High Performance Electrically‐Injected InGaN Microdisk Lasers through Simultaneous Enhancement of Optical Confinement and Overlap Factor (Laser Photonics Rev. 18(8)/2024)

High Q, room-temperature lasing in InGaN microdisk lasers under electrical injection is achieved through a thin-film structure enhanced by a metallic undercut, which substantially improves optical confinement and overlap factor. Detailed analysis using near-field optical spectroscopy reveals strain relaxation near the edge plays a crucial role in reducing the Quantum Confined Stark Effect. This improvement in quantum efficiency has significant implications for the enhancement of lasing performance. For more details, see article number <a href="https://doi.org/10.1002/lpor.202400047">2400047</a> by Wai Yuen Fu, Yuk Fai Cheung, and Hoi Wai Choi.<br>