The influence of ion gratings on rotational wavepacket dynamics in H2

  • Stavros V
  • Leone S
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Abstract

We generalize earlier work [V.G. Stavros, E. Harel, S.R. Leone, J. Chem. Phys. 122 (2005) 064301] by illustrating the plausible role of ion gratings in time-dependent degenerate four-wave mixing (TD-DFWM) experiments in H2. We postulate that at high laser intensities (1014-1015W/cm2), H2+/H+ions generate a static ion grating, it's signature manifested in the transformation from homodyne- to heterodyne-detection of the TD-DFWM signal, depending on laser intensity. The change in signal detection agrees with the calculated intensity for barrier suppression ionization (BSI) in H2and the reported onset of saturation for H2+and H+, pointing towards the likely role of ion gratings in intense laser field, FWM experiments. © 2007 Elsevier B.V. All rights reserved.

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Authors

  • Vasilios G. Stavros

  • Stephen R. Leone

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