Phase sensitivity of high harmonic transient grating spectroscopy

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DOIResolve DOI: http://doi.org/10.1088/0953-4075/43/6/065401
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TypeArticle
Journal titleJournal of Physics B, Atomic, Molecular and Optical Physics
Volume43
Issue6
Pages15; # of pages: 5
AbstractWe study the spatial profile of high order harmonics generated by a transient grating of rotational excitation. We show that the phase modulation of the harmonic emission as a function of molecular alignment is encoded in the diffraction pattern. In molecular nitrogen, the phase difference between aligned and isotropic molecules decreases from 1.6 rad for harmonic 19 to less than 0.3 rad for harmonic 27. In CO2 we observe a strong phase jump for the highest harmonics. The position of this phase jump in the harmonic spectrum depends on the laser intensity, reflecting the contribution from multiple molecular orbitals to the harmonic emission.
Publication date
LanguageEnglish
AffiliationNRC Steacie Institute for Molecular Sciences; National Research Council Canada
Peer reviewedYes
NPARC number14829316
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Record identifier604dbfb8-46ef-4d22-9481-e6b3ab420aea
Record created2010-03-25
Record modified2016-05-09
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