Nanostructure-Mediated Launching and Detection of 2D Surface Plasmons

Au nanoparticles deposited on a metallic film act as nanoantenna receivers and transmitters for the coupling of free-space radiation into, and out of, 2D surface plasmons. Nanosteps, sub-10-nm gaps between metallic films of differing thickness, can also launch and detect surface plasmons. Here we us...

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Bibliographic Details
Published inACS nano Vol. 4; no. 12; pp. 7566 - 7572
Main Authors Day, Jared K, Neumann, Oara, Grady, Nathaniel K, Halas, Naomi J
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 28.12.2010
Subjects
propagation length
transmission
plasmonics
SERS
waveguides
metallic film
plasmon hybridization
nanogap
near-field coupling
surface plasmons
nanoparticle
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Summary:Au nanoparticles deposited on a metallic film act as nanoantenna receivers and transmitters for the coupling of free-space radiation into, and out of, 2D surface plasmons. Nanosteps, sub-10-nm gaps between metallic films of differing thickness, can also launch and detect surface plasmons. Here we use both types of structures to locally launch propagating surface plasmon waves and probe their properties. Nanoparticle-launched surface plasmons emerge as two lobes of nominally 90 degree angular width, propagating along the direction of incident polarization. Alternatively, plasmons can be launched unidirectionally, by asymmetric illumination of a nanoparticle receiver.
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ISSN:1936-0851
1936-086X
DOI:10.1021/nn102003c