Guided plasmonic modes in nanorod assemblies: strong electromagnetic coupling regime

We demonstrate that the coupling between plasmonic modes of oriented metallic nanorods results in the formation of an extended (guided) plasmonic mode of the nanorod array. The electromagnetic field distribution associated to this mode is found to be concentrated between the nanorods within the asse...

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Bibliographic Details
Published inOptics express Vol. 16; no. 10; pp. 7460 - 7470
Main Authors Wurtz, G A, Dickson, W, O'Connor, D, Atkinson, R, Hendren, W, Evans, P, Pollard, R, Zayats, A V
Format Journal Article
LanguageEnglish
Published United States 12.05.2008
Subjects
Anisotropy
Chemistry, Physical - methods
Electromagnetic Fields
Electromagnetic Phenomena - instrumentation
Equipment Design
Gold - chemistry
Metal Nanoparticles
Microscopy, Electron, Scanning
Nanotechnology - instrumentation
Nanotechnology - methods
Nanotubes
Optics and Photonics
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Summary:We demonstrate that the coupling between plasmonic modes of oriented metallic nanorods results in the formation of an extended (guided) plasmonic mode of the nanorod array. The electromagnetic field distribution associated to this mode is found to be concentrated between the nanorods within the assembly and propagates normally to the nanorod long axes, similar to a photonic mode waveguided by an anisotropic slab. This collective plasmonic mode determines the optical properties of nanorod assemblies and can be tuned in a wide spectral range by changing the nanorod array geometry. This geometry represents a unique opportunity for light guiding applications and manipulation at the nanoscale as well as sensing applications and development of molecular plasmonic devices.
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ISSN:1094-4087
DOI:10.1364/OE.16.007460