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Related Experiment Video

Updated: Mar 8, 2026

Synthesis and Operation of Fluorescent-core Microcavities for Refractometric Sensing
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High-sensitivity and wide-range optical sensor based on three cascaded ring resonators.

Yong Liu, Yang Li, Mingyu Li

    Optics Express
    |February 4, 2017
    PubMed
    Summary

    This study presents a novel three cascaded micro-ring resonator sensor for refractive index detection. It achieves high sensitivity and a significantly enhanced measurement range compared to previous designs.

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    Area of Science:

    • Photonics and Optical Sensing
    • Nanotechnology
    • Biomedical Engineering

    Background:

    • Refractive index sensors are crucial for detecting analytes in various fields.
    • Cascaded micro-ring resonators offer enhanced sensitivity for optical sensing applications.
    • Existing two-resonator designs have limitations in measurement range.

    Purpose of the Study:

    • To develop and demonstrate a three cascaded micro-ring resonator based refractive index optical sensor.
    • To significantly improve the measurement range of micro-ring resonator sensors.
    • To achieve high sensitivity for precise refractive index measurements.

    Main Methods:

    • Fabrication of a three cascaded micro-ring resonator structure.
    • Characterization of the sensor's optical response.

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  • Measurement of sensitivity and dynamic range.

    • Main Results:

    • Demonstrated a refractive index optical sensor utilizing three cascaded micro-ring resonators.
    • Achieved a high sensitivity of 5866 nm/RIU.
    • Significantly improved the measurement range by 24.7 times compared to two cascaded resonators.

    Conclusions:

    • The three cascaded micro-ring resonator sensor offers superior performance for refractive index sensing.
    • This enhanced sensor design opens new possibilities for high-performance optical detection.
    • The improved measurement range broadens the applicability of micro-ring resonator sensors.