Manipulation and filtration of low index particles with holographic Laguerre-Gaussian optical trap arrays

Prentice, P.A. , MacDonald, M.P., Frank, T.G., Cuschieri, A., Spalding, G.C., Sibbett, W., Campbell, P.A. and Dholakia, K. (2004) Manipulation and filtration of low index particles with holographic Laguerre-Gaussian optical trap arrays. Optics Express, 12(4), pp. 593-600. (doi:10.1364/OPEX.12.000593)

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Abstract

Multiple low index particles (micrometer-sized ultrasound contrast agent), have been optically trapped using a 4×4 Laguerre-Gaussian trap array. The trapping efficiency of the Laguerre-Gaussian arrangement was measured using a Stokes’ flow approach whereby the critical relative fluid velocity required to remove particles from the optical trap was measured. The dependence of trapping efficiency on beam power was also explored and the optimum beam parameters were identified. Finally, the utility of the array as a selective filter was demonstrated by tweezing multiple low-index particles from a population exhibiting an inherent distribution in size. This procedure represents a unique remote non-contact process that may have significant applicability throughout the fields of biophysics and biotechnology.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Spalding, Professor Gabriel and Sibbett, Professor Wilson and Prentice, Dr Paul
Authors: Prentice, P.A., MacDonald, M.P., Frank, T.G., Cuschieri, A., Spalding, G.C., Sibbett, W., Campbell, P.A., and Dholakia, K.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
College of Science and Engineering > School of Physics and Astronomy
Journal Name:Optics Express
Publisher:Optical Society of America
ISSN:1094-4087
ISSN (Online):1094-4087
Published Online:24 February 2004

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