中国物理B ›› 2008, Vol. 17 ›› Issue (10): 3668-3671.doi: 10.1088/1674-1056/17/10/023

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Multiphoton resonant ionization of hydrogen atom exposed to two-colour laser pulses

王培杰, 方 炎   

  1. The Beijing Key Laboratory for Nano-Photonics and Nano-Structure, Capital Normal University, Beijing 100037, China
  • 收稿日期:2008-01-28 修回日期:2008-05-04 出版日期:2008-10-20 发布日期:2008-10-20

Multiphoton resonant ionization of hydrogen atom exposed to two-colour laser pulses

Wang Pei-Jie(王培杰)† and Fang Yan(方炎)   

  1. The Beijing Key Laboratory for Nano-Photonics and Nano-Structure, Capital Normal University, Beijing 100037, China
  • Received:2008-01-28 Revised:2008-05-04 Online:2008-10-20 Published:2008-10-20
  • Supported by:
    time-dependent Schr\"odinger equation, multiphoton ionization, ionization probability

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摘要： This paper studies the multiphoton resonant ionization by two-colour laser pulses in the hydrogen atom by solving the time-dependent Schr\"odinger equation. By fixing the parameters of fundamental laser field and scanning the frequency of second laser field, it finds that the ionization probability shows several resonance peaks and is also much larger than the linear superposition of probabilities by applying two lasers separately. The enhancement of the ionization happens when the system is resonantly pumped to the excited states by absorbing two or more colour photons non-sequentially.

Abstract: This paper studies the multiphoton resonant ionization by two-colour laser pulses in the hydrogen atom by solving the time-dependent Schr?dinger equation. By fixing the parameters of fundamental laser field and scanning the frequency of second laser field, it finds that the ionization probability shows several resonance peaks and is also much larger than the linear superposition of probabilities by applying two lasers separately. The enhancement of the ionization happens when the system is resonantly pumped to the excited states by absorbing two or more colour photons non-sequentially.

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)