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Proceedings Paper

Complete three-dimensional optical characterization of single gold nanorods
Author(s): Frank Wackenhut; Antonio Virgilio Failla; Tina Züchner; Alfred J. Meixner
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Paper Abstract

We present a powerful technique to fully characterize individual gold nanorods by using confocal microscopy in combination with higher order laser modes. We obtain topological information far beyond the optical resolution limit, although the used method is diffraction limited. We perform, for the first time, the imaging of gold nanorods by recording simultaneously their scattering and luminescence signal. In the future, this might permit to extent the results achieved already in [1] to a 3D system. Moreover, the scattering pattern is strongly dependent on the phase relation between the light scattered and reflected at the sample interface, while the luminescence pattern does not depend on this phase relation. By exploiting an index matched sample geometry, we were able to omit the phase relation and therefore detect the pure scattering signal and qualitatively compare it with the luminescence one. Furthermore, as previously shown [2, 3], our technique is capable to track the rotation of single noble metal nanorods. We show that measuring the rotation rate of gold nanorods might be useful to estimate the local viscosity of the surrounding medium.

Paper Details

Date Published: 20 September 2011
PDF: 8 pages
Proc. SPIE 8096, Plasmonics: Metallic Nanostructures and Their Optical Properties IX, 80962V (20 September 2011); doi: 10.1117/12.893467
Show Author Affiliations
Frank Wackenhut, Eberhard Karls Univ. Tübingen (Germany)
Antonio Virgilio Failla, Eberhard Karls Univ. Tübingen (Germany)
Max-Planck-Institut für Entwicklungsbiologie (Germany)
Tina Züchner, Eberhard Karls Univ. Tübingen (Germany)
Alfred J. Meixner, Eberhard Karls Univ. Tübingen (Germany)

Published in SPIE Proceedings Vol. 8096:
Plasmonics: Metallic Nanostructures and Their Optical Properties IX
Mark I. Stockman, Editor(s)

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