Abstract
We demonstrate three-dimensional trapping of micrometer-diameter silica particles, partially coated with silver, within conventional optical tweezers. Although metallic particles are usually repelled from the beam focus by the scattering force, we show that transparent spheres partially coated with silver can be trapped with efficiencies comparable with dielectric particles. The trapping characteristics of these particles are examined as a function of metallic coverage, and the application of these particles to surface-enhanced resonance Raman scattering is investigated.
© 2004 Optical Society of America
Full Article | PDF ArticleMore Like This
Pamela Jordan, Jon Cooper, Graeme McNay, Frances T. Docherty, Duncan Graham, W. Ewen Smith, Gavin Sinclair, and Miles J. Padgett
Opt. Express 13(11) 4148-4153 (2005)
Karen Volke-Sepúlveda, Sabino Chávez-Cerda, Veneranda Garcés-Chávez, and Kishan Dholakia
J. Opt. Soc. Am. B 21(10) 1749-1757 (2004)
Carsten Rockstuhl and Hans Peter Herzig
Opt. Lett. 29(18) 2181-2183 (2004)