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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 36, Iss. 3 — Feb. 1, 2011
  • pp: 358–360

Structure of plasmonic aerogel and the breakdown of the effective medium approximation

Michael D. W. Grogan, Susannah C. Heck, Katie M. Hood, Stefan A. Maier, and Tim A. Birks  »View Author Affiliations


Optics Letters, Vol. 36, Issue 3, pp. 358-360 (2011)
http://dx.doi.org/10.1364/OL.36.000358


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Abstract

A method for making aerogel doped with gold nanoparticles (GNPs) produces a composite material with a well-defined localized surface plasmon resonance peak at 520 nm . The width of the extinction feature indicates the GNPs are well dispersed in the aerogel, making it suited to optical study. A simple effective medium approximation cannot explain the peak extinction wavelengths. The plasmonic field extends on a scale where aerogel cannot be considered isotropic, so a new model is required: a 5 nm glass coating on the GNPs models the extinction spectrum of the composite material, with air (aerogel), methanol (alcogel), or toluene filling the pores.

© 2011 Optical Society of America

OCIS Codes
(160.4670) Materials : Optical materials
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Materials

History
Original Manuscript: October 27, 2010
Revised Manuscript: December 17, 2010
Manuscript Accepted: December 23, 2010
Published: January 28, 2011

Citation
Michael D. W. Grogan, Susannah C. Heck, Katie M. Hood, Stefan A. Maier, and Tim A. Birks, "Structure of plasmonic aerogel and the breakdown of the effective medium approximation," Opt. Lett. 36, 358-360 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-3-358


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