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    Effect of electron correlation on high-order-harmonic generation of helium atoms in intense laser fields: Time-dependent generalized pseudospectral approach in hyperspherical coordinates

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    ChuShih-I_2-2-2006.pdf (656.2Kb)
    Issue Date
    2006-02-02
    Author
    Chu, Shih-I
    Tong, Xiao-Min
    Guan, Xiaoxu
    Publisher
    American Physical Society
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
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    Abstract
    We present a time-dependent generalized pseudospectral (TDGPS) approach in hyperspherical coordinates for fully ab initio nonperturbative treatment of multiphoton dynamics of atomic systems in intense laser fields. The procedure is applied to the investigation of high-order-harmonic generation (HHG) of helium atoms in ultrashort laser pulses at a KrF wavelength of 248.6nm. The six-dimensional coupled hyperspherical-adiabatic-channel equations are discretized and solved efficiently and accurately by means of the TDGPS method. The effects of electron correlation and doubly excited states on HHG are explored in detail. A HHG peak with Fano line profile is identified which can be attributed to a broad resonance of doubly excited states. Comparison of the HHG spectra of the ab initio two-electron and the single-active-electron model calculations is also presented.
    Description
    This is the published version, also available here: http://dx.doi.org/10.1103/PhysRevA.73.023403.
    URI
    http://hdl.handle.net/1808/15977
    DOI
    https://doi.org/10.1103/PhysRevA.73.023403
    Collections
    • Chemistry Scholarly Works [610]
    Citation
    Chu, Shih-I., Tong, Xiao-Min., Guan, Xiaoxu. "Effect of electron correlation on high-order-harmonic generation of helium atoms in intense laser fields: Time-dependent generalized pseudospectral approach in hyperspherical coordinates." Phys. Rev. A 73, 023403 – Published 2 February 2006. http://dx.doi.org/10.1103/PhysRevA.73.023403.

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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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