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

doi:10.1088/1674-1056/22/2/023204

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 I_p+2U_p. 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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