期刊
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
卷 33, 期 13, 页码 2479-2488出版社
IOP PUBLISHING LTD
DOI: 10.1088/0953-4075/33/13/308
关键词
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A quasi-classical three-step model for high-harmonic generation is presented. The results for the harmonic emission rate obtained using this model agree very well with the exact results. For an elliptically polarized laser field a staircase of plateaux is observed. Both the heights and the cut-off positions of these plateaux are explained. An analytical formula for the cut-off law is derived and applied to determine the cut-off of the harmonic spectrum for each of the observed plateaux. We also present the electron orbits, obtained as solutions of the classical equation of motion with the complex time.
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