Approach to Single-Mode Dominated Resonant Emission in GaN-Based Square Microdisks on Si

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2020,（5）
• 页码范围: 59-63
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/0256-307X/37/5/054204

摘要

Square microdisks with round corners are fabricated using a standard GaN-based blue LED on Si substrates.Whispering gallery-like modes in the square microdisks are investigated by finite-difference time-domain simulation.The simulation results reveal that the round corners in square microdisks can substantially suppress the number of light propagation paths and further reduce the number of optical modes.A confocal micro-photoluminescence is performed to analyze the optical properties of the square microdisks at room temperature.The single-mode dominant resonant emission is obtained in the square microdisk with corner radius of 1.5 μm.