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Easily coupled whispering gallery plasmons in dielectric nanospheres embedded in gold films

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.
0031-9007
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
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), 137401-[4pp]. (doi:10.1103/PhysRevLett.97.137401).

Record type: Article

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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More information

Published date: 25 September 2006
Organisations: Chemistry, Physics & Astronomy, Electronics & Computer Science, Institute for Life Sciences

Identifiers

Local EPrints ID: 57153
URI: https://eprints.soton.ac.uk/id/eprint/57153
ISSN: 0031-9007
PURE UUID: fcc5a327-d228-413b-9813-1b63990c2b33
ORCID for S. Mahajan: ORCID iD orcid.org/0000-0001-8923-6666
ORCID for P.N. Bartlett: ORCID iD orcid.org/0000-0002-7300-6900

Catalogue record

Date deposited: 13 Aug 2008
Last modified: 14 Mar 2019 01:53

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Contributors

Author: R.M. Cole
Author: Y. Sugawara
Author: J.J. Baumberg
Author: S. Mahajan ORCID iD
Author: M. Abdelsalam
Author: P.N. Bartlett ORCID iD

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