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, Paul A. Midgley

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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 nanorodsilicon nitride system show the importance of including retardation and substrate effects in order to describe accurately the energy dispersion of the resonant modes. © 2011 Optical Society of America.
Original languageEnglish
JournalOptics Express
Volume19
Issue number16
Pages (from-to)15371-15379
ISSN1094-4087
DOIs
Publication statusPublished - 2011

Bibliographical note

This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/abstract.cfm?URI=oe-19-16-15371. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

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