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Tunable optofluidic sorting and manipulation on micro-ring resonators from a statistics perspective.

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    We developed a tunable optofluidic sorting unit using thermal tuning for micro-nanoparticles. This system offers adjustable particle trapping and enables large-scale integration for advanced on-chip applications.

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    Area of Science:

    • Optofluidics
    • Nanotechnology
    • Optical trapping

    Background:

    • Micro-ring resonators and waveguides are key components in integrated photonics.
    • Optical trapping utilizes light forces to manipulate micro- and nanoparticles.
    • Optofluidic systems integrate fluidic channels with optical devices for particle manipulation.

    Purpose of the Study:

    • To propose a tunable optofluidic sorting unit for micro-nanoparticles.
    • To demonstrate localized thermal phase tuning for resonator control.
    • To enable on-chip large-scale integration of optofluidic systems.

    Main Methods:

    • Utilizing optical trapping force from evanescent waves at a micro-ring resonator.
    • Implementing localized thermal phase tuning for resonator control.
    • Analyzing Brownian motion statistics to determine trapping thresholds.

    Main Results:

    • Adjustable trapping potential well depth and trapped particle size via field build-up factor tuning.
    • Verification of critical trapping thresholds dependent on optical power, particle size, and coupling region length.
    • Demonstration of sorting, storing, and mixing operations using three resonators.

    Conclusions:

    • Localized thermal tuning allows for large-scale integration of tunable resonators, surpassing wavelength tuning limitations.
    • The proposed optofluidic units are crucial for developing advanced on-chip micro-nanoparticle manipulation systems.
    • This technology holds significant potential for applications in lab-on-a-chip devices and integrated photonics.