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    Complex-scaling generalized pseudospectral method for quasienergy resonance states in two-center systems: Application to the Floquet study of charge resonance enhanced multiphoton ionization of molecular ions in intense low-frequency laser fields

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    ChuShih-I_12-13-2000.pdf (185.7Kb)
    Issue Date
    2000-12-13
    Author
    Chu, Shih-I
    Chu, Xi
    Publisher
    American Physical Society
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
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    Abstract
    We present a complex-scaling generalized pseudospectral method for accurate and efficient treatment of resonance states in two-center molecular systems, involving optimal nonuniform grid discretization of the Hamiltonian in prolate spheroidal coordinates. The procedure is applied to the first converged non-Hermitian Floquet study of multiphoton ionization of molecular ions in intense low-frequency (1064 nm) laser fields. We explore the underlying mechanism responsible for the ionization enhancement of H+2 at some critical internuclear distances. Several features of the complex quasienergy states are observed. A detailed analysis of the nature and dynamical behavior of these quasienergy states reveals that the ionization enhancement is mainly due to the effect of charge-resonance-enhanced multiphoton resonances of the 1σg and 1σu states with excited electronic states at some particular internuclear distances. These “critical” distances depend on the details of molecular electronic structure and the laser frequency and intensity used in the study.
    Description
    This is the published version, also available here: http://dx.doi.org/10.1103/PhysRevA.63.013414.
    URI
    http://hdl.handle.net/1808/15970
    DOI
    https://doi.org/10.1103/PhysRevA.63.013414
    Collections
    • Chemistry Scholarly Works [610]
    Citation
    Chu, Shih-I. & Chu, Xu. "Complex-scaling generalized pseudospectral method for quasienergy resonance states in two-center systems: Application to the Floquet study of charge resonance enhanced multiphoton ionization of molecular ions in intense low-frequency laser fields." Phys. Rev. A 63, 013414 – Published 13 December 2000. http://dx.doi.org/10.1103/PhysRevA.63.013414.

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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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