We analyze, quantum mechanically, the dynamics of atomic ionization with a strong, circularly polarized, laser field. We show that the main source for non-adiabatic effects, defined as the deviations from the static-field configuration with corresponding instantaneous amplitude, is connected to an effective barrier lowering due to the laser frequency. Such non-adiabatic effects manifest themselves through ionization rates and yields that depart up to more than one order of magnitude from a static-field configuration which we take as a reference for comparison. As a rule of thumb, such non-adiabatic manifestations get stronger with increasing laser frequency. Beyond circular polarization and atomic targets, these results show the limits of standard instantaneous - static-field like - interpretation of laser-matter interaction and the great need for including time-dependent electronic dynamics.
Publication Source (Journal or Book title)
Journal of Physics B: Atomic, Molecular and Optical Physics
Mauger, F., & Bandrauk, A. (2014). Electronic dynamics and frequency effects in circularly polarized strong-field physics. Journal of Physics B: Atomic, Molecular and Optical Physics, 47 (19) https://doi.org/10.1088/0953-4075/47/19/191001