Efficient polarization emission from metasurface-integrated resonant cavity light-emitting diodes

Abstract The pursuit of advanced illumination and display technologies has driven the development of beam manipulation for GaN micro-sized light-emitting diodes (LEDs). To realize an efficient polarization emission light source, we propose metasurface-integrated resonant cavity light-emitting diodes (RCLEDs), incorporating a dual-layer embedded photonic crystal (PhC) within the GaN cavity, and placing a resonant-cavity reflector (RCR) on top of the existing distributed Bragg reflector (denoted as PhC-RCR-RCLED). Numerical simulations reveal a significant enhancement in emission efficiency along with an improved ability to manipulate the emission beams. The averaged transmittance, deflection efficiency, and collection efficiency at the central wavelength for both x- and y-polarizations are 66.9%, 79.6%, and 53.6%, respectively. Compared to the traditional RCLED, our PhC-RCR-RCLED achieves 5.3, 1.2, and 6.3 times enhancements in these three efficiencies. Our scheme paves the way for more efficient and controllable light sources.