High-order harmonic generation and multi-photon ionization of ethylene in laser fields

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Applying time-dependent local density approximation (TDLDA), we study the high-order harmonic generation (HHG) of ethylene subjected to the one-color ($ω=2.72$ eV) and the two-color ($ω_1=2.72$ eV and $ω_2=5.44$ eV) ultrashort intense laser pulses. The HHG spectrum of ethylene in the one-color laser field shows the obvious plateaus and odd order harmonics are produced while the two-color laser field can result in the breaking of the symmetry and generation of the even order harmonic. The ionization probabilities are obtained showing the increase of the ionization probability of higher charge state by the two-color laser field. The temporal structures of HHG spectrum of ethylene is explored by means of the time-frequency analysis showing new insights of the HHG mechanisms in the one-color and the two-color laser fields.
5 pages, 4 figures

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Atomic and Molecular Clusters, Computational Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/225164

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0903.5253
 http://arxiv.org/abs/0903.5253

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arXiv