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dc.contributor.author
Arbo, Diego
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dc.contributor.author
López, Sebastián David
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dc.contributor.author
Burgdörfer, Joachim
dc.date.available
2023-11-10T15:32:22Z
dc.date.issued
2022-11
dc.identifier.citation
Arbo, Diego; López, Sebastián David; Burgdörfer, Joachim; Semiclassical strong-field theory of phase delays in ω-2ω above-threshold ionization; American Physical Society; Physical Review A; 106; 5; 11-2022; 1-14
dc.identifier.issn
2469-9926
dc.identifier.uri
http://hdl.handle.net/11336/217783
dc.description.abstract
Phase and time delays of atomic above-threshold ionization were recently experimentally explored in an ω-2ω setting [Zipp, Optica 1, 361 (2014)2334-253610.1364/OPTICA.1.000361]. The phases of wave packets ejected from argon by a strong 2ω pulse were probed as a function of the relative phase of a weaker ω probe pulse. Numerical simulations solving the time-dependent Schrödinger equation (TDSE) displayed a sensitive dependence of the doubly differential momentum distribution on the relative phase between the ω and 2ω fields. Moreover, a surprisingly strong variation of the extracted phase delays on the intensity of the probe pulse was found. We present a semiclassical strong-field description of the phase delays in the emission of electrons in an ω-2ω setting and apply it to atomic hydrogen. Nonperturbative effects in both the 2ω pump and the ω probe field are included. The semiclassical description allows tracing phase delays to path interferences between emission during different points in time of emission within the temporal unit cell of the two-color laser field. We find good agreement between the semiclassical saddle-point approximation, the full strong-field approximation (SFA), and previous results applicable in the perturbative limit of probe fields. We show that the RABBIT-like perturbative description of phase delays breaks down for stronger fields and higher-energy electron emission. In this regime, characterization of the ionization signal requires an entire ensemble of phase delays δi(E) with i=1,2,... the difference in photon numbers of the strong 2ω field involved in the interfering paths. Comparison between SFA and TDSE calculations reveals the influence of the Coulomb field even in this strong-field scenario.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Physical Society
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
SEMICLASSICAL
dc.subject
DELAYS
dc.subject
PHOTOIONIZATION
dc.subject.classification
Física Atómica, Molecular y Química
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dc.subject.classification
Ciencias Físicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Semiclassical strong-field theory of phase delays in ω-2ω above-threshold ionization
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-11-09T13:46:54Z
dc.identifier.eissn
2469-9934
dc.journal.volume
106
dc.journal.number
5
dc.journal.pagination
1-14
dc.journal.pais
Estados Unidos
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dc.journal.ciudad
New York
dc.description.fil
Fil: Arbo, Diego. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
dc.description.fil
Fil: López, Sebastián David. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
dc.description.fil
Fil: Burgdörfer, Joachim. Vienna University of Technology; Austria
dc.journal.title
Physical Review A
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/pra/abstract/10.1103/PhysRevA.106.053101
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1103/PhysRevA.106.053101
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