Surface plasmons at composite surfaces with diffusive charges

B. Horovitz, C. Henkel

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Metal surfaces with disorder or with nanostructure modifications are studied, allowing for a localized charge layer (CL) in addition to continuous charges (CC) in the bulk, both charges having a compressional or diffusive nonlocal response. The notorious problem of "additional boundary conditions" is resolved with the help of a Boltzmann equation that involves the scattering between the two charge types. Depending on the strength of this scattering, the oscillating charges can be dominantly CC or CL; the surface plasmon (SP) resonance acquires then a relatively small linewidth, in agreement with a large set of data. With a few parameters our model describes a large variety of SP dispersions corresponding to observed data.

Original languageEnglish
Article number57010
JournalEPL
Volume97
Issue number5
DOIs
StatePublished - 1 Mar 2012

ASJC Scopus subject areas

  • General Physics and Astronomy

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