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.
Stavros, V. G., & Leone, S. R. (2008). The influence of ion gratings on rotational wavepacket dynamics in H2. Chemical Physics Letters, 452(1–3), 33–37. https://doi.org/10.1016/j.cplett.2007.12.034