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Related Experiment Video

Updated: Jan 19, 2026

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

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Passive fluidic micro-sensor with all-optical readout realized using a direct laser writing technique.

Sima Rekštytė, Domas Paipulas, Vygantas Mizeikis

    Optics Letters
    |September 14, 2019
    PubMed
    Summary

    Researchers developed novel solvent-sensitive microstructures using 3D periodic lattices in photoresist. These microstructures change size in solvents, enabling optical readout via Moiré pattern modification for sensitive micro-sensing applications.

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    Area of Science:

    • Materials Science
    • Microfabrication
    • Optical Sensing

    Background:

    • Polymeric microstructures offer tunable properties for sensing applications.
    • Developing sensitive and easily readable micro-sensors is crucial for various fields.
    • Optical readout methods provide non-invasive and high-resolution detection.

    Purpose of the Study:

    • To design and fabricate solvent-sensitive microstructures using 3D periodic lattices.
    • To demonstrate optical readout of solvent-induced changes via Moiré pattern analysis.
    • To realize a compact micro-sensor based on these principles.

    Main Methods:

    • Fabrication of 3D periodic lattices in polymeric photoresist using direct laser writing.
    • Immersion of microstructures in wetting and non-wetting solvents to induce size changes.
    • Optical readout by observing Moiré pattern modifications between deformable and rigid gratings.

    Main Results:

    • Successful design and realization of solvent-sensitive polymeric microstructures.
    • Demonstration of reversible size changes in response to different solvents.
    • High sensitivity and straightforward optical readout of the micro-sensor were achieved.

    Conclusions:

    • The developed microstructures and sensing principle are effective for solvent detection.
    • The Moiré pattern readout offers a simple and sensitive method for micro-sensor applications.
    • This technology holds potential for integration into microfluidic systems and lab-on-a-chip devices.