Excitation of confined modes on particle arrays
Excitation of confined modes on particle arrays
We describe both theoretically and experimentally the existence and excitation of confined modes in planar arrays of gold nanodisks. Ordered 2D lattices of monodispersive nanoparticles are manufactured, embedded in a silica matrix, and exposed to evanescent prism-coupling illumination, leading to dark features in the reflectivity, which signal the presence of confined modes guided along the arrays. We find remarkable agreement between theory and experiment in the frequency-momentum dispersion of the resonances. Direct excitation of these modes reveals long propagation distances and deep extinction features. This combined experimental and theoretical characterization of guided modes shows a good understanding of the optical response of metallic particles arrays, which can be beneficial in future designs of optical-signal and distant-sensing applications.
5636-5642
Bendaña, X.M.
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Lozano, G.
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Pirruccio, G.
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Gómez Rivas, J.
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García de Abajo, F.J.
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11 March 2013
Bendaña, X.M.
693b973e-a004-44a6-834e-8e15c654b7e8
Lozano, G.
0f1e493a-3a77-45ff-818a-8fe90f28605a
Pirruccio, G.
ca31a1e9-e0cc-4fec-8d74-6ce608e01aff
Gómez Rivas, J.
3051d9f6-dc75-43a3-8898-86a8d0e7470c
García de Abajo, F.J.
68958b41-966f-49ef-9578-d0ffa446b33e
Bendaña, X.M., Lozano, G., Pirruccio, G., Gómez Rivas, J. and García de Abajo, F.J.
(2013)
Excitation of confined modes on particle arrays.
Optics Express, 21 (5), .
(doi:10.1364/OE.21.005636).
Abstract
We describe both theoretically and experimentally the existence and excitation of confined modes in planar arrays of gold nanodisks. Ordered 2D lattices of monodispersive nanoparticles are manufactured, embedded in a silica matrix, and exposed to evanescent prism-coupling illumination, leading to dark features in the reflectivity, which signal the presence of confined modes guided along the arrays. We find remarkable agreement between theory and experiment in the frequency-momentum dispersion of the resonances. Direct excitation of these modes reveals long propagation distances and deep extinction features. This combined experimental and theoretical characterization of guided modes shows a good understanding of the optical response of metallic particles arrays, which can be beneficial in future designs of optical-signal and distant-sensing applications.
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oe-21-5-5636
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Published date: 11 March 2013
Organisations:
Optoelectronics Research Centre
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Local EPrints ID: 356330
URI: http://eprints.soton.ac.uk/id/eprint/356330
ISSN: 1094-4087
PURE UUID: 2e025f6a-5aa7-4150-bf9a-e79bf5ecd52e
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Date deposited: 12 Sep 2013 15:28
Last modified: 14 Mar 2024 14:47
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Contributors
Author:
X.M. Bendaña
Author:
G. Lozano
Author:
G. Pirruccio
Author:
J. Gómez Rivas
Author:
F.J. García de Abajo
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