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All-optical control of a single plasmonic nanoantenna–ITO hybrid

All-optical control of a single plasmonic nanoantenna–ITO hybrid
All-optical control of a single plasmonic nanoantenna–ITO hybrid
We demonstrate experimentally picosecond all-optical control of a single plasmonic nanoantenna embedded in indium tin oxide (ITO). We identify a picosecond response of the antenna–ITO hybrid system, which is distinctly different from transient bleaching observed for gold antennas on a nonconducting SiO2 substrate. Our experimental results can be explained by the large free-carrier nonlinearity of ITO, which is enhanced by plasmon-induced hot-electron injection from the gold nanoantenna into the conductive oxide. The combination of tunable antenna–ITO hybrids with nanoscale plasmonic energy transfer mechanisms, as demonstrated here, opens a path for new ultrafast devices to produce nanoplasmonic switching and control.

active, plasmonic, nanoantenna, hybrid nanostructures, nanophotonics
1530-6984
2457-2463
Abb, Martina
d1aa3add-7761-4c4f-8a3d-7da3084deb33
Albella, Pablo
9024265d-411e-4794-894e-499d88cda55c
Aizpurua, Javier
17705349-38e3-4089-adba-547d02449095
Muskens, Otto L.
2284101a-f9ef-4d79-8951-a6cda5bfc7f9
Abb, Martina
d1aa3add-7761-4c4f-8a3d-7da3084deb33
Albella, Pablo
9024265d-411e-4794-894e-499d88cda55c
Aizpurua, Javier
17705349-38e3-4089-adba-547d02449095
Muskens, Otto L.
2284101a-f9ef-4d79-8951-a6cda5bfc7f9

Abb, Martina, Albella, Pablo, Aizpurua, Javier and Muskens, Otto L. (2011) All-optical control of a single plasmonic nanoantenna–ITO hybrid. Nano Letters, 11 (6), 2457-2463. (doi:10.1021/nl200901w).

Record type: Article

Abstract

We demonstrate experimentally picosecond all-optical control of a single plasmonic nanoantenna embedded in indium tin oxide (ITO). We identify a picosecond response of the antenna–ITO hybrid system, which is distinctly different from transient bleaching observed for gold antennas on a nonconducting SiO2 substrate. Our experimental results can be explained by the large free-carrier nonlinearity of ITO, which is enhanced by plasmon-induced hot-electron injection from the gold nanoantenna into the conductive oxide. The combination of tunable antenna–ITO hybrids with nanoscale plasmonic energy transfer mechanisms, as demonstrated here, opens a path for new ultrafast devices to produce nanoplasmonic switching and control.

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Published date: May 2011
Keywords: active, plasmonic, nanoantenna, hybrid nanostructures, nanophotonics

Identifiers

Local EPrints ID: 190355
URI: https://eprints.soton.ac.uk/id/eprint/190355
ISSN: 1530-6984
PURE UUID: 191fc3fe-08c9-40f1-9625-4870a3215cbe
ORCID for Otto L. Muskens: ORCID iD orcid.org/0000-0003-0693-5504

Catalogue record

Date deposited: 13 Jun 2011 09:21
Last modified: 12 Nov 2019 01:42

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