Attosecond photoelectron interference in the separable Coulomb-Volkov continuum

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DOIResolve DOI: http://doi.org/10.1088/0953-4075/40/5/F03
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TypeArticle
Journal titleJournal of Physics B: Atomic, Molecular and Optical Physics
ISSN0953-4075
Volume40
Issue5
Article numberF03
PagesF93F103
SubjectContinuum mechanics; Coulomb interactions; Parameter estimation; Photoelectrons; Quantum theory; Wave functions; X rays; Coulomb-Volkov continuum; Photoelectron interferences; Temporal separation; Volkov continuum solutions; X-ray parameters; Electromagnetic wave interference
AbstractWe develop a description of laser-assisted x-ray photoionization based on a sudden approximation approach. By splitting the system evolution into three time stages we find necessary and sufficient conditions for spatial and temporal separation of Coulomb and Volkov continuum solutions. Using the separable Coulomb-Volkov wavefunction we present an analytical non-relativistic quantum theory of attosecond photoionization. It applies for arbitrary x-ray parameters, with both Coulomb continuum and laser field treated non-perturbatively. The theory provides a firm basis for characterizing photoelectron phase and atomic and molecular wavefunctions, by extracting them from experimental data. Using the molecular hydrogen ion as a test case, we display a variety of photoelectron interference sources in energy- and angular-resolved spectra for different pulse durations, chirps and delay times between x-ray pulse replicas.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada
Peer reviewedYes
NPARC number21276170
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Record identifier4711111e-7deb-4b5b-84eb-38a3234cf7ef
Record created2015-09-28
Record modified2016-05-09
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