中国物理B ›› 2008, Vol. 17 ›› Issue (12): 4523-4528.doi: 10.1088/1674-1056/17/12/032

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

Fine splits of photon emission spectrum of hydrogen atom caused by transitions between different dressed states in intense high frequency laser field

周兆妍, 袁建民   

  1. Department of Physics, National University of Defense Technology, Changsha 410073, China
  • 收稿日期:2008-01-16 修回日期:2008-09-19 出版日期:2008-12-20 发布日期:2008-12-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10734140), the National Basic Research Program of China (Grant No 2007CB815105) and the National High Technology Research and Development Program for Inertial Confinement Fusi

Fine splits of photon emission spectrum of hydrogen atom caused by transitions between different dressed states in intense high frequency laser field

Zhou Zhao-Yan (周兆妍), Yuan Jian-Min (袁建民)   

  1. Department of Physics, National University of Defense Technology, Changsha 410073, China
  • Received:2008-01-16 Revised:2008-09-19 Online:2008-12-20 Published:2008-12-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10734140), the National Basic Research Program of China (Grant No 2007CB815105) and the National High Technology Research and Development Program for Inertial Confinement Fusi

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摘要： The photon emission spectrum of the hydrogen atoms in an intense high-frequency laser pulse is simulated by using one-dimensional soft Coulomb potential. Regular fine structures appear on the two sides of both the odd and even multiples of photon energy of the laser field besides the ordinary odd harmonic peaks. It is proved that the splits of the fine structures are responsible for hyper-Raman lines and the energy spacing between the odd harmonic lines is equal to the difference in energy between the eigenstates with the same parity of the time averaged Krameters-Henneberger (KH) potential. By analysing the features of the fine structures, we also verify that the so-called even order harmonics under the stabilization condition are indeed hyper-Raman lines caused by the transitions between the dressed atomic states with different values of parity.

Abstract: The photon emission spectrum of the hydrogen atoms in an intense high-frequency laser pulse is simulated by using one-dimensional soft Coulomb potential. Regular fine structures appear on the two sides of both the odd and even multiples of photon energy of the laser field besides the ordinary odd harmonic peaks. It is proved that the splits of the fine structures are responsible for hyper-Raman lines and the energy spacing between the odd harmonic lines is equal to the difference in energy between the eigenstates with the same parity of the time averaged Krameters-Henneberger (KH) potential. By analysing the features of the fine structures, we also verify that the so-called even order harmonics under the stabilization condition are indeed hyper-Raman lines caused by the transitions between the dressed atomic states with different values of parity.

Key words: high-order harmonic generation, hyper-Raman line

中图分类号:  (Photoionization of atoms and ions)

  • 32.80.Fb
32.10.Fn (Fine and hyperfine structure) 42.65.Ky (Frequency conversion; harmonic generation, including higher-order harmonic generation)