Single mode parity-time laser

Zi Jing Wong; Liang Feng; Ren-Min Ma; Yuan Wang; Xiang Zhang

doi:10.1117/12.2188935

1 September 2015 Single mode parity-time laser

Zi Jing Wong, Liang Feng, Ren-Min Ma, Yuan Wang, Xiang Zhang

Proceedings Volume 9546, Active Photonic Materials VII; 95460Z (2015) https://doi.org/10.1117/12.2188935
Event: SPIE Nanoscience + Engineering, 2015, San Diego, California, United States

Abstract

The concept of parity-time (PT) symmetry exploits the interplay between the material loss and gain to attain novel optical phenomena such as exceptional point and unidirectional light propagation. Here we experimentally demonstrate a PT symmetry breaking laser that allows unique control of the resonant modes. In contrast to conventional ring cavity lasers with multiple competing modes, our on-chip InGaAsP/InP based PT 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 at the specific whispering gallery mode order.

Conference Presentation

Citation Download Citation

Zi Jing Wong, Liang Feng, Ren-Min Ma, Yuan Wang, and Xiang Zhang "Single mode parity-time laser", Proc. SPIE 9546, Active Photonic Materials VII, 95460Z (1 September 2015); https://doi.org/10.1117/12.2188935

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