Low-Energy Electron Emission in the Strong-Field Ionization of Rare Gas Clusters

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
Phys. Rev. Lett. 121, 063202 – Published 8 August 2018

Abstract

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 <4eV 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.

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  • Received 5 April 2018

DOI:https://doi.org/10.1103/PhysRevLett.121.063202

© 2018 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Bernd Schütte1,*, Christian Peltz2, Dane R. Austin1, Christian Strüber1, Peng Ye1, Arnaud Rouzée3, Marc J. J. Vrakking3, Nikolay Golubev4, Alexander I. Kuleff4,5, Thomas Fennel2,3,†, and Jon P. Marangos1,‡

  • 1Department of Physics, Imperial College London, South Kensington Campus, SW7 2AZ London, United Kingdom
  • 2Institute of Physics, University of Rostock, Albert-Einstein-Strasse 23, 18059 Rostock, Germany
  • 3Max-Born-Institut, Max-Born-Strasse 2A, 12489 Berlin, Germany
  • 4Theoretische Chemie, PCI, Universität Heidelberg, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany
  • 5ELI-ALPS, Budapesti út 5, H-6728 Szeged, Hungary

  • *bschutte@imperial.ac.uk
  • thomas.fennel@uni-rostock.de
  • j.marangos@imperial.ac.uk

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Issue

Vol. 121, Iss. 6 — 10 August 2018

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