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Controlled simultaneous rotation of multiple optically trapped particles |
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| Authors: | L Paterson M P Macdonald J Arlt W Dultz H Schmitzer W Sibbett |
| Affiliation: | 1. School of Physics and Astronomy, St Andrews University , St Andrews, Fife, KY16 9SS, Scotland, UK;2. COSMIC, Department of Physics and Astronomy , The University of Edinburgh , The King's Buildings, Edinburgh, EH9 3JZ, Scotland, UK;3. Johann Wolfgang Goethe-Universitat, Frankfurt am Main, Phyikalisches Institut (Fb 13) , Robert Mayer Strasse 2-4, D-60054, Frankfurt am Main, Germany |
| Abstract: | Abstract We present a method for the controlled alignment or rotation of birefringent particles trapped in multiple optical trap sites of an interference pattern between two Laguerre—Gaussian laser modes. Controlled spin or alignment of the particles within each individual trap site is achieved independently of the lateral or rotational motion of the interference pattern as a whole. This technique may lead to driving arrays of micro-machines and micro-fluidic studies and can be used in combination with dynamically generated trapping arrays for uniformly distributed stirring throughout microscopic volumes of fluid. |
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