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    High-order perturbation expansion of non-Hermitian Floquet theory for multiphoton and above-threshold ionization processes

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    ChuShih-I_12-14-1999.pdf (118.6Kb)
    Issue Date
    1999-12-14
    Author
    Telnov, Dmitry A.
    Chu, Shih-I
    Publisher
    American Physical Society
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Metadata
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    Abstract
    A high-order perturbation theory is presented for efficient and accurate computation of multiphoton and above-threshold ionization cross sections of atoms and molecules in weak to medium strength laser fields. The procedure is based on a Raleigh-Schrödinger perturbative expansion of the time-independent non-Hermitian Floquet Hamiltonian. The reduced Green function and generalized pseudospectral discretization techniques are extended to facilitate the calculation of complex quasienergy resonance states without the need of diagonalizing the full Floquet Hamiltonian. Explicit expressions are presented for the determination of intensity-dependent total and partial rates and electron angular distributions. The theory is applied to a case study of multiphoton detachment of H- for a range of laser frequencies (corresponding to the absorption of a minimum of two photons) and laser intensities from 107 to 10(12)W/cm(2). It is found that a 16th-order perturbative Floquet procedure provides an excellent description of the two-photon-dominant detachment processes for laser intensity up to 2×10(11)W/cm(2). The predicted electron angular distributions are in good agreement with recent experimental data.
    Description
    This is the publisher's version, also available electronically from http://journals.aps.org/pra/abstract/10.1103/PhysRevA.61.013408
    URI
    http://hdl.handle.net/1808/16065
    DOI
    https://doi.org/10.1103/PhysRevA.61.013408
    ISSN
    1050-2947
    Collections
    • Chemistry Scholarly Works [610]
    Citation
    Telnov, Dmitry A.; Chu, Shih-I. (1999). "High-order perturbation expansion of non-Hermitian Floquet theory for multiphoton and above-threshold ionization processes." Physical Review A, 61(01):013408. http://dx.doi.org/10.1103/PhysRevA.61.013408.

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    KU Libraries
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    Lawrence, KS 66045
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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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