Parity-time symmetry breaking in optically coupled semiconductor lasers

Joseph S. Suelzer; Yogesh N. Joglekar; Gautam Vemuri

doi:10.1117/12.2239487

16 September 2016 Parity-time symmetry breaking in optically coupled semiconductor lasers

Joseph S. Suelzer, Yogesh N. Joglekar, Gautam Vemuri

Proceedings Volume 9920, Active Photonic Materials VIII; 99201M (2016) https://doi.org/10.1117/12.2239487
Event: SPIE Nanoscience + Engineering, 2016, San Diego, California, United States

Abstract

We experimentally demonstrate the realization of a parity-time (PT) symmetry breaking in optically coupled semiconductor lasers (SCLs). The two SCLs are identical except for a detuning between their optical emission frequencies. This detuning is analogous to the gain-loss parameter found in optical PT systems. To model the coupled SCLs, we employ the standard rate equations describing the electric field and carrier inversion of each SCL, and show that, under certain conditions, the rate equations reduce to the canonical, two-site PT- symmetric model. This model captures the global behavior of the laser intensity as the system parameters are varied. Overall, we find that this bulk system (coupled SCLs) provides an excellent test-bed to probe the characteristics of PT-breaking transitions, including the effects of time delay.

Conference Presentation

Citation Download Citation

Joseph S. Suelzer, Yogesh N. Joglekar, and Gautam Vemuri "Parity-time symmetry breaking in optically coupled semiconductor lasers", Proc. SPIE 9920, Active Photonic Materials VIII, 99201M (16 September 2016); https://doi.org/10.1117/12.2239487

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