Transverse and longitudinal surface plasmon resonances of a hexagonal array of gold nanorods embedded in an alumina matrix

B.G. McMillan, L.E.A. Berlouis, F.R. Cruickshank, D. Pugh, P.F. Brevet

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Abstract

The specular reflectance from a hexagonal array of gold nanorods embedded in an alumina matrix supported on an aluminum substrate is reported. The rods were grown by electrodeposition of gold in an alumina template and were oriented with their long axis perpendicular to the film surface. Optical reflectance measurements performed with an incident light beam of S polarization only exhibited the transverse surface plasmon resonance whereas the measurements obtained with P polarization exhibited both transverse and longitudinal resonances. A model for the reflectance from a thin anisotropic film was developed and shown to be in agreement with the experimental data.
Original languageEnglish
Pages (from-to)211912
Number of pages3
JournalApplied Physics Letters
Volume86
Issue number21
DOIs
Publication statusPublished - May 2005

Keywords

  • gold
  • insulating thin films
  • porous materials
  • refractive index
  • nanostructured materials
  • alumina

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