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Proceedings Paper

Normal-light streak effect in optically trapped hollow microspheres
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Paper Abstract

We report on the observation of a normal streak effect on hollow micron sized spheres when illuminated by a focused Gaussian beam in a conventional optical tweezers setup. The hollow microspheres suspended in water can be optically trapped at the center of the illuminating beam. When the microsphere is illuminated off center, an emerging beam approximately perpendicular respect to the incoming beam is generated. This effect due to total internal reflections has been observed in microspheres with different external diameters, ranging from 5-20 microns. The generated normal beam is used to either pull or push other particles or objects around the microsphere or to remove particles stuck to the sphere due to radiation pressure.

Paper Details

Date Published: 18 October 2004
PDF: 8 pages
Proc. SPIE 5514, Optical Trapping and Optical Micromanipulation, (18 October 2004); doi: 10.1117/12.556997
Show Author Affiliations
Ibis Ricardez-Vargas, Instituto Nacional de Astrofísica, Optica y Electronica (Mexico)
David Iturbe-Castillo, Instituto Nacional de Astrofísica, Optica y Electronica (Mexico)
Ruben Ramos-Garcia, Instituto Nacional de Astrofísica, Optica y Electronica (Mexico)
Karen P. Volke-Sepulveda, Univ. Nacional Autonoma de Mexico (Mexico)
Victor Ruiz-Cortes, Ctr. de Investigacion Cientifica y de Educacion Superior de Ensenada (Mexico)

Published in SPIE Proceedings Vol. 5514:
Optical Trapping and Optical Micromanipulation
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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