| ATOMIC AND MOLECULAR PHYSICS |
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Momentum Spectroscopy for Multiple Ionization of Cold Rubidium in the Elliptically Polarized Laser Field |
| Junyang Yuan1,2,3, Yixuan Ma1,2,3, Renyuan Li1,2, Huanyu Ma1,2,3, Yizhu Zhang1,4, Difa Ye5, Zhenjie Shen1, Tianmin Yan1**, Xincheng Wang3**, Matthias Weidemüller6,7,8, Yuhai Jiang1,2,3,7** |
1Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210
2University of Chinese Academy of Sciences, Beijing 100049
3School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210
4Center for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering, Key Laboratory of the Ministry of Education, Tianjin University, Tianjin 300072
5Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100088
6Hefei National Laboratory for Physical Sciences at the Microscale and Shanghai Branch, University of Science and Technology of China, Shanghai 201315
7CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315
8Physikalisches Institut, Universität Heidelberg, Im Neuenheimer Feld 226, 69120 Heidelberg, Germany
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| Cite this article: |
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Junyang Yuan, Yixuan Ma, Renyuan Li et al 2020 Chin. Phys. Lett. 37 053201 |
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Abstract Employing recently developed magneto-optical trap recoil ion momentum spectroscopy (MOTRIMS) combined with cold atoms, strong laser pulse, and ultrafast technologies, we study momentum distributions of the multiply ionized cold rubidium (Rb) induced by the elliptically polarized laser pulses (35 fs, $1.3\times 10^{15}$ W/cm$^{2}$). The complete vector momenta of Rb$^{n+}$ ions up to charge state $n = 4$ are recorded with extremely high resolution (0.12 a.u. for Rb$^{+}$). Variations of characteristic multi-bands are displayed in momentum distributions because the ellipticity varies from the linear to circular polarization, are interpreted qualitatively with the classical over-barrier ionization model. Present momentum spectroscopy of cold heavy alkali atoms presents novel strong-field phenomena beyond the noble gases.
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Received: 10 February 2020
Published: 25 April 2020
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| PACS: |
32.80.Fb
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(Photoionization of atoms and ions)
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34.50.Fa
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(Electronic excitation and ionization of atoms (including beam-foil excitation and ionization))
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32.80.Qk
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(Coherent control of atomic interactions with photons)
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| Fund: Supported by the National Natural Science Foundation of China (Grant Nos. 11827806, 11874368, 61675213, 11822401, and 11674034). |
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