Vacuum-induced suppression and enhancement of four-wave mixing in an optical cavity

作者：Chen Haixia; Wang Xiuxiu; Ahmed Irfan; Yao Xin; Wu Zhenkun; Zhu Dayu; Zhang Yanpeng^*

来源：Applied Physics B: Lasers and Optics , 2015, 120(4): 765-771.

DOI：10.1007/s00340-015-6194-x

We report on an experimental study of vacuum-induced suppression and enhancement of four-wave mixing (FWM) signal in a composite atom-cavity system. By scanning the additional dressing field, the suppression ratio of the FWM signal can reach 90 % compared with 40 % without cavity. We attribute the enhanced suppression and enhancement to the atom-cavity coupling arising from a vacuum-induced Raman process, which amplifies the dressing effect from the additional field. Also, the dressing asymmetry of the atom-cavity coupling is discussed and used to estimate the nonlinearity of atomic medium in the cavity. The suppression and enhancement can be interpreted by a dressed-state picture and agree with theoretical calculations. The investigation may find applications in optical switch and quantum memory controlled by cavity.

• 出版日期2015-9
• 单位西安交通大学