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Exciting surface plasmons on metal-coated multimode optical waveguides using skew rays.

Chunyang Han, John Canning, Kevin Cook

    Optics Letters
    |November 15, 2016
    PubMed
    Summary

    This study demonstrates multipoint surface plasmon resonance (SPR) excitation in a plastic optical waveguide using skew rays. The research validates a new method for measuring SPR angles, aligning with theoretical predictions.

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    Area of Science:

    • Optoelectronics
    • Plasmonics
    • Waveguide Optics

    Background:

    • Surface Plasmon Resonance (SPR) is a sensitive optical phenomenon used for various sensing applications.
    • Traditional SPR excitation often relies on specific coupling geometries.
    • Multimode optical waveguides offer potential for enhanced light manipulation.

    Purpose of the Study:

    • To investigate multipoint SPR excitation within a plastic optical waveguide using skew rays.
    • To analyze the theoretical and experimental impact of skew rays on SPR performance.
    • To introduce and validate a novel method for measuring SPR angles.

    Main Methods:

    • Utilizing a multimode plastic optical waveguide coated with gold (Au).
    • Employing skew rays for multipoint SPR excitation.
    • Conducting both theoretical calculations and experimental measurements of SPR angles.

    Main Results:

    • Successful demonstration of multipoint SPR excitation.
    • Quantification of the effect of skew rays on SPR performance.
    • Experimental SPR angle measurements show agreement with theoretical predictions.

    Conclusions:

    • Skew rays can be effectively utilized for multipoint SPR excitation in plastic optical waveguides.
    • The developed method provides accurate SPR angle measurements.
    • This approach offers a new avenue for SPR-based sensing technologies.