Controlling electron collision by counterrotating circular two-color laser fields |
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| Authors: | Baoqin Li Xianghe Ren Jingtao Zhang |
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| Affiliation: | (Department of Physics,Shanghai Normal University,Shanghai 200234,China;International School for Optoelectronic Engineering,QiLu University of Technology(Shandong Academy of Sciences),Jinan 250353,China) |
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| Abstract: | Electron collision as well as its controlling lies in the core of study on nonsequential double ionization (NSDI). A single collision occurred in a convergent time is important to disclose the essential features of the electron correlation.However, it is difficult to form such a collision. By using counterrotating circular two-color (CRTC) laser fields, we show that a single electron collision can be achieved in a convergent time and a net electron correlation is set up within the sub-femtosecond time scale in the NSDI process of Ar atoms. The proposed method is also valid for other atoms, provided that one chooses the frequency and intensity of the CRTC field according to a scaling law. |
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