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Understanding plasmons in nanoscale voids

Understanding plasmons in nanoscale voids
Understanding plasmons in nanoscale voids
Metallic nanoscale voids (“anti-nanoparticles”) are shown to possess radically different plasmon modes to metal nanoparticles. Comparing new boundary element calculations for the first time with experiment clearly and intuitively identifies plasmon wavefunctions in spherical voids according to their atomic-like symmetries. As the spherical voids are progressively truncated, the degenerate radial modes split in energy, with intense coupling to incident light at specific optimal angles. In contrast to nanoparticles, voids embedded in metal films possess additional rim plasmon modes that selectively couple with void plasmons to produce bonding and antibonding hybridized states with significant field enhancements. These modes, which are verified in experiment, are crucial for the effective use of plasmons in antenna applications such as reproducible surface enhanced Raman scattering
1530-6984
2094-2100
Cole, Robin M.
29fa4536-7e68-43ee-acfa-673f0768af9c
Baumberg, Jeremy J.
51423b5f-bdb8-4851-8d50-472253ceb12c
Garcia de Abajo, F. J.
28e1e288-3488-4783-b9f8-e06d3ec2d49c
Mahajan, Sumeet
b131f40a-479e-4432-b662-19d60d4069e9
Abdelsalam, Mamdouh
d1cbddcb-9f5c-46d5-b774-1bbaee26e115
Bartlett, Philip N.
d99446db-a59d-4f89-96eb-f64b5d8bb075
Cole, Robin M.
29fa4536-7e68-43ee-acfa-673f0768af9c
Baumberg, Jeremy J.
51423b5f-bdb8-4851-8d50-472253ceb12c
Garcia de Abajo, F. J.
28e1e288-3488-4783-b9f8-e06d3ec2d49c
Mahajan, Sumeet
b131f40a-479e-4432-b662-19d60d4069e9
Abdelsalam, Mamdouh
d1cbddcb-9f5c-46d5-b774-1bbaee26e115
Bartlett, Philip N.
d99446db-a59d-4f89-96eb-f64b5d8bb075

Cole, Robin M., Baumberg, Jeremy J., Garcia de Abajo, F. J., Mahajan, Sumeet, Abdelsalam, Mamdouh and Bartlett, Philip N. (2007) Understanding plasmons in nanoscale voids. Nano Letters, 7 (7), 2094-2100. (doi:10.1021/nl0710506).

Record type: Article

Abstract

Metallic nanoscale voids (“anti-nanoparticles”) are shown to possess radically different plasmon modes to metal nanoparticles. Comparing new boundary element calculations for the first time with experiment clearly and intuitively identifies plasmon wavefunctions in spherical voids according to their atomic-like symmetries. As the spherical voids are progressively truncated, the degenerate radial modes split in energy, with intense coupling to incident light at specific optimal angles. In contrast to nanoparticles, voids embedded in metal films possess additional rim plasmon modes that selectively couple with void plasmons to produce bonding and antibonding hybridized states with significant field enhancements. These modes, which are verified in experiment, are crucial for the effective use of plasmons in antenna applications such as reproducible surface enhanced Raman scattering

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More information

Published date: 2007
Organisations: Chemistry, Institute for Life Sciences

Identifiers

Local EPrints ID: 145845
URI: https://eprints.soton.ac.uk/id/eprint/145845
ISSN: 1530-6984
PURE UUID: e864f3e5-0a60-4883-8ff6-9e3664485263
ORCID for Sumeet Mahajan: ORCID iD orcid.org/0000-0001-8923-6666
ORCID for Philip N. Bartlett: ORCID iD orcid.org/0000-0002-7300-6900

Catalogue record

Date deposited: 09 Jun 2010 11:20
Last modified: 17 Jul 2019 01:17

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