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Chin. Phys. B, 2012, Vol. 21(8): 080202    DOI: 10.1088/1674-1056/21/8/080202
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Controls for the generations of high-order harmonics and attosecond pulses by infrared laser field combined with a low-frequency pulse

He Hai-Xiang (贺海翔), Guo Ya-Hui (郭雅慧), He Guo-Zhong (何国钟 )
State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
Abstract  We investigate high-order harmonic generations by controlling various quantum paths of harmonics in an infrared laser field which combines a low-frequency pulse. Both classical theory and quantum wavelet transform method are used to understand the physics of harmonics. By adjusting the carrier envelope phase of the fundamental field, the intensities of harmonic spectra increase and the harmonics in the plateau become regular. Attosecond pulses each with a duration of 58 as are obtained directly by compressing the harmonics, and with phase compensation an isolated attosecond pulse less than 30 as can be generated.
Keywords:  high-order harmonics      isolated attosecond pulse      LZH-DICP code  
Received:  07 December 2011      Revised:  20 January 2012      Accepted manuscript online: 
PACS:  02.60.Cb (Numerical simulation; solution of equations)  
  32.80.Rj  
  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. 10974198).
Corresponding Authors:  He Hai-Xiang     E-mail:  haixianghe@dicp.ac.cn

Cite this article: 

He Hai-Xiang (贺海翔), Guo Ya-Hui (郭雅慧), He Guo-Zhong (何国钟 ) Controls for the generations of high-order harmonics and attosecond pulses by infrared laser field combined with a low-frequency pulse 2012 Chin. Phys. B 21 080202

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