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Two dimensional photonic crystal angle sensor design.

Benjamin Neil, Xu Chen, Joshua McCann

    Optics Express
    |May 14, 2021
    PubMed
    Summary
    This summary is machine-generated.

    We developed a new angle sensor using a two-dimensional photonic crystal. This design shows potential for highly sensitive angle measurements, achieving a noise floor of 2.98 × 10-14 rad/sqrt(Hz).

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    Area of Science:

    • Photonics
    • Optical sensing
    • Nanotechnology

    Background:

    • Angle sensors are crucial for various scientific and industrial applications.
    • Existing angle sensing technologies face limitations in sensitivity and precision.
    • Photonic crystals offer unique light manipulation properties for novel sensor designs.

    Purpose of the Study:

    • To introduce a novel angle sensor design utilizing a two-dimensional photonic crystal.
    • To theoretically and experimentally validate the sensor's high sensitivity and performance.
    • To explore design limitations and potential for enhanced sensitivity.

    Main Methods:

    • Simulating photon coupling to internal optical modes of a 2D photonic crystal.
    • Calculating theoretical sensitivity and noise floor.
    • Experimentally demonstrating an angle-sensitive mode in a fabricated photonic crystal.

    Main Results:

    • Simulated sensitivity achieved was 1.61 × 106 V/rad.
    • Projected noise floor for angle measurements is 2.98 × 10-14 rad/sqrt(Hz).
    • Experimental proof of concept demonstrated an angle-sensitive photonic crystal mode.

    Conclusions:

    • The proposed photonic crystal angle sensor design offers unprecedented sensitivity.
    • Further optimization can potentially increase device sensitivity beyond current predictions.
    • This technology holds promise for next-generation high-precision angle measurement systems.