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Proceedings Article

Parity-time symmetry breaking in optically coupled semiconductor lasers

[+] Author Affiliations
Joseph S. Suelzer

Air Force Research Lab. (United States)

Yogesh N. Joglekar, Gautam Vemuri

Indiana Univ.-Purdue Univ. Indianapolis (United States)

Proc. SPIE 9920, Active Photonic Materials VIII, 99201M (September 16, 2016); doi:10.1117/12.2239487
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From Conference Volume 9920

  • Active Photonic Materials VIII
  • Ganapathi S. Subramania; Stavroula Foteinopoulou
  • San Diego, California, United States | August 28, 2016

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. © (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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 (September 16, 2016); doi:10.1117/12.2239487; http://dx.doi.org/10.1117/12.2239487


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