The ab initio investigation of ionization shows the strong regularization of the Coulomb potential by a high-frequency laser field in the stabilization regime, which is characterized with a large energy shift in the first dressed state. The decreasing of the second major ionization burst at the lowering edge of the laser pulse indicates another aspect of three-dimensional effect. Moreover, the modulation in the ionization time profile, previously attributed to the classical drift [Phys. Rev. A83, 063418 (2011)], is illustrated by a superposition of the two free-electron wave-packets, which have arisen via ionization from the two different Kramers–Henneberger states. This finding is in excellent agreement with the time profile of the current density.
© 2012 Optical Society of America
Atomic and Molecular Physics
Original Manuscript: April 19, 2012
Revised Manuscript: June 18, 2012
Manuscript Accepted: July 11, 2012
Published: August 24, 2012
Hossein Ebadi, "Time analysis of above-threshold ionization in extreme-ultraviolet laser pulses: a three-dimensional study," J. Opt. Soc. Am. B 29, 2503-2509 (2012)