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    Nonperturbative treatments of level shifts of excited states and high-order harmonic generation in strong fields

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    Chu_Nonperturbative_Treatments.pdf (852.5Kb)
    Issue Date
    1990-01-01
    Author
    Chu, Shih-I
    Wang, Kwanghsi
    Layton, Eric
    Publisher
    Optical Society of America
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
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    Abstract
    In this paper we accomplish three goals. First, we present new nonperturbative results of complex quasi-energies (shifts and widths) for several low-lying excited states of atomic H in strong fields, using the L2 non-Hermitian Floquet matrix technique. Second, we present a new nonperturbative L2 technique for the treatment of ac Stark shifts of arbitrary excited states. We found that all the Rydberg states in weak fields are upshifted and closely follow the quadratic field dependence described by the ponderomotive potential e2F2/4mω2. Large deviation from the ponderomotive shift and intricate level-shift behaviors, however, occur in strong fields. Finally, we present a classical nonperturbative treatment of the electronic motion in intense laser fields. We show that the spectral analysis of classical trajectories can provide detailed insights regarding the mechanisms responsible for the multiple-harmonic generation recently observed in high-intensity experiments.
    Description
    This is the published version, also available here: http://dx.doi.org/10.1364/JOSAB.7.000425.
    URI
    http://hdl.handle.net/1808/15873
    DOI
    https://doi.org/10.1364/JOSAB.7.000425
    Collections
    • Chemistry Scholarly Works [610]
    Citation
    Shih-I Chu, Kwanghsi Wang, and Eric Layton, "Nonperturbative treatments of level shifts of excited states and high-order harmonic generation in strong fields," J. Opt. Soc. Am. B 7, 425-432 (1990) http://dx.doi.org/10.1364/JOSAB.7.000425.

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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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