High-efficiency polarized GaN light-emitting diode based on asymmetric metal nanograting metasurfaces

We have designed and fabricated a polarization light-emitting diode (LED) utilizing asymmetric nanograting metasurfaces, characterized by distinct grating structures on the top and bottom surfaces.Experimental results indicate a 34.66% improvement in polarization light extraction efficiency within ±60° relative to traditional metal-coated sapphire substrates.The measured average extinction ratio surpasses 21.62 dB within this angular range.By incorporating a half-wave plate function at the bottom through asymmetric nanograting metasurfaces, this LED design streamlines fabrication processes, reduces complexity, and enhances the efficiency of linearly polarized light.This innovative approach presents a promising solution for micro-LED failure analysis, advanced optical displays, communication systems, and photonic computing applications.