Intensity dependence of strong-field double-ionization mechanisms: From field-assisted recollision ionization to recollision-assisted field ionization

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DOIResolve DOI: http://doi.org/10.1103/PhysRevA.80.053415
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TypeArticle
Journal titlePhysical Review A
Volume80
Issue5
Pages053415-1053415-7; # of pages: 7
Subjectmolecular; ionization; laser; field; electron; anticorrelation
AbstractUsing a three-dimensional quasiclassical technique we explore molecular double ionization by a linearly polarized, infrared (800 nm), and ultrashort (6 fs) laser pulse. We first focus on intensities corresponding to the tunneling regime and identify the main ionization mechanisms in this regime. We devise a selection of observables, such as the correlated momenta and the sum of the momenta parallel to the laser field as a function of the interelectronic angle of escape, where all the main mechanisms have distinct traces. Second, we address intensities above but close to the over-the-barrier intensity regime. We find a surprising anticorrelation of electron momenta similar to the experimental observations reported in Phys. Rev. Lett. 101, 053001 (2008) There, however, the anticorrelation was observed in very low intensities corresponding to the multiphoton regime. We discuss the mechanism responsible for the antiparallel two-electron escape.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Steacie Institute for Molecular Sciences
Peer reviewedYes
NPARC number15065642
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Record identifier77d69d66-7bb4-465c-9b51-79d8dad6d70f
Record created2010-05-03
Record modified2016-05-09
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