Abstract
We study theoretically a parity-time ()-symmetric, saturable, balanced gain–loss system in a ring-cavity configuration. The saturable gain and loss are modeled by a two-level medium with or without population inversion. We show that the specifics of the spectral singularity can be fully controlled by the cavity and the atomic detuning parameters. The theory is based on the mean-field approximation, as in the standard theory of optical bistability. Further, in the linear regime we demonstrate the regularization of the singularity in detuned systems, while larger input power levels are shown to be adequate to limit the infinite growth in absence of detunings.
© 2014 Optical Society of America
Full Article | PDF ArticleMore Like This
Sendy Phang, Ana Vukovic, Hadi Susanto, Trevor M. Benson, and Phillip Sewell
Opt. Lett. 39(9) 2603-2606 (2014)
Guoqing Yang, Zheng Tan, Bichen Zou, and Yifu Zhu
Opt. Lett. 39(23) 6695-6698 (2014)
Xiaojun Cheng, Yitzchak Lockerman, and Azriel Z. Genack
Opt. Lett. 39(11) 3348-3351 (2014)