Near-field optical micromanipulation with cavity enhanced evanescent waves

We show that the forces associated with near-field optical micromanipulation can be greatly increased through the use of cavity enhanced evanescent waves. This approach utilizes a resonant dielectric waveguide structure and a prism coupler to produce Fabry-Pérot-like cavity modes at a dielectric-flu...

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Bibliographic Details
Published in:Applied physics letters 2006-05, Vol.88 (22)
Main Authors: Reece, Peter J., Garcés-Chávez, Veneranda, Dholakia, Kishan
Format: Article
Language:English
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Summary:We show that the forces associated with near-field optical micromanipulation can be greatly increased through the use of cavity enhanced evanescent waves. This approach utilizes a resonant dielectric waveguide structure and a prism coupler to produce Fabry-Pérot-like cavity modes at a dielectric-fluid interface. Fabricated structures show a ten times enhancement in the optical interaction and optical force for micrometer-sized colloids. In addition, stable accumulation and ordering of large scale arrays of colloids are demonstrated using two counter-propagating cavity enhanced evanescent waves.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2208272