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    Exploration of strong-field multiphoton double ionization, rescattering, and electron angular distribution of He atoms in intense long-wavelength laser fields: The coupled coherent-state approach

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    Issue Date
    2010-08-03
    Author
    Guo, Jing
    Liu, Xue-Shen
    Chu, Shih-I
    Publisher
    American Physical Society
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
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    Abstract
    We extend the coupled coherent-state (CCS) approach to simulate the strong-field ionization of helium atoms at long wavelengths. This approach uses a basis of trajectories guided by frozen Gaussian coherent states, sampled from a Monte Carlo distribution, as the initial states of the quantum time-dependent Schr¨odinger equations. The CCS trajectories move over averaged potentials, which can remove the Columbic singularities exactly. The low-energy structure is predicted by our CCS calculation and a “rescattering” event is clearly identified in the higher-energy regime. In addition, the nonsequential double ionization is also explored and the rescattering event can be identified as the major mechanism. Finally, we also study the electron angular distribution of helium. It is found that the maximum angle between the electron and electric field directions becomes smaller with increase in the laser intensity and wavelength.
    Description
    This work was partially supported by the Chemical Sciences, Geosciences and Biosciences Division of the Office of Basic Energy Sciences, Office of Sciences, US Department of Energy and by the US National Science Foundation. J.G. would also like to acknowledge the partial support of the Chinese Scholarship Council (CSC). J.G. and X.L. were partially supported by the National Natural Science Foundation of China under Grant No. 10974068.
    URI
    http://hdl.handle.net/1808/16040
    DOI
    https://doi.org/10.1103/PhysRevA.82.023402
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    • Chemistry Scholarly Works [610]
    Citation
    Guo, Jing, Xue-Shen Liu, and Shih-I Chu. "Exploration of strong-field multiphoton double ionization, rescattering, and electron angular distribution of He atoms in intense long-wavelength laser fields: The coupled coherent-state approach." Phys. Rev. A 82, 023402 – Published 3 August 2010 http://dx.doi.org/10.1103/PhysRevA.82.023402

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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