Manipulation of quantum paths for space–time characterization of attosecond pulses

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DOIResolve DOI: http://doi.org/10.1038/nphys2525
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TypeArticle
Journal titleNature Physics
ISSN1745-2473
1745-2481
Volume9
Issue3
Pages159163; # of pages: 5
AbstractAttosecond extreme-ultraviolet pulses have a complex space–time structure. However, at present, there is no method to observe this intricate detail; all measurements of the duration of attosecond pulses are, to some extent, spatially averaged. A technique for determining the full space–time structure would enable a detailed study of the highly nonlinear processes that generate these pulses as a function of intensity without averaging. Here, we introduce and demonstrate an all-optical method to measure the space–time characteristics of an isolated attosecond pulse. Our measurements show that intensity-dependent phase and quantum-path interference both play a key role in determining the pulse structure. In the generating medium, the attosecond pulse is strongly modulated in space and time. Propagation modifies but does not erase this modulation. Quantum-path interference of the single-atom response, previously obscured by spatial and temporal averaging, may enable measuring the laser-field-driven ion dynamics with sub-cycle resolution.
Publication date
LanguageEnglish
AffiliationSecurity and Disruptive Technologies; National Research Council Canada
Peer reviewedYes
Identifiernphys2525
NPARC number21270330
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Record identifierf268392e-2620-40f9-811b-bf5ea64d448f
Record created2014-01-30
Record modified2016-05-09
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