Comparison and real-time monitoring of high-order harmonic generation in different sources

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DOIResolve DOI: http://doi.org/10.1103/PhysRevA.79.033404
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TypeArticle
Journal titlePhysical Review A
Volume79
Issue3
Pages033404-1033404-6; # of pages: 6
Subjectultraviolet photons; photoionization; attosecond
AbstractWe compare the generation of coherent extreme ultraviolet (xuv) photons in argon from three different high-order harmonic sources: a semi-infinite gas cell, a finite gas cell, and a pulsed valve. We demonstrate photoionization of the background gas by the coherent xuv photons as an alternative to xuv spectroscopy for real-time and in-line monitoring of the high-order harmonics. Using this technique for measuring photocurrent, we show that the gas cells produce 50–100-fold brighter harmonics than the pulsed valve, with an estimated conversion efficiency of 10⁻⁴. The spectral distribution of the harmonics produced in the gas cells peaks at the 27th harmonic compared to the 19th harmonic in the pulsed valve. We attribute this difference to the interplay between phase matching and absorption.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; NRC Steacie Institute for Molecular Sciences
Peer reviewedYes
NPARC number15201046
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Record identifier2a614369-2048-45a5-a367-c70a1de0bdbc
Record created2010-07-12
Record modified2016-05-09
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