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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
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
1936-0851
6462-6470
Abb, Martina
96f778af-f51a-464e-8e73-dfa24b4132de
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
96f778af-f51a-464e-8e73-dfa24b4132de
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), 6462-6470. (doi:10.1021/nn3021579). (PMID:22708624)

Record type: Article

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: https://eprints.soton.ac.uk/id/eprint/343648
ISSN: 1936-0851
PURE UUID: dabd0c7a-604d-466c-92c0-453e04f08174
ORCID for Martina Abb: ORCID iD orcid.org/0000-0003-3996-3931
ORCID for C.H. de Groot: ORCID iD orcid.org/0000-0002-3850-7101
ORCID for Otto Muskens: ORCID iD orcid.org/0000-0003-0693-5504

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Date deposited: 09 Oct 2012 13:37
Last modified: 06 Jun 2018 12:50

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Contributors

Author: Martina Abb ORCID iD
Author: Yudong Wang
Author: Pablo Albella
Author: C.H. de Groot ORCID iD
Author: Javier Aizpurua
Author: Otto Muskens ORCID iD

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