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Anisotropic photoemission time delays close to a Fano resonance

Cirelli, Claudio; Marante, Carlos; Heuser, Sebastian; Petersson, C. L.M.; Galán, Álvaro Jiménez; Argenti, Luca; Zhong, Shiyang LU ; Busto, David LU ; Isinger, Marcus LU and Nandi, Saikat LU , et al. (2018) In Nature Communications 9(1).
Abstract

Electron correlation and multielectron effects are fundamental interactions that govern many physical and chemical processes in atomic, molecular and solid state systems. The process of autoionization, induced by resonant excitation of electrons into discrete states present in the spectral continuum of atomic and molecular targets, is mediated by electron correlation. Here we investigate the attosecond photoemission dynamics in argon in the 20-40 eV spectral range, in the vicinity of the 3s-1np autoionizing resonances. We present measurements of the differential photoionization cross section and extract energy and angle-dependent atomic time delays with an attosecond interferometric method. With the support of a theoretical... (More)

Electron correlation and multielectron effects are fundamental interactions that govern many physical and chemical processes in atomic, molecular and solid state systems. The process of autoionization, induced by resonant excitation of electrons into discrete states present in the spectral continuum of atomic and molecular targets, is mediated by electron correlation. Here we investigate the attosecond photoemission dynamics in argon in the 20-40 eV spectral range, in the vicinity of the 3s-1np autoionizing resonances. We present measurements of the differential photoionization cross section and extract energy and angle-dependent atomic time delays with an attosecond interferometric method. With the support of a theoretical model, we are able to attribute a large part of the measured time delay anisotropy to the presence of autoionizing resonances, which not only distort the phase of the emitted photoelectron wave packet but also introduce an angular dependence.

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Nature Communications
volume
9
issue
1
publisher
Nature Publishing Group
external identifiers
  • scopus:85043244949
ISSN
2041-1723
DOI
10.1038/s41467-018-03009-1
language
English
LU publication?
yes
id
044e91f5-35c3-4d65-bc86-c4b390d3e3b9
date added to LUP
2018-03-19 14:18:12
date last changed
2019-03-24 04:45:06
@article{044e91f5-35c3-4d65-bc86-c4b390d3e3b9,
  abstract     = {<p>Electron correlation and multielectron effects are fundamental interactions that govern many physical and chemical processes in atomic, molecular and solid state systems. The process of autoionization, induced by resonant excitation of electrons into discrete states present in the spectral continuum of atomic and molecular targets, is mediated by electron correlation. Here we investigate the attosecond photoemission dynamics in argon in the 20-40 eV spectral range, in the vicinity of the 3s<sup>-1</sup>np autoionizing resonances. We present measurements of the differential photoionization cross section and extract energy and angle-dependent atomic time delays with an attosecond interferometric method. With the support of a theoretical model, we are able to attribute a large part of the measured time delay anisotropy to the presence of autoionizing resonances, which not only distort the phase of the emitted photoelectron wave packet but also introduce an angular dependence.</p>},
  articleno    = {955},
  author       = {Cirelli, Claudio and Marante, Carlos and Heuser, Sebastian and Petersson, C. L.M. and Galán, Álvaro Jiménez and Argenti, Luca and Zhong, Shiyang and Busto, David and Isinger, Marcus and Nandi, Saikat and MacLot, Sylvain and Rading, Linnea and Johnsson, Per and Gisselbrecht, Mathieu and Lucchini, Matteo and Gallmann, Lukas and Dahlström, J. Marcus and Lindroth, Eva and L'Huillier, Anne and Martín, Fernando and Keller, Ursula},
  issn         = {2041-1723},
  language     = {eng},
  month        = {12},
  number       = {1},
  publisher    = {Nature Publishing Group},
  series       = {Nature Communications},
  title        = {Anisotropic photoemission time delays close to a Fano resonance},
  url          = {http://dx.doi.org/10.1038/s41467-018-03009-1},
  volume       = {9},
  year         = {2018},
}