Easily coupled whispering gallery plasmons in dielectric nanospheres embedded in gold films
Easily coupled whispering gallery plasmons in dielectric nanospheres embedded in gold films
A new self-aligned robust method for coupling to whispering gallery modes (WGMs) of submicron microspheres utilizes their periodic arrangement without relying on nanopositioned external coupling devices. The microspheres are embedded in a nanostructured gold surface supporting delocalized plasmonic crystal modes that mediate the coupling, and can be tuned by the geometry. Detailed measurements of the angle- and orientation-dependent reflectivity reveal localized plasmonic WGMs whose energies scale with sphere diameter and agree closely with Mie calculations. Coupling between these plasmonic WGMs leads to mode splitting and the formation of plasmonic minibands of a controllable bandwidth.
137401-[4pp]
Cole, R.M.
8e80533f-f2f5-4b8e-bd02-d9807568728b
Sugawara, Y.
585b662a-5e52-4e03-ba20-8a9f602fcb4b
Baumberg, J.J.
78e1ea7e-8c70-404c-bf84-59aafe75cd07
Mahajan, S.
b131f40a-479e-4432-b662-19d60d4069e9
Abdelsalam, M.
19db11cd-6edc-4f00-abd0-ff307e986b35
Bartlett, P.N.
d99446db-a59d-4f89-96eb-f64b5d8bb075
25 September 2006
Cole, R.M.
8e80533f-f2f5-4b8e-bd02-d9807568728b
Sugawara, Y.
585b662a-5e52-4e03-ba20-8a9f602fcb4b
Baumberg, J.J.
78e1ea7e-8c70-404c-bf84-59aafe75cd07
Mahajan, S.
b131f40a-479e-4432-b662-19d60d4069e9
Abdelsalam, M.
19db11cd-6edc-4f00-abd0-ff307e986b35
Bartlett, P.N.
d99446db-a59d-4f89-96eb-f64b5d8bb075
Cole, R.M., Sugawara, Y., Baumberg, J.J., Mahajan, S., Abdelsalam, M. and Bartlett, P.N.
(2006)
Easily coupled whispering gallery plasmons in dielectric nanospheres embedded in gold films.
Physical Review Letters, 97 (13), .
(doi:10.1103/PhysRevLett.97.137401).
Abstract
A new self-aligned robust method for coupling to whispering gallery modes (WGMs) of submicron microspheres utilizes their periodic arrangement without relying on nanopositioned external coupling devices. The microspheres are embedded in a nanostructured gold surface supporting delocalized plasmonic crystal modes that mediate the coupling, and can be tuned by the geometry. Detailed measurements of the angle- and orientation-dependent reflectivity reveal localized plasmonic WGMs whose energies scale with sphere diameter and agree closely with Mie calculations. Coupling between these plasmonic WGMs leads to mode splitting and the formation of plasmonic minibands of a controllable bandwidth.
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Published date: 25 September 2006
Organisations:
Chemistry, Physics & Astronomy, Electronics & Computer Science, Institute for Life Sciences
Identifiers
Local EPrints ID: 57153
URI: http://eprints.soton.ac.uk/id/eprint/57153
ISSN: 0031-9007
PURE UUID: fcc5a327-d228-413b-9813-1b63990c2b33
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Date deposited: 13 Aug 2008
Last modified: 16 Mar 2024 03:53
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Contributors
Author:
R.M. Cole
Author:
Y. Sugawara
Author:
J.J. Baumberg
Author:
M. Abdelsalam
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