Time delays from one-photon transitions in the continuum

Attosecond photoionization time delays reveal information about the potential energy landscape that an outgoing electron wavepacket probes upon ionization. In this study, we experimentally quantify the dependence of the time delay on the angular momentum of the liberated photoelectrons. For this pur...

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Authors: Fuchs, Jaco, Douguet, Nicolas, Donsa, Stefan, Martín García, Fernando, Burgdörfer, Joachim, Argenti, Luca, Cattaneo, Laura, Keller, Ursula
Format: article
Publication Date:2020
Country:España
Institution:Universidad Autónoma de Madrid
Repository:Biblos-e Archivo. Repositorio Institucional de la UAM
Language:English
OAI Identifier:oai:repositorio.uam.es:10486/691105
Online Access:http://hdl.handle.net/10486/691105
https://dx.doi.org/10.1364/OPTICA.378639
Access Level:Open access
Keyword:Photoelectrons
Ionization threshold
Quantum pathways
Photoionization
Química
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spelling Time delays from one-photon transitions in the continuumFuchs, JacoDouguet, NicolasDonsa, StefanMartín García, FernandoBurgdörfer, JoachimArgenti, LucaCattaneo, LauraKeller, UrsulaPhotoelectronsIonization thresholdQuantum pathwaysPhotoionizationQuímicaAttosecond photoionization time delays reveal information about the potential energy landscape that an outgoing electron wavepacket probes upon ionization. In this study, we experimentally quantify the dependence of the time delay on the angular momentum of the liberated photoelectrons. For this purpose, we resolved electron quantum-path interference spectra in energy and angle using a two-color attosecond pump–probe photoionization experiment in helium. A fitting procedure of the angle-dependent interference pattern allows us to disentangle the relative phase of all four quantum pathways that are known to contribute to the final photoelectron signal. In particular, we resolve the dependence on angular momentum of the delay of one-photon transitions between continuum states, which is an essential and universal contribution to the total photoionization delay observed in attosecond pump–probe measurements. For such continuum–continuum transitions, we measure a delay between outgoing s and d electrons as large as 12 attoseconds, close to the ionization threshold in helium. Both single-active-electron and first-principles ab initio simulations confirm this observation for helium and hydrogen, demonstrating the universality of the observed delaysNational Science Foundation (1607588); University of Central Florida (24089045); Vienna Science and Technology Fund (MA14-002); Austrian Science Fund (FWF- W1243-Solids4Fun, FWF-SFB041-VICOM, IMPRS-APS); Ministerio de Economía y Competitividad (FIS2016-77889-R, MDM-2014-0377, SEV-2016-0686); Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (NCCR MUST)Optical Society of AmericaDepartamento de QuímicaFacultad de Ciencias20202020-02-20research articlehttp://purl.org/coar/resource_type/c_2df8fbb1VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10486/691105https://dx.doi.org/10.1364/OPTICA.378639reponame:Biblos-e Archivo. Repositorio Institucional de la UAMinstname:Universidad Autónoma de MadridInglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:repositorio.uam.es:10486/6911052026-06-23T12:46:27Z
dc.title.none.fl_str_mv Time delays from one-photon transitions in the continuum
title Time delays from one-photon transitions in the continuum
spellingShingle Time delays from one-photon transitions in the continuum
Fuchs, Jaco
Photoelectrons
Ionization threshold
Quantum pathways
Photoionization
Química
title_short Time delays from one-photon transitions in the continuum
title_full Time delays from one-photon transitions in the continuum
title_fullStr Time delays from one-photon transitions in the continuum
title_full_unstemmed Time delays from one-photon transitions in the continuum
title_sort Time delays from one-photon transitions in the continuum
dc.creator.none.fl_str_mv Fuchs, Jaco
Douguet, Nicolas
Donsa, Stefan
Martín García, Fernando
Burgdörfer, Joachim
Argenti, Luca
Cattaneo, Laura
Keller, Ursula
author Fuchs, Jaco
author_facet Fuchs, Jaco
Douguet, Nicolas
Donsa, Stefan
Martín García, Fernando
Burgdörfer, Joachim
Argenti, Luca
Cattaneo, Laura
Keller, Ursula
author_role author
author2 Douguet, Nicolas
Donsa, Stefan
Martín García, Fernando
Burgdörfer, Joachim
Argenti, Luca
Cattaneo, Laura
Keller, Ursula
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Departamento de Química
Facultad de Ciencias
dc.subject.none.fl_str_mv Photoelectrons
Ionization threshold
Quantum pathways
Photoionization
Química
topic Photoelectrons
Ionization threshold
Quantum pathways
Photoionization
Química
description Attosecond photoionization time delays reveal information about the potential energy landscape that an outgoing electron wavepacket probes upon ionization. In this study, we experimentally quantify the dependence of the time delay on the angular momentum of the liberated photoelectrons. For this purpose, we resolved electron quantum-path interference spectra in energy and angle using a two-color attosecond pump–probe photoionization experiment in helium. A fitting procedure of the angle-dependent interference pattern allows us to disentangle the relative phase of all four quantum pathways that are known to contribute to the final photoelectron signal. In particular, we resolve the dependence on angular momentum of the delay of one-photon transitions between continuum states, which is an essential and universal contribution to the total photoionization delay observed in attosecond pump–probe measurements. For such continuum–continuum transitions, we measure a delay between outgoing s and d electrons as large as 12 attoseconds, close to the ionization threshold in helium. Both single-active-electron and first-principles ab initio simulations confirm this observation for helium and hydrogen, demonstrating the universality of the observed delays
publishDate 2020
dc.date.none.fl_str_mv 2020
2020-02-20
dc.type.none.fl_str_mv research article
http://purl.org/coar/resource_type/c_2df8fbb1
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10486/691105
https://dx.doi.org/10.1364/OPTICA.378639
url http://hdl.handle.net/10486/691105
https://dx.doi.org/10.1364/OPTICA.378639
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Optical Society of America
publisher.none.fl_str_mv Optical Society of America
dc.source.none.fl_str_mv reponame:Biblos-e Archivo. Repositorio Institucional de la UAM
instname:Universidad Autónoma de Madrid
instname_str Universidad Autónoma de Madrid
reponame_str Biblos-e Archivo. Repositorio Institucional de la UAM
collection Biblos-e Archivo. Repositorio Institucional de la UAM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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