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

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Errata

J. J. Xiao, H. H. Zheng, Y. X. Sun, and Y. Yao, "Bipolar optical forces on dielectric and metallic nanoparticles by evanescent wave: erratum," Opt. Lett. 35, 1853-1853 (2010)
https://www.osapublishing.org/ol/abstract.cfm?uri=ol-35-11-1853

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