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Extreme Ultraviolet Beam Enhancement by Relativistic Surface Plasmons

Cantono, G. LU ; Fedeli, L. ; Sgattoni, A. ; Denoeud, A. ; Chopineau, L. ; Réau, F. ; Ceccotti, T. and Macchi, A. (2018) In Physical Review Letters 120(26).
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.... (More)

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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publishing date
type
Contribution to journal
publication status
published
in
Physical Review Letters
volume
120
issue
26
article number
264803
publisher
American Physical Society
external identifiers
  • scopus:85049373731
ISSN
0031-9007
DOI
10.1103/PhysRevLett.120.264803
language
English
LU publication?
no
id
5bd743e3-da6c-40be-a2f7-b03c2dda20b0
date added to LUP
2019-05-16 14:34:41
date last changed
2020-12-29 02:29:53
@article{5bd743e3-da6c-40be-a2f7-b03c2dda20b0,
  abstract     = {<p>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.</p>},
  author       = {Cantono, G. and Fedeli, L. and Sgattoni, A. and Denoeud, A. and Chopineau, L. and Réau, F. and Ceccotti, T. and Macchi, A.},
  issn         = {0031-9007},
  language     = {eng},
  month        = {06},
  number       = {26},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Extreme Ultraviolet Beam Enhancement by Relativistic Surface Plasmons},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.120.264803},
  doi          = {10.1103/PhysRevLett.120.264803},
  volume       = {120},
  year         = {2018},
}