Optics Express

Cavity-enhanced optical controlling based on three-wave mixing in cavity-atom ensemble system

Xinxin Hu, Changling Zhao, Zhu-Bo Wang, Yan‐Lei Zhang, Xu‐Bo Zou, Chun‐Hua Dong, Hong X. Tang, Guang‐Can Guo, Chang‐Ling Zou

Published Feb 21, 2019• 6 citations

Publisher

Abstract

Cavity-enhanced optical controlling is experimentally observed with a low-control laser power in a cavity-atom ensemble system. Here, the three-level atoms are coupled with two optical modes of a Fabry-Perot cavity, where a new theoretical model is developed to describe the effective three-wave mixing process between spin-wave and optical modes. By adjusting either temperature or cavity length, we demonstrate the precise frequency tuning of the hybrid optical-atomic resonances. When the doubly-resonant condition is satisfied, the probe laser can be easily modulated by a control laser. In addition, interesting non-Hermitian physics are predicted theoretically and demonstrated experimentally, and all-optical switching is also achieved. Such a doubly-resonant cavity-atom ensemble system without a specially designed cavity can be used for future applications, such as optical signal storage and microwave-to-optical frequency conversion.

DOI: 10.1364/oe.27.006660

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