Effect of electron correlation on high-order harmonic generation in helium model atom

doi:10.1088/1674-1056/22/1/013101

Abstract High-order harmonic generation (HHG) of a helium model atom in an intense laser field has been numerically investigated. The influence of electron correlation on HHG is analysed by changing the strength between the electrons. The numerical results show that as the electron interaction strength becomes small, the first ionization energy increases rapidly, which results in the decrease in ionization. So the conversion efficiency of high harmonic lying in the plateau decreases greatly, while the cutoff harmonic order in harmonic spectrum increases.

Keywords: electron correlation high-order harmonic generation B-spline

Received: 06 April 2012
Revised: 23 May 2012
Accepted manuscript online:

PACS:	31.70.Hq	(Time-dependent phenomena: excitation and relaxation processes, and reaction rates)
	32.80.Rm	(Multiphoton ionization and excitation to highly excited states)
	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. 10974224) and the National Basic Research Program of China (Grant No. 2010CB832803).

Corresponding Authors: Shi Ting-Yun
E-mail: tyshi@wipm.ac.cn

Cite this article:

Hu Shi-Lin (胡师林), Shi Ting-Yun (史庭云) Effect of electron correlation on high-order harmonic generation in helium model atom 2013 Chin. Phys. B 22 013101

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