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Applied Physics Letters / Volume 100 / Issue 2 / PHOTONICS AND OPTOELECTRONICS

Appl. Phys. Lett. 100, 021102 (2012); http://dx.doi.org/10.1063/1.3675550 (3 pages)

Efficient optical trapping using small arrays of plasmonic nanoblock pairs

Yoshito Tanaka and Keiji Sasaki

Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0020, Japan

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(Received 11 November 2011; accepted 12 December 2011; published online 9 January 2012)

We report that a small two-dimensional array of gold nanoblock pairs separated by a nanometric gap significantly improves the performance of optical trapping compared to a single nanoblock pair. The array of 4 × 4 pairs suppresses the Brownian motion of a trapped 1 μm diameter particle by a factor of six compared to the single pair. In addition, the array enables particle trapping for a longer period of time. These results are essential for biological applications where intense optical irradiation is a concern.

© 2012 American Institute of Physics

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KEYWORDS and PACS

Keywords

Brownian motion, gold, nanophotonics, optical arrays, plasmonics, radiation pressure

PACS

  • 42.50.Wk

    Mechanical effects of light on material media, microstructures and particles

  • 42.79.-e

    Optical elements, devices, and systems

  • 05.40.Jc

    Brownian motion

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3675550

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    P. C. Chaumet, A. Rahmani, and M. Nieto-Vesperinas, Phys. Rev. Lett. 88, 123601 (2002).

    L. Novotny, R. X. Bian, and X. S. Xie, Phys. Rev. Lett. 79(4), 645 (1997).

    G. Baffou, R. Quidant, and C. Girard, Phys. Rev. B 82, 165424 (2010).


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