Intensity-dependent asymmetric photoionization in few-cycle laser pulses
Zhang Xiao-Ming(张晓明)a)b), Zhang Jing-Tao(张敬涛)a)†, Gong Qi-Huang(龚旗煌)b), and Xu Zhi-Zhan(徐至展)a)b)
a State Key Laboratory for High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China; b State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871, China
Abstract The asymmetric photoionization of atoms irradiated by intense, few-cycle laser pulses is studied numerically. The results show that the pulse intensity affects the asymmetric photoionization in three aspects. First, at higher intensities, the asymmetry becomes distinctive for few-cycle pulses of longer durations. Second, as the laser intensity increases, the maximal asymmetry first decreases then increases after it has reached a minimal value. Last, the value of the carrier-envelope phase corresponding to the maximal asymmetry varies with the pulse intensity. This study reveals that the increasing of pulse intensity is helpful for observing the asymmetric photoionization.
Received: 15 April 2008
Revised: 26 June 2008
Accepted manuscript online:
(Calculations and mathematical techniques in atomic and molecular physics)
Fund: Project supported by the National
Natural Science Foundation of China (Grant Nos 60408008 and
10774153), the Natural Science Key Foundation of Shanghai (Grant No
04JC14036), the National Basic Research Program of China (Grant No
2006CD806000), and the Ris
Cite this article:
Zhang Xiao-Ming(张晓明), Zhang Jing-Tao(张敬涛), Gong Qi-Huang(龚旗煌), and Xu Zhi-Zhan(徐至展) Intensity-dependent asymmetric photoionization in few-cycle laser pulses 2009 Chin. Phys. B 18 1014
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