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Low-energy electron emission in the strong-field Ionization of rare gas clusters

Clusters and nanoparticles have been widely investigated to determine how plasmonic near fields influence the strong-field induced energetic electron emission from finite systems. We focus on the contrary, i.e., the slow electrons, and discuss a hitherto unidentified low-energy structure (LES) in th...

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Main Authors: Schütte, Bernd (Author) , Peltz, Christian (Author) , Austin, Dane R. (Author) , Strüber, Christian (Author) , Ye, Peng (Author) , Rouzée, Arnaud (Author) , Vrakking, Marc J. J. (Author) , Golubev, Nikolay V. (Author) , Kuleff, Alexander I. (Author) , Fennel, Thomas (Author) , Marangos, Jon P. (Author)
Format: Article (Journal)
Language:English
Published: 8 August 2018
In: Physical review letters
Year: 2018, Volume: 121, Issue: 6
ISSN:1079-7114
DOI:10.1103/PhysRevLett.121.063202
Online Access:Verlag, Volltext: https://doi.org/10.1103/PhysRevLett.121.063202
Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.121.063202
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Author Notes:Bernd Schütte, Christian Peltz, Dane R. Austin, Christian Strüber, Peng Ye, Arnaud Rouzée, Marc J.J. Vrakking, Nikolay Golubev, Alexander I. Kuleff, Thomas Fennel, and Jon P. Marangos
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Summary:Clusters and nanoparticles have been widely investigated to determine how plasmonic near fields influence the strong-field induced energetic electron emission from finite systems. We focus on the contrary, i.e., the slow electrons, and discuss a hitherto unidentified low-energy structure (LES) in the photoemission spectra of rare gas clusters in intense near-infrared laser pulses. For Ar and Kr clusters we find, besides field-driven fast electrons, a robust and nearly isotropic emission of electrons with <4 eV kinetic energies that dominates the total yield. Molecular dynamics simulations reveal a correlated few-body decay process involving quasifree electrons and multiply excited ions in the nonequilibrium nanoplasma that results in a dominant LES feature. Our results indicate that the LES emission occurs after significant nanoplasma expansion, and that it is a generic phenomenon in intense laser nanoparticle interactions, which is likely to influence the formation of highly charged ions.
Item Description:Gesehen am 02.09.2019
Physical Description:Online Resource
ISSN:1079-7114
DOI:10.1103/PhysRevLett.121.063202

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