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Proceedings Paper

Ultrafast surface plasmon resonance Landau damping and electron kinetics in metal nanoparticles
Author(s): Cyril Guillon; Pierre Langot; Natalia Del Fatti; Fabrice Vallee
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Paper Abstract

Ultrafast excitation of nonequilibrium quasi-free electrons by a femtosecond pulse and the first steps of their relaxation are studied in noble metal nanoparticles. Coherent electron-optical pulse coupling in or our of resonance with the surface plasmon resonance is shown to decay by single electron excitation (Landau damping) on a sub- 10 fs scale. This process is detected by monitoring transient depopulation of electron states well below the Fermi energy, in agreement with the free-electron optical absorption model. The subsequent loss of energy of the created nonequilibrium electron distribution show a particle size dependent slowing-down of the energy transfer to the lattice on a subpicosecond scale. These results are in quantitative agreement with numerical simulations of the athermal electron kinetics.

Paper Details

Date Published: 16 June 2004
PDF: 12 pages
Proc. SPIE 5352, Ultrafast Phenomena in Semiconductors and Nanostructure Materials VIII, (16 June 2004); doi: 10.1117/12.532218
Show Author Affiliations
Cyril Guillon, CMPOH/CNRS, Univ. Bordeaux I (France)
Pierre Langot, CMPOH/CNRS, Univ. Bordeaux I (France)
Natalia Del Fatti, CMPOH/CNRS, Univ. Bordeaux I (France)
Fabrice Vallee, CMPOH/CNRS, Univ. Bordeaux I (France)

Published in SPIE Proceedings Vol. 5352:
Ultrafast Phenomena in Semiconductors and Nanostructure Materials VIII
Kong-Thon Tsen; Jin-Joo Song; Hongxing Jiang, Editor(s)

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