Interference, coupling, and nonlinear control of high-order modes in single asymmetric nanoantennas
Interference, coupling, and nonlinear control of high-order modes in single asymmetric nanoantennas
We investigate theoretically and experimentally the structure of plasmonic modes in individual asymmetric dimer antennas. Plasmonic near-field coupling of high-order modes results in hybridization of bright and dark modes of the individual nanorods, leading to an anticrossing of the coupled resonances. For two bright modes, hybridization results in a capacitive red shift and super-radiant broadening. We show that the properties of asymmetric dimers can be used for nonlinear control of spectral modes and demonstrate such a nonlinear effect by measuring the modulation of a hybrid asymmetric dimer;ITO antenna. With use of full electrodynamical calculations, we find that the properties of the near-field nonlinear responses are distinctly different from the far-field, which opens up new routes for nonlinear control of plasmonic nanosystems.
plasmon, nanoantenna, asymmetric dimer, fano resonance, nonlinear response, figure of merit
6462-6470
Abb, Martina
d1aa3add-7761-4c4f-8a3d-7da3084deb33
Wang, Yudong
c48bcc7c-4cb4-468c-af4e-d1e601222009
Albella, Pablo
9024265d-411e-4794-894e-499d88cda55c
de Groot, C.H.
92cd2e02-fcc4-43da-8816-c86f966be90c
Aizpurua, Javier
17705349-38e3-4089-adba-547d02449095
Muskens, Otto
2284101a-f9ef-4d79-8951-a6cda5bfc7f9
24 July 2012
Abb, Martina
d1aa3add-7761-4c4f-8a3d-7da3084deb33
Wang, Yudong
c48bcc7c-4cb4-468c-af4e-d1e601222009
Albella, Pablo
9024265d-411e-4794-894e-499d88cda55c
de Groot, C.H.
92cd2e02-fcc4-43da-8816-c86f966be90c
Aizpurua, Javier
17705349-38e3-4089-adba-547d02449095
Muskens, Otto
2284101a-f9ef-4d79-8951-a6cda5bfc7f9
Abb, Martina, Wang, Yudong, Albella, Pablo, de Groot, C.H., Aizpurua, Javier and Muskens, Otto
(2012)
Interference, coupling, and nonlinear control of high-order modes in single asymmetric nanoantennas.
ACS Nano, 6 (7), .
(doi:10.1021/nn3021579).
(PMID:22708624)
Abstract
We investigate theoretically and experimentally the structure of plasmonic modes in individual asymmetric dimer antennas. Plasmonic near-field coupling of high-order modes results in hybridization of bright and dark modes of the individual nanorods, leading to an anticrossing of the coupled resonances. For two bright modes, hybridization results in a capacitive red shift and super-radiant broadening. We show that the properties of asymmetric dimers can be used for nonlinear control of spectral modes and demonstrate such a nonlinear effect by measuring the modulation of a hybrid asymmetric dimer;ITO antenna. With use of full electrodynamical calculations, we find that the properties of the near-field nonlinear responses are distinctly different from the far-field, which opens up new routes for nonlinear control of plasmonic nanosystems.
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e-pub ahead of print date: 25 June 2012
Published date: 24 July 2012
Keywords:
plasmon, nanoantenna, asymmetric dimer, fano resonance, nonlinear response, figure of merit
Organisations:
Nanoelectronics and Nanotechnology, Quantum, Light & Matter Group
Identifiers
Local EPrints ID: 343648
URI: http://eprints.soton.ac.uk/id/eprint/343648
ISSN: 1936-0851
PURE UUID: dabd0c7a-604d-466c-92c0-453e04f08174
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Date deposited: 09 Oct 2012 13:37
Last modified: 15 Mar 2024 03:34
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Contributors
Author:
Martina Abb
Author:
Yudong Wang
Author:
Pablo Albella
Author:
Javier Aizpurua
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