Three-dimensional optical trapping and manipulation of single silver nanowires

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https://pubs.acs.org/doi/10.1021/nl302100n

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https://doi.org/10.1021/nl302100n
 http://hdl.handle.net/11603/29183

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UMBC Physics Department

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Author/Creator ORCID

https://orcid.org/0000-0002-6370-8765

Date

2012-08-29

Type of Work

journal articles
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Citation of Original Publication

Yan, Zijie, Justin E. Jureller, Julian Sweet, Mason J. Guffey, Matthew Pelton, and Norbert F. Scherer. “Three-Dimensional Optical Trapping and Manipulation of Single Silver Nanowires.” Rapid-communication. ACS Publications. American Chemical Society, September 10, 2012. World. https://doi.org/10.1021/nl302100n.

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This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
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Abstract

We report the first experimental realization of all-optical trapping and manipulation of plasmonic nanowires in three dimensions. The optical beam used for trapping is the Fourier transform of a linearly polarized Bessel beam (termed FT-Bessel). The extended depth of focus of this beam enables the use of a retroreflection geometry to cancel radiation pressure in the beam propagation direction, making it possible to trap highly scattering and absorbing silver nanowires. Individual silver nanowires with lengths of several micrometers can be positioned by the trapping beam with a precision better than 100 nm and are oriented by the polarization of the trapping light with a precision of approximately 1°. Multiple nanowires can be trapped simultaneously in spatially separated maxima of the trapping field. Since trapping in the interferometric FT-Bessel potential is robust in bulk solution and near surfaces, it will enable the controlled assembly of metal nanowires into plasmonic nanostructures.