Volume 61, Number 4, February 2003
|Page(s)||541 - 546|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 February 2003|
Onset of charge localisation on coupling multipolar absorption modes in supported metal particles
Laboratoire CNRS/Saint-Gobain “Surface du Verre et Interfaces” F-93303 Aubervilliers, France
2 CEA Grenoble, DRFMC/SP2M/IRS - F-38054 Grenoble, France
3 Department of Physics, The Norwegian University of Science and Technology N-7034 Trondheim, Norway
Accepted: 2 December 2002
An experimental evidence of the local enhancement of the electric field on supported metal nanoparticles is given in the case of a silver thin film growing on alumina, as studied in situ by surface differential reflectance. The dynamic charge localisation is driven by the inter-particle coupling of the multipolar plasmon absorption modes. Those modes and the associated polarisation charges are assigned via the modeling of the optical response.
PACS: 78.20.Bh – Theory, models, and numerical simulation / 61.46.+w – Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals / 73.20.Mf – Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)
© EDP Sciences, 2003
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