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Related Experiment Video

Updated: Jul 31, 2025

Fabrication of Silica Ultra High Quality Factor Microresonators
07:51

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Published on: July 2, 2012

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Unidirectional light emission in a deformed circular-side triangular microresonator.

Wei Wang, You-Ling Chen, Zheng-Zheng Shen

    Optics Express
    |May 9, 2023
    PubMed
    Summary
    This summary is machine-generated.

    We developed a novel microresonator for unidirectional light emission. This device enables highly sensitive nanoparticle detection, paving the way for portable sensing applications.

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    Area of Science:

    • Optoelectronics
    • Nanophotonics
    • Integrated Optics

    Background:

    • Microresonators are crucial for integrated photonic devices.
    • Controlling light emission directionality is key for advanced applications.
    • Nanoparticle detection requires sensitive and portable methods.

    Purpose of the Study:

    • To propose and fabricate a novel waveguide-connected deformed circular-side triangular microresonator.
    • To demonstrate room-temperature unidirectional light emission.
    • To explore applications in nanoparticle detection.

    Main Methods:

    • Fabrication of a deformed circular-side triangular microresonator.
    • Experimental demonstration of far-field light emission.
    • Characterization of lasing properties and emission pattern sensitivity.

    Main Results:

    • Unidirectional light emission achieved at room temperature with a 38° divergence angle.
    • Single-mode lasing at 1545.4 nm with a low injection current of 12 mA.
    • Significant changes in emission patterns upon nanoparticle binding (down to several nanometers).

    Conclusions:

    • The proposed microresonator enables efficient unidirectional light emission.
    • The device shows promise for electrically pumped, cost-effective, portable, and highly sensitive nanoparticle detection.
    • This technology could advance real-time environmental and biomedical sensing platforms.