alexa Planar optical tweezers using tapered-waveguide junctions.


Journal of Biosensors & Bioelectronics

Author(s): Cai H, Poon AW

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Abstract We demonstrate planar optical tweezers using the evanescent field of a silicon nitride tapered-waveguide junction between a singlemode waveguide and a multimode waveguide. Our experiments show that the junction embedded in a fluidic channel holds up to one and two polystyrene particles of sizes of 2.2 μm and 1 μm, respectively. The trapped particles are successively substituted by the incoming particles. Our experiments and numerical modeling reveal that the junction particle trapping depends on particle size and number.
This article was published in Opt Lett and referenced in Journal of Biosensors & Bioelectronics

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