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    Femtosecond-scale response of GaAs to ultrafast laser pulses RID A-7793-2008

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    PhysRevB.66.081202.pdf (90.46Kb)
    Date
    2002
    Author
    Dumitrica, T.
    Allen, Roland E.
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    Abstract
    We present nonadiabatic simulations of the coherent response of crystalline GaAs irradiated by intense femtosecond-scale laser pulses. Above a threshold fluence, which corresponds to promotion of about 12% of the valence electrons into the conduction band, the lattice is destabilized and the electronic band gap collapses to zero. This confirms the nonthermal nature of recently observed structural changes driven by electronic excitations and occurring during the first few hundred femtoseconds.
    URI
    http://dx.doi.org/10.1103/PhysRevB.66.081202
    https://hdl.handle.net/1969.1/127314
    Description
    Journals published by the American Physical Society can be found at http://journals.aps.org/
    Subject
    TIGHT-BINDING THEORY
    TRANSITIONS
    SEMICONDUCTORS
    ELECTRON
    DYNAMICS
    Physics
    Department
    Physics and Astronomy
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    Citation
    T. Dumitrica and Roland E. Allen. Phys.Rev.B 66 081202 2002."Copyright (2002) by the American Physical Society."

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