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.
Received: 25 June 2008
Revised: 09 July 2008
Accepted manuscript online:
PACS:
42.65.Ky
(Frequency conversion; harmonic generation, including higher-order harmonic generation)
Fund: Project supported
by the National Natural Science Foundation of China (Grant No
10374074).
Cite this article:
Cai Jun(蔡俊), Wang Li-Ming(王黎明), and Qiao Hao-Xue(乔豪学) Phase-dependent quantum interference between different pathways in bichromatic harmonic generation 2009 Chin. Phys. B 18 1458
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