Optimization of dispersion angle of resonant cavity light-emitting diode based on multilayer DBR and microlens structure

The paper investigates methods to reduce the light emission divergence angle in resonant cavity light-emitting diodes (RCLEDs) using a multilayer distributed Bragg reflector (DBR) and a microlens (ML) structure. By integrating staggered multiple quantum wells (SMQWs) and nanoporous DBRs, the study explores the effects of adjusting DBR cycles and adding microlenses. The results show that these approaches significantly reduce the emission angle, enhancing wavelength stability and device performance. This optimization is valuable for applications requiring highly directional light, such as optical communications, micro-LED displays, and augmented reality (AR).