title: Planar optical tweezers using tapered-waveguide junctions.
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.
authors: Photonic Device Laboratory, Department of Electronic and Computer Engineering The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong SAR, China. eeawpoon@ust.hk
authors: Hong
authors: H
authors: Cai
authors: Andrew W
authors: AW
authors: Poon