Revealing the cooper minimum of N2 by molecular frame high-harmonic spectroscopy

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DOIResolve DOI: http://doi.org/10.1103/PhysRevLett.109.143001
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TypeArticle
Journal titlePhysical Review Letters
ISSN0031-9007
Volume109
Issue14
Pages143001-1143001-5; # of pages: 5
AbstractMolecular frame high-harmonic spectra of aligned N2 molecules reveal a Cooper-like minimum. By deconvolving the laboratory frame alignment distribution, what was previously thought to be a maximum of emission along the molecular axis is found to be maxima at 35 degrees off axis, with a spectral minimum on axis. Both of these features are supported by photoionization calculations that underline the relationship between high-harmonic spectroscopy and photoionization measurements. The calculations reveal that the on axis spectral minimum is a Cooper-like minimum that arises from the destructive interference of the p and f partial wave contributions to high-harmonic photorecombination. Features such as Cooper minima and shape resonances are ubiquitous in molecular photoionization or recombination.
Publication date
PublisherAmerican Physical Society
LanguageEnglish
AffiliationSecurity and Disruptive Technologies; National Research Council Canada
Peer reviewedYes
NPARC number21268071
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Record identifier14896c42-e24f-4d74-8971-968ba0b43b96
Record created2013-04-08
Record modified2016-05-09
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