Extreme Ultraviolet Beam Enhancement by Relativistic Surface Plasmons

G. Cantono, L. Fedeli, A. Sgattoni, A. Denoeud, L. Chopineau, F. Réau, T. Ceccotti, and A. Macchi
Phys. Rev. Lett. 120, 264803 – Published 28 June 2018
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Abstract

The emission of high-order harmonics in the extreme ultraviolet range from the interaction of a short, intense laser pulse with a grating target is investigated experimentally. When resonantly exciting a surface plasmon, both the intensity and the highest order observed for the harmonic emission along the grating surface increase with respect to a flat target. Harmonics are obtained when a suitable density gradient is preformed at the target surface, demonstrating the possibility to manipulate the grating profile on a nanometric scale without preventing the surface plasmon excitation. In support of this, the harmonic emission is spatiotemporally correlated to the acceleration of multi-MeV electron bunches along the grating surface. Particle-in-cell simulations reproduce the experimental results and give insight on the mechanism of high harmonic generation in the presence of surface plasmons.

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  • Received 31 March 2018

DOI:https://doi.org/10.1103/PhysRevLett.120.264803

© 2018 American Physical Society

Physics Subject Headings (PhySH)

Plasma Physics

Authors & Affiliations

G. Cantono1,2,3,4,*, L. Fedeli5, A. Sgattoni6,7, A. Denoeud1, L. Chopineau1, F. Réau1, T. Ceccotti1, and A. Macchi3,4

  • 1LIDYL, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France
  • 2Université Paris Sud, Paris, 91400 Orsay, France
  • 3National Institute of Optics, National Research Council (CNR/INO) A. Gozzini unit, 56124 Pisa, Italy
  • 4Enrico Fermi Department of Physics, University of Pisa, 56127 Pisa, Italy
  • 5Department of Energy, Politecnico di Milano, 20133 Milano, Italy
  • 6LULI-UPMC: Sorbonne Universités, CNRS, École Polytechnique, CEA, 75005 Paris, France
  • 7LESIA, Observatoire de Paris, CNRS, UPMC: Sorbonne Universites, 92195 Meudon, France

  • *giada.cantono@fysik.lth.se

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Issue

Vol. 120, Iss. 26 — 29 June 2018

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