中国物理B ›› 2009, Vol. 18 ›› Issue (12): 5291-5295.doi: 10.1088/1674-1056/18/12/029

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Multiphoton ionization of the hydrogen atom exposed to circularly or linearly polarized laser pulses

何峰1, 王培杰2   

  1. (1)James R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506-2604, USA; (2)The Beijing Key Laboratory for Nano-Photonics and Nano-Structure, Capital Normal University, Beijing 100048, China
  • 收稿日期:2009-03-18 修回日期:2009-05-13 出版日期:2009-12-20 发布日期:2009-12-20

Multiphoton ionization of the hydrogen atom exposed to circularly or linearly polarized laser pulses

Wang Pei-Jie(王培杰)a)† and He Feng(何峰)b)   

  1. a The Beijing Key Laboratory for Nano-Photonics and Nano-Structure, Capital Normal University, Beijing 100048, China; b James R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506-2604, USA
  • Received:2009-03-18 Revised:2009-05-13 Online:2009-12-20 Published:2009-12-20

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摘要： This paper studies the multiphoton ionization of the hydrogen atom exposed to the linearly or circularly polarized laser pulses by solving the time-dependent Schr?dinger equation. It finds that the ratio of the ionization probabilities by linearly and circularly polarized laser pulses varies with the numbers of absorbing photons. With the same laser intensity, the circularly polarized laser pulse favors to ionize the atom with more ease than the linearly polarized laser pulse if only two or three photons are necessary to be absorbed. For the higher order multiphoton ionization, the linearly polarized laser pulse has the advantage over circularly polarized laser pulse to ionize the atom.

Abstract: This paper studies the multiphoton ionization of the hydrogen atom exposed to the linearly or circularly polarized laser pulses by solving the time-dependent Schr?dinger equation. It finds that the ratio of the ionization probabilities by linearly and circularly polarized laser pulses varies with the numbers of absorbing photons. With the same laser intensity, the circularly polarized laser pulse favors to ionize the atom with more ease than the linearly polarized laser pulse if only two or three photons are necessary to be absorbed. For the higher order multiphoton ionization, the linearly polarized laser pulse has the advantage over circularly polarized laser pulse to ionize the atom.

Key words: time-dependent Schr?dinger equation, multiphoton ionization, ionization probability

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

  • 32.80.Rm
31.15.-p (Calculations and mathematical techniques in atomic and molecular physics) 42.60.Jf (Beam characteristics: profile, intensity, and power; spatial pattern formation)