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Multi-parameter optical sensing platform based on III-nitride quantum well diodes.

Kang Fu, Wenxuan Wu, Ziqi Ye

    Optics Express
    |May 4, 2026
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel optical sensing platform using III-nitride quantum well (QW) diodes for simultaneous light emission and detection. The system achieves precise, non-contact distance and weight sensing, demonstrating potential for flexible electronics.

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    Area of Science:

    • Optoelectronics
    • Semiconductor devices
    • Materials science

    Background:

    • III-nitride quantum well (QW) diodes possess unique properties enabling simultaneous light emission and detection.
    • This characteristic allows for the development of multifunctional optoelectronic devices.
    • Existing sensing technologies may lack the desired low-cost, miniaturized, and non-contact capabilities.

    Purpose of the Study:

    • To demonstrate a multi-parameter optical sensing platform utilizing III-nitride QW diodes.
    • To achieve low-cost, miniaturized, and non-contact real-time sensing of distance and weight.
    • To validate the sensing accuracy using a multilayer perceptron (MLP) model.

    Main Methods:

    • Two identical III-nitride QW diodes were configured as transmitter and receiver in a free-space optical path on flexible printed circuit boards (FPCBs).
    • The distance between the diodes was varied to perform distance sensing.
    • Weight was applied to the sensing path to perform weight sensing.
    • A multilayer perceptron (MLP) was employed for accurate data regression.

    Main Results:

    • The platform successfully achieved non-contact distance sensing up to 5 cm with a 1 mm resolution.
    • Accurate weight sensing up to 10 g with a 100 mg resolution was demonstrated.
    • The MLP model enabled precise regression of both distance and weight measurements.

    Conclusions:

    • The developed III-nitride QW diode-based platform offers a promising solution for multi-parameter optical sensing.
    • The system exhibits advantages like environmental friendliness, structural simplicity, and scalability.
    • Potential applications include flexible electronics, wearable devices, and advanced non-contact sensing systems.