On-chip integrated exceptional surface microlaser
Kun Liao, Yangguang Zhong, Zhuochen Du, Guodong Liu, Chentong Li, Xianxin Wu, Chunhua Deng, Cuicui Lu, Xingyuan Wang, C. T. Chan, Qinghai Song, Shufeng Wang, Xinfeng Liu, Xiaoyong Hu, Qihuang Gong
Abstract
The on-chip integrated visible microlaser is a core unit of high-speed visible-light communication with huge bandwidth resources , which needs robustness against fabrication errors, compressible linewidth, reducible threshold, and in-plane emission . However, until now, it has been a great challenge to meet these requirements simultaneously. Here, we report a scalable strategy to realize a robust on-chip integrated visible microlaser with further improved lasing performances enabled by the increased orders ( n ) of exceptional surfaces, and experimentally verify the strategy by demonstrating the performances of a second-order exceptional surface–tailored microlaser. We further prove the potential application of the strategy by discussing an exceptional surface–tailored topological microlaser with unique performances. This work lays a foundation for further development of on-chip integrated high-speed visible-light communication and processing systems, provides a platform for the fundamental study of non-Hermitian photonics, and proposes a feasible method of joint research for non-Hermitian photonics with nonlinear optics and topological photonics.