We numerically investigate the optical forces exerted by an incident light beam on Rayleigh metallic particles over a dielectric substrate. In analogy with atom manipulation, we identify two different trapping regimes depending on whether the illumination is performed within the plasmon band or out of it. By adjusting the incident wavelength, the particles can be selectively guided, or immobilized, at the substrate interface.
© 2006 Optical Society of America
Original Manuscript: March 14, 2006
Manuscript Accepted: April 17, 2006
Vol. 1, Iss. 8 Virtual Journal for Biomedical Optics
Anna S. Zelenina, Romain Quidant, Gonçal Badenes, and Manuel Nieto-Vesperinas, "Tunable optical sorting and manipulation of nanoparticles via plasmon excitation," Opt. Lett. 31, 2054-2056 (2006)