Journal
OPTICS COMMUNICATIONS
Volume 201, Issue 1-3, Pages 21-28Publisher
ELSEVIER
DOI: 10.1016/S0030-4018(01)01652-2
Keywords
optical trapping; optical manipulation; Laguerre-Gaussian beams; interference patterns; micro-particle rotation
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Optically trapped objects are rotated controllably in the interference pattern between a Laguerre-Gaussian (LG) beam and a Gaussian beam. In this work the interference pattern is analysed and its properties as it propagates are modelled, showing the important role played by the Guoy-phase of the two interfering beams. An analysis of producing controlled rotation of the interference pattern using a glass plate is presented demonstrating the ease with which the rotation can be controlled. (C) 2002 Elsevier Science B.V. All rights reserved.
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