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Title: Photoelectron spectra in circularly and elliptically polarized laser pulses

Journal Article · · Physical Review A
 [1]; ORCiD logo [2]; ORCiD logo [2]
  1. University of Colorado, Boulder, CO (United States); JILA and Department of Physics (University of Colorado Boulder)
  2. University of Colorado, Boulder, CO (United States)

We present results of numerical simulations of the time-dependent Schrödinger equation and theoretical analysis concerning the interaction of a rare gas atom with circularly and elliptically polarized laser pulses. In agreement with recent observation in circularly polarized fields, the photoelectron energy spectra for counterrotating electrons are peaked at lower kinetic energy than those for corotating electrons. We show that this difference can be interpreted as being due to the additional pathways to ionization that are available for the counterrotating electrons only. Furthermore, our results show, in agreement with earlier work, that the offset angle by which the emission of electrons is rotated in an elliptically polarized field increases with each successive above-threshold ionization (ATI) order and is larger for the emission from counterrotating states as compared to that from corotating states. As a result, a simple model based on the interference and relative phase difference between just three continuum states provides remarkable agreement and once again emphasizes the importance of the additional ionization pathways available for the counterrotating electrons.

Research Organization:
University of Colorado, Boulder, CO (United States)
Sponsoring Organization:
U.S. National Science Foundation (NSF); USDOE
Grant/Contract Number:
SC0001771
OSTI ID:
2438483
Journal Information:
Physical Review A, Journal Name: Physical Review A Journal Issue: 2 Vol. 109; ISSN 2469-9926
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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