Particle trapping with higher order doughnut beams

H. He; N. R. Heckenberg; H. Rubinsztein-Dunlop

European Quantum Electronics Conference
Technical Digest Series (Optica Publishing Group, 1994),
paper QWA2

Particle trapping with higher order doughnut beams

H. He, N. R. Heckenberg, and H. Rubinsztein-Dunlop

European Quantum Electronics Conference 1994

Amsterdam Netherlands
28 August–2 September 1994
ISBN:

From the session
Clusters, Light Fields (QWA)

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H. He, N. R. Heckenberg, and H. Rubinsztein-Dunlop, "Particle trapping with higher order doughnut beams," in European Quantum Electronics Conference, Technical Digest Series (Optica Publishing Group, 1994), paper QWA2.

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Abstract

Transparent particles with refractive index higher than their surroundings can be trapped in the middle of a highly focussed Gaussian beam.¹ Reflective and absorptive particles cannot be trapped in such a beam as strong repulsive forces act but they can be trapped in the dark central spot of a doughnut beam,² greatly extending the usefulness of the "optical tweezers" concept.

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