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Stuttgart 2012 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 29: Photonik 2

Q 29.7: Talk

Tuesday, March 13, 2012, 15:30–15:45, V38.01

All-Optical Control of a Single Plasmonic Nanoantenna-ITO hybrid — •Martina Abb1, Pablo Albella2, Nicolas Large2, Javier Aizpurua2, and Otto Lambert Muskens11SEPnet and the Department of Physics and Astronomy, University of Southampton, United Kingdom — 2Donostia International Physics Center, DIPC, and Centro de Fisica de Materiales CSIC-UPV/EHU, Donostia-San Sebastian, Spain

Nanoscale plasmonic components such as nanoantennas are of enormous interest for their capabilities of locally enhancing electromagnetic fields and controlling emission. Active control of such components will enable a new generation of tunable devices.

We recently introduced a new concept of antenna switches relying on photoconductive load-ing of the gap between the two antenna arms [1]. As a potentially ultrafast implementation of that concept, we demonstrate experimentally picosecond all-optical control of a plasmonic nanoantenna embedded in indium tin oxide [2]. We observe a hybrid nonlinear response which is caused by a picosecond energy transfer mechanism involving hot electron injection from gold into ITO. Hybrid plasmonic components are of great interest for active control of optical fields and integration of photonic and electronic functionalities.

[1] N. Large, M. Abb, J. Aizpurua and O. L. Muskens, Nano Lett. 10, 1741 (2010).

[2] M. Abb, P. Albella, J. Aizpurua and O. L. Muskens, Nano Lett. 11, 2457 (2011).

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