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Related Experiment Video

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Single-photon image sensor at room temperature with only four anodes.

Yu Peng, Lei Dai, Tianqi Zhao

    Optics Express
    |September 13, 2019
    PubMed
    Summary

    A novel silicon photomultiplier sensor achieves high-resolution single-photon imaging at room temperature. This device can image dark counting sites, paving the way for advanced sensor applications.

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    Area of Science:

    • Photonics
    • Semiconductor Devices
    • Imaging Technology

    Background:

    • Traditional single-photon imaging sensors face limitations in resolution and sensitivity.
    • Developing room-temperature, high-resolution single-photon detectors is crucial for various scientific applications.

    Purpose of the Study:

    • To evaluate the performance of a two-dimensional tetra-lateral position-sensitive cap-resistive-layer silicon photomultiplier (CRL-SiPM) as a single-photon imaging sensor.
    • To assess the spatial resolution and imaging capabilities of the CRL-SiPM at room temperature.

    Main Methods:

    • Utilized a CRL-SiPM with a 2.77 mm × 2.77 mm active area and ~10 μm micro-avalanche photodiode cell pitch.
    • Performed single-photon imaging experiments to determine position resolution at varying light intensities.
    • Investigated the device's capability for lensless imaging of dark counting sites.

    Main Results:

    • Achieved a 150 μm-linewidth-resolved single-photon image, approaching the theoretical intrinsic resolution limit of ~115 μm.
    • Demonstrated improved position resolution with increasing light intensity, reaching 14.08 μm at 41.56 mean photoelectrons.
    • Successfully performed lensless imaging of dark counting sites, showcasing the sensor's single photoelectron imaging capability.

    Conclusions:

    • The CRL-SiPM is a viable room-temperature sensor for high-resolution single-photon imaging.
    • The sensor's position resolution is dependent on light intensity, improving significantly with higher photon counts.
    • The ability to image dark counting sites opens new avenues for studying thermal carrier dynamics and device breakdown phenomena.