Zhao, Lixia; Chen, Jiawei; Lin, Shan; Huang, Yuqing; Ge, Xiaotian; Wang, Ting; Hu, Tiangui; Ding, Sunan; Wang, Kaiyou Source: Advanced Electronic Materials, 2024;

Abstract:

Whispering gallery mode (WGM) laser with single-mode is important for optoelectronic applications because of the higher stability during the light signal transmission. But till now, for InGaN-based WGM laser, most reports of lasing behavior are multimode lasing. To achieve single-mode WGM laser, an InGaN-based micro-ring laser is proposed and demonstrated with lateral nanoporous distributed Bragg reflector (DBR), where the high-order lasing modes are strongly suppressed. The side mode suppression ratio (SMSR) is more than 9 times larger than that of the micro-disk laser with the same radius. Combined with FDTD simulation, the results show that the enhancements are originated from the suppression of the high-order resonant mode because of the inner boundary of micro-ring. This work provides a new solution to achieve stable single-mode WGM laser for future photonic integration.

© 2024 The Authors. Advanced Electronic Materials published by Wiley-VCH GmbH. (36 refs.)