1. Approach to Single-Mode Dominated Resonant Emission in GaN-Based Square Microdisks on Si*
- Author
-
Bin Liu, Zili Xie, Liyang Zhang, Xiangqian Xiu, Peng Chen, Menghan Liu, Ping Han, Youdou Zheng, Dunjun Chen, Yi Shi, Rong Zhang, and Kai Cheng
- Subjects
Materials science ,Single-mode optical fiber ,General Physics and Astronomy ,Atomic physics ,Square (algebra) - Abstract
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.
- Published
- 2020