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    Area of Science:

    • Photonics
    • Biophysics
    • Microfluidics

    Background:

    • Optical trapping offers non-contact manipulation of microscopic particles.
    • Existing methods often lack integration and multi-channel capabilities.

    Purpose of the Study:

    • To develop an all-fiber integrated optical trapping platform.
    • To demonstrate multi-channel particle trapping and controlled translocation.

    Main Methods:

    • Utilized a seven-core fiber (SCF) to generate multiple Bessel-like beams.
    • Integrated SCF with single-mode fiber (SMF) to create optical fiber tweezers (OFTs).
    • Achieved non-contact trapping and manipulation of yeast cells.

    Main Results:

    • Successfully created three-dimensional optical-trap arrays on the OFT end face.
    • Demonstrated non-contact optical trapping of three yeast cells.
    • Showcased axial positional switching of a yeast cell between adjacent traps by modulating light intensity.

    Conclusions:

    • The developed OFTs provide a robust platform for multi-channel particle manipulation.
    • This technology holds potential for all-optical microfluidic chip integration.
    • OFTs are versatile tools for biomedical and life science applications.