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Proceedings Paper

Plasmon-enhanced optical trapping of metal nanoparticles: force calculations and light-driven rotations of nanoaggregates
Author(s): O. M. Maragò; R. Saija; F. Borghese; P. Denti; P. H. Jones; E. Messina; G. Compagnini; V. Amendola; M. Meneghetti; M. A. Iatì; P. G. Gucciardi
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Paper Abstract

We investigate experimentally and theoretically plasmon-enhanced optical trapping of metal nanoparticles. We calculate the optical forces on gold and silver nanospheres through a procedure based on the Maxwell stress tensor in the transition T-matrix formalism. We compare our calculations with experimental results finding excellent agreement. We also demonstrate how light-driven rotations can be generated and detected in non-symmetric nanorods aggregates. Analyzing the motion correlations of the trapped nanostructures, we measure with high accuracy both the optical trapping parameters, and the rotation frequency induced by the radiation pressure.

Paper Details

Date Published: 28 August 2010
PDF: 8 pages
Proc. SPIE 7762, Optical Trapping and Optical Micromanipulation VII, 77622Z (28 August 2010); doi: 10.1117/12.863113
Show Author Affiliations
O. M. Maragò, Istituto per i Processi Chimico-Fisici, CNR (Italy)
R. Saija, Univ. degli Studi di Messina (Italy)
F. Borghese, Univ. degli Studi di Messina (Italy)
P. Denti, Univ. degli Studi di Messina (Italy)
P. H. Jones, Univ. College London (United Kingdom)
E. Messina, Univ. degli Studi di Catania (Italy)
G. Compagnini, Univ. degli Studi di Catania (Italy)
V. Amendola, Univ. degli Studi di Padova (Italy)
M. Meneghetti, Univ. degli Studi di Padova (Italy)
M. A. Iatì, Istituto per i Processi Chimico-Fisici, CNR (Italy)
P. G. Gucciardi, Istituto per i Processi Chimico-Fisici, CNR (Italy)


Published in SPIE Proceedings Vol. 7762:
Optical Trapping and Optical Micromanipulation VII
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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