Mapping gigahertz vibrations in a plasmonic–phononic crystal
Mapping gigahertz vibrations in a plasmonic–phononic crystal
We image the gigahertz vibrational modes of a plasmonic–phononic crystal at sub-micron resolution by means of an ultrafast optical technique, using a triangular array of spherical gold nanovoids as a sample. Light is strongly coupled to the plasmonic modes, which interact with the gigahertz phonons by a process akin to surface-enhanced stimulated Brillouin scattering. A marked enhancement in the observed optical reflectivity change at the centre of a void on phononic resonance is likely to be caused by this mechanism. By comparison with numerical simulations of the vibrational field, we identify resonant breathing deformations of the voids and elucidate the corresponding mode shapes. We thus establish scanned optomechanical probing of periodic plasmonic–phononic structures as a new means of investigating their coupled excitations on the nanoscale.
23013
Kelf, Timothy A.
97076129-a896-4fed-8646-0b6c54272a57
Hoshii, Wataru
a1bcdacd-b029-4dd1-a0c2-875b45292a51
Otsuka, Paul H.
f24ec3af-e408-46e1-a17a-89b29f9a2401
Sakuma, Hirotaka
2f9f4e14-80bb-40ce-8118-fb01693b627b
Veres, Istvan A.
163c5371-9e99-404a-b323-e923b67f00b9
Cole, Robin M.
29fa4536-7e68-43ee-acfa-673f0768af9c
Mahajan, Sumeet
b131f40a-479e-4432-b662-19d60d4069e9
Baumberg, Jeremy
44ce7dca-7035-4043-9a92-3e8a69a31f72
Tomoda, Motonobu
87f46fd8-a4a7-4b49-bc5f-8a6d3e5b6af8
Matsuda, Osamu
33a6004b-8262-404c-80db-4d4870f0af0c
Wright, Oliver B.
3f9ed3be-e416-4fb1-bf05-43b87257058d
February 2013
Kelf, Timothy A.
97076129-a896-4fed-8646-0b6c54272a57
Hoshii, Wataru
a1bcdacd-b029-4dd1-a0c2-875b45292a51
Otsuka, Paul H.
f24ec3af-e408-46e1-a17a-89b29f9a2401
Sakuma, Hirotaka
2f9f4e14-80bb-40ce-8118-fb01693b627b
Veres, Istvan A.
163c5371-9e99-404a-b323-e923b67f00b9
Cole, Robin M.
29fa4536-7e68-43ee-acfa-673f0768af9c
Mahajan, Sumeet
b131f40a-479e-4432-b662-19d60d4069e9
Baumberg, Jeremy
44ce7dca-7035-4043-9a92-3e8a69a31f72
Tomoda, Motonobu
87f46fd8-a4a7-4b49-bc5f-8a6d3e5b6af8
Matsuda, Osamu
33a6004b-8262-404c-80db-4d4870f0af0c
Wright, Oliver B.
3f9ed3be-e416-4fb1-bf05-43b87257058d
Kelf, Timothy A., Hoshii, Wataru, Otsuka, Paul H., Sakuma, Hirotaka, Veres, Istvan A., Cole, Robin M., Mahajan, Sumeet, Baumberg, Jeremy, Tomoda, Motonobu, Matsuda, Osamu and Wright, Oliver B.
(2013)
Mapping gigahertz vibrations in a plasmonic–phononic crystal.
New Journal of Physics, 15 (2), .
(doi:10.1088/1367-2630/15/2/023013).
Abstract
We image the gigahertz vibrational modes of a plasmonic–phononic crystal at sub-micron resolution by means of an ultrafast optical technique, using a triangular array of spherical gold nanovoids as a sample. Light is strongly coupled to the plasmonic modes, which interact with the gigahertz phonons by a process akin to surface-enhanced stimulated Brillouin scattering. A marked enhancement in the observed optical reflectivity change at the centre of a void on phononic resonance is likely to be caused by this mechanism. By comparison with numerical simulations of the vibrational field, we identify resonant breathing deformations of the voids and elucidate the corresponding mode shapes. We thus establish scanned optomechanical probing of periodic plasmonic–phononic structures as a new means of investigating their coupled excitations on the nanoscale.
This record has no associated files available for download.
More information
Published date: February 2013
Organisations:
Institute for Life Sciences, Molecular Diagnostics & Thereputics
Identifiers
Local EPrints ID: 350240
URI: http://eprints.soton.ac.uk/id/eprint/350240
PURE UUID: 88468e2c-ca1f-43f6-892c-2e9d2d503b28
Catalogue record
Date deposited: 20 Mar 2013 16:44
Last modified: 15 Mar 2024 03:28
Export record
Altmetrics
Contributors
Author:
Timothy A. Kelf
Author:
Wataru Hoshii
Author:
Paul H. Otsuka
Author:
Hirotaka Sakuma
Author:
Istvan A. Veres
Author:
Robin M. Cole
Author:
Jeremy Baumberg
Author:
Motonobu Tomoda
Author:
Osamu Matsuda
Author:
Oliver B. Wright
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics