Dephasing of ultracold cesium 80D<sub>5/2</sub>-Rydberg Electromagnetically Induced Transparency

POSTER

Abstract

We study Rydberg electromagnetically induced transparency (EIT) of a cascade three-level atom involving 80D5/2 state in a strong interaction regime employing a cesium


ultracold cloud. In our experiment, a strong coupling laser couples 6P3/2 to 80D5/2 transition, while a weak probe, driving 6S1/2 to 6P3/2 transition, probes the coupling induced EIT signal. At the two-photon resonance, we observe that the EIT transmission decreases slowly with time, which is a signature of interaction induced metastability. The dephasing rate rOD is extracted with optical depth OD = rOD. We find that the optical depth linearly increases with time at onset for a


fixed probe incident photon number Rin before saturation. The dephasing rate shows a nonlinear dependence on Rin. The dephasing mechanism is mainly attributed to the strong Rydberg interactions and simulated with density matrix equation.

*Supported by the National Nature Science Foundation of China (Grant Nos. 61835007, 12120101004, 62175136, 12104337, 11904104, 12274131), the scientific cooperation exchanges project of Shanxi province (Grant No. 202104041101015).

Presenters

  • Jianming Zhao

    • Institute of laser spectrosocpy

Authors

  • Jianming Zhao

    • Institute of laser spectrosocpy

  • Yuechun Jiao

    • Institute of laser spectroscopy
    • Institute of Laser spectroscopy, Shanxi University, Taiyuan, China

  • Zhengyang Bai

    • State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
    • State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, People's Republic of China

  • Weibin Li

    • School of Physics and Astronomy and Centre for the Mathematics and Theoretical Physics of Quantum Non-equilibrium Systems, University of Nottingham, Nottingham, NG7 2RD, UK