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Phys Rev E Stat Nonlin Soft Matter Phys. 2011 May;83(5 Pt 1):051406. Epub 2011 May 31.

Three-dimensional arrays of submicron particles generated by a four-beam optical lattice.

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1
FOCUS Center, Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.

Abstract

Using an optical lattice formed by four laser beams, we obtain three-dimensional light-induced crystals of 490-nm-diameter polystyrene spheres in solution. The setup yields face-centered orthorhombic optical crystals of a packing density of about 40%. An alignment procedure is developed in which the crystals are first prepared near a sample wall, and then in the bulk of the sample. A series of tests is performed that demonstrate particle trapping in all three dimensions. For one case, the trapping force is measured, and good agreement with a simple theoretical model is found. Possible applications are discussed.

PMID:
21728533
DOI:
10.1103/PhysRevE.83.051406
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