Superheterodyne-inspired waveguide-integrated metasurfaces for flexible free-space light manipulation.

ABSTRACT: Metasurfaces have attracted significant attention in recent years due to their unprecedented light-manipulation abilities. However, most metasurfaces so far have relied on external light excitation, prohibiting them from full on-chip integration. Inspired by the superheterodyne principle in radio communications, here we propose a new waveguide-integrated metasurface architecture capable of converting in-plane guided modes into any desired out-of-plane free-space modes. A theoretical model, verified by simulation and experiment, is developed to provide a deep understanding of the involved physical mechanism and facilitate innovative metasurface designs. The judicious design of baseband signals allows the silicon-based superheterodyne metasurfaces to achieve complex light manipulations, incl

SUBMITTER: Wu GB 

PROVIDER: S-EPMC11501171 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature