Distance-dependent plasmon resonant coupling between a gold nanoparticle and gold film.

Journal Article

We present an experimental analysis of the plasmonic scattering properties of gold nanoparticles controllably placed nanometers away from a gold metal film. We show that the spectral response of this system results from the interplay between the localized plasmon resonance of the nanoparticle and the surface plasmon polaritons of the gold film, as previously predicted by theoretical studies. In addition, we report that the metal film induces a polarization to the single nanoparticle light scattering, resulting in a doughnut-shaped point spread function when imaged in the far-field. Both the spectral response and the polarization effects are highly sensitive to the nanoparticle-film separation distance. Such a system shows promise in potential biometrology and diagnostic devices.

Full Text

Duke Authors

Cited Authors

  • Mock, JJ; Hill, RT; Degiron, A; Zauscher, S; Chilkoti, A; Smith, DR

Published Date

  • August 2008

Published In

Volume / Issue

  • 8 / 8

Start / End Page

  • 2245 - 2252

PubMed ID

  • 18590340

Pubmed Central ID

  • 18590340

Electronic International Standard Serial Number (EISSN)

  • 1530-6992

International Standard Serial Number (ISSN)

  • 1530-6984

Digital Object Identifier (DOI)

  • 10.1021/nl080872f

Language

  • eng