Nonadiabatic strong field ionization of noble gas atoms in elliptically polarized laser pulses
Abstract
We present theoretically obtained photoelectron momentum distributions (PMDs) for the strong field ionization of argon in an elliptically polarized laser field at a central wavelength of 400 nm. Three different theoretical approaches, namely, a numerical solution of the timedependent Schrödinger equation (TDSE), a nonadiabatic model, and a classicaltrajectory Monte Carlo (CTMC) model are adopted in our calculations. From the TDSE calculations, it is found that the attoclock offset angle (most probable electron emission angles with respect to the minor axis of the laser's polarization ellipse) in the PMD increases with rising ATI order. While this result cannot be reproduced by the CTMC model, the nonadiabatic model achieves good agreement with the TDSE result. Analysis shows that the nonadiabatic corrections of the photoelectron initial momentum distribution (in both longitudinal and transverse directions with respect to the tunneling direction) and nonadiabatic correction of the tunneling exit are responsible for the ATI orderdependent angular shift.
 Publication:

Optics Express
 Pub Date:
 April 2022
 DOI:
 10.1364/OE.454846
 Bibcode:
 2022OExpr..3014873X