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  • Letter

Generation of metastable krypton using a 124-nm laser

X.-Z. Dong, F. Ritterbusch*, D.-F. Yuan, J.-W. Yan, W.-T. Chen, W. Jiang, Z.-T. Lu†, J. S. Wang, X.-A. Wang‡ et al.

G.-M. Yang

  • University of Science and Technology of China, 96 Jinzhai Road, Hefei 230026, China

  • *florian@ustc.edu.cn
  • †ztlu@ustc.edu.cn
  • ‡xawang@ustc.edu.cn
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Phys. Rev. A 105, L031101 – Published 9 March, 2022

DOI: https://doi.org/10.1103/PhysRevA.105.L031101

Abstract

We have realized the optical excitation of krypton to a metastable level with an efficiency as high as 23% using near-resonant 124-nm light produced by four-wave mixing in mercury vapor. Self-absorption in mercury is circumvented by adjusting the detuning and phase matching according to experimental and theoretical characterizations. Density-matrix calculations of the metastable krypton generation agree with the measured dependencies of the excitation efficiency, indicating pathways towards a further improvement. The obtained excitation efficiency, being one order of magnitude higher than that of previously demonstrated techniques, enables an extension of the metastable density regime for atomic physics applications, including magnetometry, atom lithography, and radioisotope dating.

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Phys. Rev. A 105, L031101– Published 9 March, 2022
  • Received 15 June 2021
  • Accepted 18 February 2022
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