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Related Experiment Video

Updated: Dec 25, 2025

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
05:57

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Chip-scale blue light phased array.

Min Chul Shin, Aseema Mohanty, Kyle Watson

    Optics Letters
    |April 3, 2020
    PubMed
    Summary
    This summary is machine-generated.

    Researchers developed a compact blue-wavelength optical phased array (OPA) for visible light applications. This chip-scale device achieves wide-angle beam steering, overcoming previous wavelength limitations.

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    Area of Science:

    • Photonics and Optical Engineering
    • Nanotechnology
    • Quantum Information Science

    Background:

    • Compact beam steering is crucial for augmented/virtual reality, optical trapping, and sensing.
    • Optical phased arrays (OPAs) offer chip-scale light manipulation without moving parts.
    • Previous OPA demonstrations were limited to near-infrared due to short-wavelength fabrication challenges.

    Purpose of the Study:

    • To demonstrate the first chip-scale optical phased array operating at blue wavelengths (488 nm).
    • To overcome fabrication and material limitations for visible spectral range OPAs.
    • To enable compact, reconfigurable light projection for advanced applications.

    Main Methods:

    • Utilized a high-confinement silicon nitride platform for OPA fabrication.
    • Employed a sparse aperiodic emitter layout to address short-wavelength constraints.
    • Achieved beam steering using integrated optical phased array technology.

    Main Results:

    • Demonstrated chip-scale OPA operation at 488 nm blue wavelengths.
    • Achieved wide-angle beam steering over a 50° field of view.
    • Obtained a narrow beam with a full width at half-maximum of 0.17°.

    Conclusions:

    • This work presents a breakthrough in visible-light optical phased arrays.
    • The silicon nitride platform enables scalable integration for 3D volumetric light projection.
    • Paves the way for next-generation displays and quantum technologies.