Friday, June 14, 2013

All-optical particle trap using orthogonally intersecting beams

K. D. Leake, A. R. Hawkins, and H. Schmidt

We analyze the properties of a dual-beam trap of orthogonally intersecting beams in the geometrical optics regime. We derive analytical expressions for the trapping location and stability criteria for trapping a microparticle with uncollimated Gaussian beams. An upper limit for the beam waist is found. Optical forces and particle trajectories are calculated numerically for the realistic case of a microparticle in intersecting liquid-core waveguides.
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