Author(s): Zhao, LX (Zhao, Lixia); Chen, JW (Chen, Jiawei); Lin, S (Lin, Shan); Huang, YQ (Huang, Yuqing); Ge, XT (Ge, Xiaotian); Wang, T (Wang, Ting); Hu, TG (Hu, Tiangui); Ding, SA (Ding, Sunan); Wang, KY (Wang, Kaiyou)

Source: ADVANCED ELECTRONIC MATERIALS DOI: 10.1002/aelm.202300781  Early Access Date: FEB 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.

Single-mode lasing of whispering gallery mode (WGM) lasers is very important for on-chip integrated systems. Here, by designing a micro-ring laser with lateral nanoporous distributed Bragg reflector (DBR), single-mode lasers are achieved. The DBR structure enhances the light confinement in the vertical direction and the presence of the inner diameter of the micro-ring suppresses the generation of high-order modes. image

Accession Number: WOS:001173234400001

ISSN: 2199-160X