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Special Issue:
SPECIAL TOPIC — Ultrafast physics in atomic, molecular and optical systems
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| SPECIAL TOPIC — Ultrafast physics in atomic, molecular and optical systems |
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Semiclassical Coulomb-scattering model for strong-field tunneling ionization |
| Qing Zhao(赵晴)1,2,†, Yigen Peng(彭易根)2,†, Jiayin Che(车佳殷)2,3, Chao Chen(陈超)2,4, Shang Wang(王赏)1,‡, Guoguo Xin(辛国国)5,§, and Yanjun Chen(陈彦军)2,¶ |
1 College of Physics and Hebei Key Laboratory of Photophysics Research and Application, Hebei Normal University, Shijiazhuang 050010, China;
2 College of Physics and Information Technology and Quantum Materials and Devices Key Laboratory of Shaanxi Province's High Education Institution, Shaan'xi Normal University, Xi'an 710119, China;
3 School of Physics, Henan Normal University, Xinxiang 453007, China;
4 College of Physics and Electronic Engineering, Xingtai University, Xingtai 054001, China;
5 School of Physics, Northwest University, Xi'an 710127, China |
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Abstract This study analytically examines the ionization of atoms in strong near-circular laser fields. The classic Keldysh-Rutherford (KR) Coulomb-scattering (CS) model [Phys. Rev. Lett. 121 123201 (2018)] successfully explained the attoclock experimental curve for the H atom at lower laser intensities. Here, we develop a semiclassical model that includes the initial conditions related to the quantum properties of tunneling in the KR model at the beginning of the scattering process. This model is able to explain recent attoclock experimental curves over a wider range of laser and atomic parameters. Our results show the importance of system symmetry and quantum effects in attoclock measurements, suggesting the complex role of the Coulomb potential in strong-field ionization.
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Received: 02 April 2025
Revised: 20 May 2025
Accepted manuscript online: 04 June 2025
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PACS:
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32.80.-t
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(Photoionization and excitation)
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42.65.Re
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(Ultrafast processes; optical pulse generation and pulse compression)
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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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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 12174239, 12347165, and 12404330), Shaanxi Fundamental Science Research Project for Mathematics and Physics (Grant No. 23JSY022), Natural Science Basic Research Program of Shaanxi (Grant No. 2022JM-015), Hebei Natural Science Foundation (Grant No. A2022205002), and Science and Technology Project of Hebei Education Department (Grant No. QN2022143). |
Corresponding Authors:
Shang Wang, Guoguo Xin, Yanjun Chen
E-mail: phywangshang@163.com;xinguo@nwu.edu.cn;chenyjhb@gmail.com
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Cite this article:
Qing Zhao(赵晴), Yigen Peng(彭易根), Jiayin Che(车佳殷), Chao Chen(陈超), Shang Wang(王赏), Guoguo Xin(辛国国), and Yanjun Chen(陈彦军) Semiclassical Coulomb-scattering model for strong-field tunneling ionization 2025 Chin. Phys. B 34 093201
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