| ATOMIC AND MOLECULAR PHYSICS |
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Wavelength Dependence of Atomic Excitation for Ar Subject to Intense Midinfrared Laser Pulses |
| Yang-Ni Liu1,2, Song-Po Xu2,4*, Mu-Feng Zhu2,3, Zheng-Rong Xiao2,3, Shao-Gang Yu2,4, Lin-Qiang Hua2,3, Xuan-Yang Lai2,3,4, Wei Quan2,3*, Wen-Xing Yang1*, and Xiao-Jun Liu2,3* |
1School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou 434022, China
2State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China
3School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
4Wuhan Institute of Quantum Technology, Wuhan 430206, China
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| Cite this article: |
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Yang-Ni Liu, Song-Po Xu, Mu-Feng Zhu et al 2023 Chin. Phys. Lett. 40 103201 |
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Abstract We report experimental and theoretical investigations of wavelength dependence of Rydberg state excitation (RSE) process of Ar subject to intense laser fields. By simultaneously measuring ionization and RSE yields of Ar atoms subject to strong laser fields at a series of wavelengths, we obtain the wavelength scaling law of the ratio of Ar$^{*}$ over Ar$^{+}$ with respect to the laser intensity, and this result can be well reproduced by a nonadiabatic model, but not by the classical-trajectory Monte Carlo model. Our results indicate that the nonadiabatic corrections of the photoelectron tunneling exit and tunneling probability play a significant role at shorter wavelengths. Analysis shows that the wavelength dependence phenomenon is due to the interplay of the nonadiabatic effect, wave-packet diffusion and Coulomb focusing effect of the liberated electron.
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Received: 17 July 2023
Published: 26 September 2023
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| PACS: |
32.80.Rm
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(Multiphoton ionization and excitation to highly excited states)
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03.65.Sq
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(Semiclassical theories and applications)
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42.50.Hz
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(Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)
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32.80.Wr
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(Other multiphoton processes)
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