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Simultaneous trapping of low-index and high-index microparticles observed with an optical-vortex trap

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Abstract

We report the first observation of the simultaneous three-dimensional confinement of both a low-index particle and a high-index particle within a single-beam optical trap by using a strongly focused laser beam containing an optical vortex. Experimental and theoretical investigations of the trap stability are described.

© 1999 Optical Society of America

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