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Related Experiment Video

Updated: Mar 21, 2026

Development of Whispering Gallery Mode Polymeric Micro-optical Electric Field Sensors
08:32

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Published on: January 29, 2013

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All-polymer whispering gallery mode sensor system.

Ann Britt Petermann, Arthur Varkentin, Bernhard Roth

    Optics Express
    |May 4, 2016
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a polymer resonator array for sensing applications. The novel sensor array can determine unknown wavelengths and measure temperature using whispering gallery modes.

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    Area of Science:

    • Photonics
    • Materials Science
    • Sensor Technology

    Background:

    • Whispering gallery mode (WGM) resonators are widely explored for physical and biological sensing.
    • Traditional WGM sensors often rely on single resonators, limiting their versatility.

    Purpose of the Study:

    • To develop and evaluate an all-polymer resonator array as a novel sensing element.
    • To demonstrate the sensor array's capability for wavelength determination and temperature measurement.

    Main Methods:

    • An array of polymer (PMMA) spheres was fabricated and placed on a polymer optical waveguide (PMMA plate).
    • A tunable narrowband laser was coupled into the waveguide, exciting WGMs in the spheres via the evanescent field.
    • Resonance shifts due to sphere size variations were analyzed for sensing applications.

    Main Results:

    • The polymer resonator array exhibited distinct resonance patterns based on sphere size and wavelength.
    • The device successfully demonstrated its suitability for determining unknown wavelengths.
    • The sensor array was also shown to be effective for temperature measurements.

    Conclusions:

    • An all-polymer resonator array offers a promising platform for WGM-based sensing.
    • The sensor concept is adaptable for various physical measurements, including wavelength and temperature.
    • Further optimization regarding the number and size of sensing elements and laser linewidth is discussed.