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Proceedings Paper

Controlled formation of optically bound matter in evanescent fields
Author(s): Michael D. Summers; Richard D. Dear; Jonathan M. Taylor; Grant A. D. Ritchie
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Paper Abstract

In this paper, we detail two techniques for standing wave evanescent field optical trapping utilizing total internal reflection at a prism-water interface. Firstly, we describe an actively-locked cavity enhancement technique that generates circulating powers in excess of 10 W over an area of 150 μm x 75 μm on the prism surface using a 400 mW source, as well as providing control over the shape of the underlying transverse cavity mode. Secondly, we have combined an inverted optical tweezers with a counter-propagating evanescent wave trapping experiment, providing a useful platform for exploring light scattering interactions between small ensembles of particles. The resulting structures are compared to our theoretical model based upon Generalised Lorentz-Mie Theory.

Paper Details

Date Published: 27 August 2010
PDF: 8 pages
Proc. SPIE 7762, Optical Trapping and Optical Micromanipulation VII, 776213 (27 August 2010); doi: 10.1117/12.860685
Show Author Affiliations
Michael D. Summers, Univ. of Oxford (United Kingdom)
Richard D. Dear, Univ. of Oxford (United Kingdom)
Jonathan M. Taylor, Durham Univ. (United Kingdom)
Grant A. D. Ritchie, Univ. of Oxford (United Kingdom)

Published in SPIE Proceedings Vol. 7762:
Optical Trapping and Optical Micromanipulation VII
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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