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Proceedings Paper

Single mode parity-time laser
Author(s): Zi Jing Wong; Liang Feng; Ren-Min Ma; Yuan Wang; Xiang Zhang
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Paper 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.

Paper Details

Date Published: 1 September 2015
PDF: 4 pages
Proc. SPIE 9546, Active Photonic Materials VII, 95460Z (1 September 2015); doi: 10.1117/12.2188935
Show Author Affiliations
Zi Jing Wong, Univ. of California, Berkeley (United States)
Liang Feng, Univ. of California, Berkeley (United States)
Ren-Min Ma, Univ. of California, Berkeley (United States)
Yuan Wang, Univ. of California, Berkeley (United States)
Lawrence Berkeley National Lab. (United States)
Xiang Zhang, Univ. of California, Berkeley (United States)
Lawrence Berkeley National Lab. (United States)


Published in SPIE Proceedings Vol. 9546:
Active Photonic Materials VII
Ganapathi S. Subramania; Stavroula Foteinopoulou, Editor(s)

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Single-mode-parity-time-laser



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