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The single attosecond pulse generated by atom exposed to two-color combined laser field

Ye Xiao-Liang Zhao Song-Feng Li Peng-Cheng Zhou Xiao-Xin

The single attosecond pulse generated by atom exposed to two-color combined laser field

Ye Xiao-Liang, Zhao Song-Feng, Li Peng-Cheng, Zhou Xiao-Xin
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  • Abstract views:  3785
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  • Received Date:  19 June 2008
  • Accepted Date:  07 July 2008
  • Published Online:  20 March 2009

The single attosecond pulse generated by atom exposed to two-color combined laser field

  • 1. (1)西北师范大学物理与电子工程学院,兰州 730070; (2)西北师范大学物理与电子工程学院,兰州 730070;兰州重离子加速器国家重点实验室原子核理论研究中心,兰州 730000

Abstract: By solving the time-dependent Schrdinger equation with split-operator method, we study the high harmonics of one-dimensional helium atom exposed to the two-color laser field composed of IR field and UV field, and analyze the characteristics of the attosecond pulse produced by the high-order harmonics. It is found that the width of the attosencond pulse is shortened by the increasing intensity of IR field in the combined laser field. By adjusting the time delay between two lasers, we can enhance the contribution of one of the electron trajectories and suppress that of the other. Thus we can obtain an isolated sub-100 as pulse.

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