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Title: Strongly driven molecules: Traces of soft recollisions for intermediate intensities in the over-the-barrier regime

Abstract

Using a three-dimensional quasiclassical technique, we explore double ionization in N{sub 2} when driven by a linearly polarized, infrared (800 nm) long (27 fs) laser pulse. For intensities ranging from the tunneling to the over-the-barrier regime, we identify the double-ionization pathways in a unified way as a function of total final electron energy. Moreover, for intermediate intensities in the over-the-barrier regime we find that the correlated electron momenta have a prevailing square pattern. This square pattern is mainly due to the delayed (one electron is ejected with a delay after recollision) pathway's contribution to double ionization. For intermediate intensities the delayed pathway is dominated by 'soft' recollisions [identified in Phys. Rev. A 80, 053415 (2009)], with the first electron tunneling at large field phases. We expect this square pattern to be absent for high intensities.

Authors:
 [1];  [2];  [3]
  1. Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT (United Kingdom)
  2. (United States)
  3. Chemistry Department, University of Massachusetts at Amherst, Amherst, Massachusetts, 01003 (United States)
Publication Date:
OSTI Identifier:
22068726
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 84; Journal Issue: 3; Other Information: (c) 2011 American Institute of Physics; Country of input: Syrian Arab Republic; Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ELECTRON CORRELATION; ELECTRONS; IONIZATION; LASERS; MOLECULES; PULSES; THREE-DIMENSIONAL CALCULATIONS; TUNNEL EFFECT

Citation Formats

Emmanouilidou, A., Chemistry Department, University of Massachusetts at Amherst, Amherst, Massachusetts, 01003, and Tchitchekova, D. S. Strongly driven molecules: Traces of soft recollisions for intermediate intensities in the over-the-barrier regime. United States: N. p., 2011. Web. doi:10.1103/PHYSREVA.84.033407.
Emmanouilidou, A., Chemistry Department, University of Massachusetts at Amherst, Amherst, Massachusetts, 01003, & Tchitchekova, D. S. Strongly driven molecules: Traces of soft recollisions for intermediate intensities in the over-the-barrier regime. United States. doi:10.1103/PHYSREVA.84.033407.
Emmanouilidou, A., Chemistry Department, University of Massachusetts at Amherst, Amherst, Massachusetts, 01003, and Tchitchekova, D. S. Thu . "Strongly driven molecules: Traces of soft recollisions for intermediate intensities in the over-the-barrier regime". United States. doi:10.1103/PHYSREVA.84.033407.
@article{osti_22068726,
title = {Strongly driven molecules: Traces of soft recollisions for intermediate intensities in the over-the-barrier regime},
author = {Emmanouilidou, A. and Chemistry Department, University of Massachusetts at Amherst, Amherst, Massachusetts, 01003 and Tchitchekova, D. S.},
abstractNote = {Using a three-dimensional quasiclassical technique, we explore double ionization in N{sub 2} when driven by a linearly polarized, infrared (800 nm) long (27 fs) laser pulse. For intensities ranging from the tunneling to the over-the-barrier regime, we identify the double-ionization pathways in a unified way as a function of total final electron energy. Moreover, for intermediate intensities in the over-the-barrier regime we find that the correlated electron momenta have a prevailing square pattern. This square pattern is mainly due to the delayed (one electron is ejected with a delay after recollision) pathway's contribution to double ionization. For intermediate intensities the delayed pathway is dominated by 'soft' recollisions [identified in Phys. Rev. A 80, 053415 (2009)], with the first electron tunneling at large field phases. We expect this square pattern to be absent for high intensities.},
doi = {10.1103/PHYSREVA.84.033407},
journal = {Physical Review. A},
issn = {1050-2947},
number = 3,
volume = 84,
place = {United States},
year = {2011},
month = {9}
}