUBMITTER: Fang Z 

PROVIDER: S-EPMC11501116 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature