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Nanophotonic coherent imager.

Firooz Aflatouni, Behrooz Abiri, Angad Rekhi

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    Summary
    This summary is machine-generated.

    A novel silicon nanophotonic coherent imager (NCI) achieves high-resolution 3D imaging by measuring optical wave properties. This technology overcomes traditional limits, enabling detailed reflective, transmissive, and index contrast imaging.

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    Area of Science:

    • Photonics
    • Nanotechnology
    • Optical Imaging

    Background:

    • Traditional imaging techniques face limitations in resolution and depth detection.
    • Silicon nanophotonics offers a platform for integrated optical systems.

    Purpose of the Study:

    • To report an integrated silicon nanophotonic coherent imager (NCI) for high-resolution 3D imaging.
    • To demonstrate the NCI's capability in overcoming conventional resolution limits.

    Main Methods:

    • Development of a 4 × 4 array of coherent pixels.
    • Implementation of a modified time-domain frequency modulated continuous wave (FMCW) ranging scheme.
    • Concurrent time-domain measurements of period and zero-crossing time for optical wave analysis.

    Main Results:

    • Achieved 15μm depth resolution and 50μm lateral resolution in 3D imaging.
    • Demonstrated imaging up to a 0.5-meter range.
    • Successfully detected a 1% equivalent refractive index contrast in 1mm thick samples.

    Conclusions:

    • The NCI provides high-resolution 3D imaging capabilities, including reflective, transmissive, and index contrast imaging.
    • The integrated nanophotonic approach overcomes traditional resolution limitations in optical ranging.
    • This technology has potential applications in various fields requiring precise imaging.