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Proceedings Paper

Optical trapping of non-spherical plasmonic nanoparticles
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Paper Abstract

Laser manipulation with plasmonic nano-particles is a rapidly growing field with various practical applications stretching beyond physics towards biology and chemistry. For example gold nano-particles can be employed as local heat source, probes for surface enhanced Raman spectroscopy with a sensitivity going down to a single molecule or contact-less probe in scanning near-field optical microscope. A single tightly focused laser beam optical tweezers was also employed to three-dimensional trapping of gold and silver nano-particles with diameters between 20 to 250 nm. However, theoretical models assuming the spherical shape of a nano-particle predict spatial confinement only for particles with diameter lower than 100 nm. Our results indicate this discrepancy is caused by ignoring particles shape which is very important for understanding of light-matter interaction.

Paper Details

Date Published: 25 February 2014
PDF: 8 pages
Proc. SPIE 8999, Complex Light and Optical Forces VIII, 899909 (25 February 2014); doi: 10.1117/12.2041199
Show Author Affiliations
Oto Brzobohatý, Institute of Scientific Instruments of the ASCR, v.v.i. (Czech Republic)
Martin Šiler, Institute of Scientific Instruments of the ASCR, v.v.i. (Czech Republic)
Lukáš Chvátal, Institute of Scientific Instruments of the ASCR, v.v.i. (Czech Republic)
Vítězslav Karásek, Institute of Scientific Instruments of the ASCR, v.v.i. (Czech Republic)
Pavel Zemánek, Institute of Scientific Instruments of the ASCR, v.v.i. (Czech Republic)


Published in SPIE Proceedings Vol. 8999:
Complex Light and Optical Forces VIII
David L. Andrews; Enrique J. Galvez; Jesper Glückstad, Editor(s)

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