Achiral light-controlled coding metasurfaces with multi-channel electromagnetic control

Programmable digital coding metasurfaces (PDCMs) can manipulate electromagnetic waves with high degrees of freedom, significantly enriching metasurface designs. However, most PDCMs are limited to the control of a single polarization, which cannot meet the requirements of the high integration of intelligent components. To further improve the practicability and flexibility of metasurfaces, we propose an integrated paradigm for spin-decoupling PDCMs based on light emitting diode arrays that fully embed the photoresistor as a part of the meta-atom to independently manipulate the wavefront in different polarizations. As a proof of concept, PDCMs were simulated, fabricated, and measured to verify the feasibility and effectiveness of the proposed method. The functions of scattering and vortices are verified at different polarizations, demonstrating that the metasurface can tailor the EM functions in six channels. This study can improve the integration of intelligent control metasurfaces and lay a solid foundation for their development.