Single-mode laser by parity-time symmetry breaking
University of California, Berkeley · Lawrence Berkeley National Laboratory
Abstract
Effective manipulation of cavity resonant modes is crucial for emission control in laser physics and applications. Using the concept of parity-time symmetry to exploit the interplay between gain and loss (i.e., light amplification and absorption), we demonstrate a parity-time symmetry-breaking laser with resonant modes that can be controlled at will. In contrast to conventional ring cavity lasers with multiple competing modes, our parity-time microring laser exhibits intrinsic single-mode lasing regardless of the gain spectral bandwidth. Thresholdless parity-time symmetry breaking due to the rotationally symmetric structure leads to stable single-mode operation with the selective whispering-gallery mode order.…
Citation impact
- FWCI
- 64.51
- Percentile
- 100%
- References
- 33
Authors
5- LFLiang FengCorresponding
University of California, Berkeley
- ZJZi Jing Wong
University of California, Berkeley
- RMRen‐Min Ma
University of California, Berkeley
- YWYuan Wang
Lawrence Berkeley National Laboratory, University of California, Berkeley
- XZXiang Zhang
Lawrence Berkeley National Laboratory, University of California, Berkeley
Topics & keywords
- Lasing threshold
- Parity (physics)
- Laser
- Physics
- Symmetry breaking
- Optics
- Optical cavity
- Optoelectronics
- Affordable and clean energy