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Proceedings Article

Controlled formation of optically bound matter in evanescent fields

[+] Author Affiliations
Michael D. Summers, Richard D. Dear, Grant A. D. Ritchie

Univ. of Oxford (United Kingdom)

Jonathan M. Taylor

Durham Univ. (United Kingdom)

Proc. SPIE 7762, Optical Trapping and Optical Micromanipulation VII, 776213 (August 27, 2010); doi:10.1117/12.860685
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From Conference Volume 7762

  • Optical Trapping and Optical Micromanipulation VII
  • Kishan Dholakia; Gabriel C. Spalding
  • San Diego, California | August 01, 2010

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.

© (2010) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Michael D. Summers ; Richard D. Dear ; Jonathan M. Taylor and Grant A. D. Ritchie
"Controlled formation of optically bound matter in evanescent fields", Proc. SPIE 7762, Optical Trapping and Optical Micromanipulation VII, 776213 (August 27, 2010); doi:10.1117/12.860685; http://dx.doi.org/10.1117/12.860685


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