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Related Experiment Video

Updated: Mar 31, 2026

Fabrication and Testing of Microfluidic Optomechanical Oscillators
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Fabrication and Testing of Microfluidic Optomechanical Oscillators

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Localized optical manipulation in optical ring resonators.

Haotian Wang, Xiang Wu, Deyuan Shen

    Optics Express
    |October 20, 2015
    PubMed
    Summary
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    We developed a tunable optical trapping system using ring resonators to precisely control nanoparticles. This system can trap particles as small as 29 nm, offering new possibilities for nanoscale manipulation.

    Area of Science:

    • Optics
    • Nanotechnology
    • Materials Science

    Background:

    • Optical trapping systems are crucial for manipulating micro- and nanoparticles.
    • Ring resonators offer unique optical field confinement properties.
    • Controlling nanoparticle behavior at the nanoscale requires advanced trapping techniques.

    Purpose of the Study:

    • To propose and analyze a tunable optical trapping system for nanoparticles.
    • To investigate nanoparticle trapping using standing waves generated in ring resonators.
    • To compare the trapping capabilities of microring, microdisk, and slot ring resonators.

    Main Methods:

    • Numerical calculation of mode field distributions and optical forces.
    • Analysis of particle trapping stability in three types of ring resonators.

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  • Simulation of nanoparticle trapping under Brownian motion.

    • Main Results:

    • Stable trapping of 61.2 nm particles in microring resonators at 10 mW input power.
    • Tunable radial trapping achieved in microdisk resonators due to high-order radial modes.
    • Minimized trapping size of approximately 29 nm in slot ring resonators with 10 mW input power.

    Conclusions:

    • The proposed tunable optical trapping system demonstrates efficient nanoparticle manipulation.
    • Slot ring resonators offer superior trapping capabilities for smaller nanoparticles.
    • The phase difference between input beams influences the azimuthal orientation of trapped particles.