Revealing the cooper minimum of N 2 by molecular frame high-harmonic spectroscopy. Bertrand, J., Wörner, H., Hockett, P., Villeneuve, D., & Corkum, P. Physical Review Letters, 2012.
Revealing the cooper minimum of N 2 by molecular frame high-harmonic spectroscopy [link]Paper  doi  abstract   bibtex   
Molecular frame high-harmonic spectra of aligned N 2 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. Published by the American Physical Society. © Published by the American Physical Society.
@Article{Bertrand2012,
  author        = {Bertrand, J.B.a , Wörner, H.J.b , Hockett, P.a , Villeneuve, D.M.a , Corkum, P.B.a},
  journal       = {Physical Review Letters},
  title         = {Revealing the cooper minimum of N 2 by molecular frame high-harmonic spectroscopy},
  year          = {2012},
  number        = {14},
  volume        = {109},
  abstract      = {Molecular frame high-harmonic spectra of aligned N 2 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. Published by the American Physical Society. © Published by the American Physical Society.},
  affiliation   = {Joint Attosecond Science Laboratory, National Research Council of Canada, University of Ottawa, 100 Sussex Drive, Ottawa, K1A 0R6, Canada; Laboratorium für Physikalische Chemie, ETH Zürich, Wolfgang-Pauli-Strasse 10, 8093 Zürich, Switzerland},
  art_number    = {143001},
  document_type = {Article},
  doi           = {10.1103/PhysRevLett.109.143001},
  source        = {Scopus},
  timestamp     = {2016.03.02},
  url           = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84867060251&partnerID=40&md5=9c5158fadf5d3af58c24a34b285bcf97},
}

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