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Chin. Phys. B, 2013, Vol. 22(2): 023204    DOI: 10.1088/1674-1056/22/2/023204
ATOMIC AND MOLECULAR PHYSICS Prev   Next  

Atomic high-order harmonic generation from a circularly polarized laser pulse

Guo Fu-Ming (郭福明)a, Chen Gao (陈高)b, Chen Ji-Gen (陈基根)c, Li Su-Yu (李苏宇)a, Yang Yu-Jun (杨玉军)a
a Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China;
b School of Science, Changchun University of Science and Technology, Changchun 130022, China;
c Department of Physics and Materials Engineering, Taizhou University, Taizhou 318000, China
Abstract  We demonstrate theoretically that the high-order harmonic of atom can be generated by a circularly polarized laser pulse. The harmonic spectrum shows a clear cutoff with an energy Ip+2Up. Especially, the high-order harmonic generation comes from the multiple recombination of the ionized electron with non-zero initial velocity. These results are verified by the classical model theory and the time-frequency analysis of harmonic spectrum.
Keywords:  high-order harmonic generation      circularly polarized intense laser  
Received:  14 September 2012      Revised:  17 November 2012      Accepted manuscript online: 
PACS:  32.80.Rm (Multiphoton ionization and excitation to highly excited states)  
  42.50.Hz (Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)  
  42.65.Ky (Frequency conversion; harmonic generation, including higher-order harmonic generation)  
Fund: Project supported by the National Basic Research Program of China (Grant No. 2013CB922200); the National Natural Science Foundation of China (Grant Nos. 11274141 and 11034003); and the Natural Science Foundation of Zhejiang Province of China (Grant No. Y6110578).
Corresponding Authors:  Yang Yu-Jun     E-mail:  yangyj@jlu.edu.cn

Cite this article: 

Guo Fu-Ming (郭福明), Chen Gao (陈高), Chen Ji-Gen (陈基根), Li Su-Yu (李苏宇), Yang Yu-Jun (杨玉军) Atomic high-order harmonic generation from a circularly polarized laser pulse 2013 Chin. Phys. B 22 023204

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