中国物理B ›› 2018, Vol. 27 ›› Issue (9): 93202-093202.doi: 10.1088/1674-1056/27/9/093202

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇    下一篇

Numerical tests of theoretical models describing ionization of H(1s) atom by linearly polarized flat pulse of laser radiation

Jarosław H Bauer, Min Deng(邓敏)   

  1. 1 Katedra Fizyki Teoretycznej, Wydział Fizyki i Informatyki Stosowanej Uniwersytetu Łódzkiego, Ul. Pomorska 149/153, PL-90-236 Łódź, Poland;
    2 State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China
  • 收稿日期:2018-04-27 修回日期:2018-07-02 出版日期:2018-09-05 发布日期:2018-09-05
  • 通讯作者: Jarosław H Bauer, Min Deng E-mail:bauer@uni.lodz.pl;dengm13@mails.tsinghua.edu.cn
  • 基金资助:

    Project supported by the University of ?ód?.

Numerical tests of theoretical models describing ionization of H(1s) atom by linearly polarized flat pulse of laser radiation

Jarosław H Bauer1, Min Deng(邓敏)2   

  1. 1 Katedra Fizyki Teoretycznej, Wydzia? Fizyki i Informatyki Stosowanej Uniwersytetu ?ódzkiego, Ul. Pomorska 149/153, PL-90-236 ?ód?, Poland;
    2 State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China
  • Received:2018-04-27 Revised:2018-07-02 Online:2018-09-05 Published:2018-09-05
  • Contact: Jarosław H Bauer, Min Deng E-mail:bauer@uni.lodz.pl;dengm13@mails.tsinghua.edu.cn
  • Supported by:

    Project supported by the University of ?ód?.

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摘要：

We derive the well-known Coulomb correction factor for the Gordon-Volkov wave function describing an outgoing electron in the process of ionization in an intense laser field. Although rigorous treatment would limit its use only to laser fields much lower than the so-called barrier-suppression field, it appears that in practice the correction factor may be used also close to and even above this critical value of the laser field. We compare predictions of several analytical expressions describing ionization rate of the hydrogen atom in its ground state in the strong linearly polarized laser field. We also compare ionization probabilities obtained by integrating these ionization rates over a temporal envelope of the laser pulse with predictions based on the exact numerical solution to the time-dependent Schrödinger equation.

关键词: laser fields, ionization, S-matrix, Coulomb-Volkov wave function

Abstract:

We derive the well-known Coulomb correction factor for the Gordon-Volkov wave function describing an outgoing electron in the process of ionization in an intense laser field. Although rigorous treatment would limit its use only to laser fields much lower than the so-called barrier-suppression field, it appears that in practice the correction factor may be used also close to and even above this critical value of the laser field. We compare predictions of several analytical expressions describing ionization rate of the hydrogen atom in its ground state in the strong linearly polarized laser field. We also compare ionization probabilities obtained by integrating these ionization rates over a temporal envelope of the laser pulse with predictions based on the exact numerical solution to the time-dependent Schrödinger equation.

Key words: laser fields, ionization, S-matrix, Coulomb-Volkov wave function

中图分类号:  (Multiphoton ionization and excitation to highly excited states)

  • 32.80.Rm
33.80.Rv (Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states))