Surface plasmons at composite surfaces with diffusive charges
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 non-local 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.
Cite
@article{arxiv.1109.3763,
title = {Surface plasmons at composite surfaces with diffusive charges},
author = {Baruch Horovitz and Carsten Henkel},
journal= {arXiv preprint arXiv:1109.3763},
year = {2012}
}
Comments
6 pages, 2 figures