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- Title
Controlled rotation of optically trapped microscopic particles.
- Authors
Paterson, L; MacDonald, M P; Arlt, J; Sibbett, W; Bryant, P E; Dholakia, K
- Abstract
We demonstrate controlled rotation of optically trapped objects in a spiral interference pattern. This pattern is generated by interfering an annular shaped laser beam with a reference beam. Objects are trapped in the spiral arms of the pattern. Changing the optical path length causes this pattern, and thus the trapped objects, to rotate. Structures of silica microspheres, microscopic glass rods, and chromosomes are set into rotation at rates in excess of 5 hertz. This technique does not depend on intrinsic properties of the trapped particle and thus offers important applications in optical and biological micromachines.
- Publication
Science (New York, N.Y.), 2001, Vol 292, Issue 5518, p912
- ISSN
0036-8075
- Publication type
Journal Article
- DOI
10.1126/science.1058591