中国物理B ›› 2009, Vol. 18 ›› Issue (4): 1458-1462.doi: 10.1088/1674-1056/18/4/028

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Phase-dependent quantum interference between different pathways in bichromatic harmonic generation

蔡俊, 王黎明, 乔豪学   

  1. Department of Physics, Wuhan University, Wuhan 430072, China
  • 收稿日期:2008-06-25 修回日期:2008-07-09 出版日期:2009-04-20 发布日期:2009-04-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10374074).

Phase-dependent quantum interference between different pathways in bichromatic harmonic generation

Cai Jun(蔡俊), Wang Li-Ming(王黎明), and Qiao Hao-Xue(乔豪学)†   

  1. Department of Physics, Wuhan University, Wuhan 430072, China
  • Received:2008-06-25 Revised:2008-07-09 Online:2009-04-20 Published:2009-04-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10374074).

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摘要： This paper studies the harmonic generation of the hydrogen atom subjected to a collinear bichromatic laser field by numerically solving the time-dependent Schr?dinger equation using the split-operator pseudo-spectral method. By adding a frequency variation to the additional field, the contributions of different pathways to particular order harmonic generation can be isolated. The quantum interference pattern between harmonic pathways, which influences the harmonic intensity, is found to be either constructive or destructive with respect to different relative phase of the two field components. Detailed description of up to the 35th-order harmonics and the harmonic pathways for a wide range of field parameters is presented.

关键词: harmonic pathway, quantum interference, split-operator pseudo-spectral method

Abstract: This paper studies the harmonic generation of the hydrogen atom subjected to a collinear bichromatic laser field by numerically solving the time-dependent Schrödinger equation using the split-operator pseudo-spectral method. By adding a frequency variation to the additional field, the contributions of different pathways to particular order harmonic generation can be isolated. The quantum interference pattern between harmonic pathways, which influences the harmonic intensity, is found to be either constructive or destructive with respect to different relative phase of the two field components. Detailed description of up to the 35th-order harmonics and the harmonic pathways for a wide range of field parameters is presented.

Key words: harmonic pathway, quantum interference, split-operator pseudo-spectral method

中图分类号:  (Frequency conversion; harmonic generation, including higher-order harmonic generation)

  • 42.65.Ky
32.80.-t (Photoionization and excitation) 42.50.-p (Quantum optics)