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

Physical Review Letters
Bernd SchütteJon P Marangos

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 <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.

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Dec 23, 2016·Scientific Reports·Bernd SchütteJon P Marangos
Jan 14, 2017·Physical Review Letters·D IablonskyiK Ueda
Apr 26, 2018·Physical Review Letters·D KomarJ Tiggesbäumker

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Citations

Aug 28, 2020·Physical Review Letters·YanLan WangMarkus Kitzler-Zeiler
Jun 4, 2019·The Journal of Chemical Physics·M KelbgJ Tiggesbäumker
Jan 28, 2021·Nature Communications·Tobias KrokerJuliette Simonet

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