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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 35, Iss. 7 — Apr. 1, 2010
  • pp: 962–964

Bipolar optical forces on dielectric and metallic nanoparticles by evanescent wave

J. J. Xiao, H. H. Zheng, Y. X. Sun, and Y. Yao  »View Author Affiliations


Optics Letters, Vol. 35, Issue 7, pp. 962-964 (2010)
http://dx.doi.org/10.1364/OL.35.000962


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Abstract

We numerically show that both repulsive and attractive (bipolar) optical forces can be exerted on a dielectric or metallic cylindrical nanoparticle by a totally internal refracted wave. This requires that the particles possesses either a whispering gallery (WG) resonance or a localized surface plasmon (LSP) resonance. We further explore the force spectrum that is governed by competition between the separation-dependent resonant Q factor and the coupling strength of the nanoparticle to the evanescent wave. In spite of a much smaller Q of the LSP as compare to the WG resonances, the metallic particle gains much stronger trapping force.

© 2010 Optical Society of America

OCIS Codes
(140.7010) Lasers and laser optics : Laser trapping
(220.4880) Optical design and fabrication : Optomechanics

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: October 28, 2009
Revised Manuscript: February 8, 2010
Manuscript Accepted: February 16, 2010
Published: March 23, 2010

Citation
J. J. Xiao, H. H. Zheng, Y. X. Sun, and Y. Yao, "Bipolar optical forces on dielectric and metallic nanoparticles by evanescent wave," Opt. Lett. 35, 962-964 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-7-962


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