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Autler–Townes doublet in single-photon Rydberg spectra of cesium atomic vapor with a 319 nm UV laser

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Abstract

We demonstrate the single-photon excitation spectra of cesium Rydberg atoms by means of a Doppler-free purely all-optical detection with a room-temperature vapor cell and a 319 nm ultra-violet (UV) laser. We excite atoms directly from 6S1/2 ground state to 71P3/2 Rydberg state with a narrow-linewidth 319 nm UV laser. The detection of Rydberg states is performed by monitoring the absorption of an 852 nm probe beam in a V-type three-level system. With a strong coupling light, we observe the Autler–Townes doublet and investigate experimentally the dependence of the separation and linewidth on the coupling intensity, which is consistent with the prediction based on the dressed state theory. We further investigate the Rydberg spectra with an external magnetic field. The existence of non-degenerate Zeeman sub-levels results in the broadening and shift of the spectra. It has potential application in sensing magnetic field.

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Acknowledgements

This project is supported by the National Key Research and Development Program of China (2017YFA0304502), the National Natural Science Foundation of China (61475091 and 11774210) and the Fund for Shanxi “1331 Project” Key Subjects Construction (1331KSC).

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Authors and Affiliations

  1. State Key Laboratory of Quantum Optics and Quantum Optics Devices, Shanxi University, Taiyuan, 030006, Shanxi, China

    Jiandong Bai, Jieying Wang, Shuo Liu, Jun He & Junmin Wang

  2. Institute of Opto-Electronics, Shanxi University, Taiyuan, 030006, Shanxi, China

    Jiandong Bai, Jieying Wang, Shuo Liu, Jun He & Junmin Wang

  3. Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, 030006, Shanxi, China

    Jun He & Junmin Wang

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  1. Jiandong Bai
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  2. Jieying Wang
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Correspondence to Junmin Wang.

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Bai, J., Wang, J., Liu, S. et al. Autler–Townes doublet in single-photon Rydberg spectra of cesium atomic vapor with a 319 nm UV laser. Appl. Phys. B 125, 33 (2019). https://doi.org/10.1007/s00340-019-7151-x

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