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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 16 — Aug. 1, 2011
  • pp: 15371–15379

Surface plasmon modes of a single silver nanorod: an electron energy loss study

Olivia Nicoletti, Martijn Wubs, N. Asger Mortensen, Wilfried Sigle, Peter A. van Aken, and Paul A. Midgley  »View Author Affiliations


Optics Express, Vol. 19, Issue 16, pp. 15371-15379 (2011)
http://dx.doi.org/10.1364/OE.19.015371


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Abstract

We present an electron energy loss study using energy filtered TEM of spatially resolved surface plasmon excitations on a silver nanorod of aspect ratio 14.2 resting on a 30 nm thick silicon nitride membrane. Our results show that the excitation is quantized as resonant modes whose intensity maxima vary along the nanorod’s length and whose wavelength becomes compressed towards the ends of the nanorod. Theoretical calculations modelling the surface plasmon response of the silver nanorod-silicon nitride system show the importance of including retardation and substrate effects in order to describe accurately the energy dispersion of the resonant modes.

© 2011 OSA

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(300.6330) Spectroscopy : Spectroscopy, inelastic scattering including Raman
(160.4236) Materials : Nanomaterials
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Optics at Surfaces

History
Original Manuscript: June 24, 2011
Manuscript Accepted: July 12, 2011
Published: July 26, 2011

Citation
Olivia Nicoletti, Martijn Wubs, N. Asger Mortensen, Wilfried Sigle, Peter A. van Aken, and Paul A. Midgley, "Surface plasmon modes of a single silver nanorod: an electron energy loss study," Opt. Express 19, 15371-15379 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-16-15371


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