Enhancement of Bichromatic High-Order Harmonic Generation by a Strong Laser Field and Its Third Harmonic
PI Liang-Wen1 , SHI Ting-Yun2 , QIAO Hao-Xue1
1 Department of Physics, Wuhan University, Wuhan 430072
2 Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071
Enhancement of Bichromatic High-Order Harmonic Generation by a Strong Laser Field and Its Third Harmonic
PI Liang-Wen1 ;SHI Ting-Yun2 ;QIAO Hao-Xue1
1 Department of Physics, Wuhan University, Wuhan 430072
2 Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071
关键词 ：
42.65.Ky ,
32.80.Rm
Abstract ： We investigate high-order harmonic generation (HHG) in a linearly polarized bichromatic field composed of a fundamental laser field with frequency ω and an additional laser field with frequency 3ω. The numerical results show that it is possible to enhance the intensity of most high harmonics in orders of magnitude. A most striking feature in the enhancement is that the intensity of several special high harmonics is practically impaired as compared with that in the monochromatic case. The qualitative explanation to the great enhancement is that the additional high-frequency field can provide new transition paths for electrons to reach the continuum. The relative phase between the fundamental field and its third harmonic field also affects the intensity of high-order harmonics near the cutoff efficiently.
Key words ：
42.65.Ky
32.80.Rm
出版日期: 2006-06-01
:
42.65.Ky
(Frequency conversion; harmonic generation, including higher-order harmonic generation)
32.80.Rm
(Multiphoton ionization and excitation to highly excited states)
引用本文:
PI Liang-Wen;SHI Ting-Yun;QIAO Hao-Xue. Enhancement of Bichromatic High-Order Harmonic Generation by a Strong Laser Field and Its Third Harmonic[J]. 中国物理快报, 2006, 23(6): 1490-1493.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y2006/V23/I6/1490
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2006, Vol. 23 
