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Title: Modeling ultrashort laser-induced emission from a negatively biased metal

A theoretical study of ultrashort laser-induced electron emission from a negatively biased metallic cathode has been performed. Classical as well as tunneling electron emission mechanisms are considered. It was found that electron emission is governed by an interplay of processes inside as well as above the cathode. A hybrid model is proposed, where the electron distribution within the target is retrieved from Boltzmann scattering integrals, while the charge distribution above it is studied by a Particle-In-Cell simulation. The results indicate that non-equilibrium effects determine the initial emission process, whereas the space charge above the target suppresses the effectively emitted charge.
Authors:
;  [1] ; ;  [2] ;  [1] ;  [3]
  1. Research Group PLASMANT, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk (Belgium)
  2. Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, Erwin-Schrödinger-Straße 46, 67663 Kaiserslautern (Germany)
  3. (Germany)
Publication Date:
OSTI Identifier:
22253949
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 22; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CATHODES; CHARGE DISTRIBUTION; DISTRIBUTION; ELECTRON EMISSION; ELECTRONS; LASERS; METALS; SCATTERING; SIMULATION; SPACE CHARGE; TUNNEL EFFECT