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  • Title: Mode-based microparticle conveyor belt in air-filled hollow-core photonic crystal fiber.
    Author: Schmidt OA, Euser TG, Russell PS.
    Journal: Opt Express; 2013 Dec 02; 21(24):29383-91. PubMed ID: 24514492.
    Abstract:
    We show how microparticles can be moved over long distances and precisely positioned in a low-loss air-filled hollow-core photonic crystal fiber using a coherent superposition of two co-propagating spatial modes, balanced by a backward-propagating fundamental mode. This creates a series of trapping positions spaced by half the beat-length between the forward-propagating modes (typically a fraction of a millimeter). The system allows a trapped microparticle to be moved along the fiber by continuously tuning the relative phase between the two forward-propagating modes. This mode-based optical conveyor belt combines long-range transport of microparticles with a positional accuracy of 1 µm. The technique also has potential uses in waveguide-based optofluidic systems.
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