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Related Experiment Video

Updated: Jun 12, 2026

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
07:39

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

Published on: July 21, 2018

Optical chemical sensor based on surface plasmon measurement.

K Matsubara, S Kawata, S Minami

    Applied Optics
    |June 10, 2010
    PubMed
    Summary
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    A novel optical chemical sensor uses surface plasmon resonance for reagent-free detection in liquids or gases. This compact sensor achieves a low detection limit for ethanol in water, demonstrating its practical application.

    Area of Science:

    • Analytical Chemistry
    • Optoelectronics
    • Materials Science

    Background:

    • Chemical sensing often relies on reagents, increasing complexity and cost.
    • Surface plasmon resonance (SPR) offers a label-free detection method.
    • Existing SPR systems can be bulky and complex due to mechanical components.

    Purpose of the Study:

    • To develop a compact and simple optical chemical sensor.
    • To utilize light-excited surface plasmon measurement for chemical detection.
    • To demonstrate reagent-free concentration measurement of chemical species.

    Main Methods:

    • Developed an optical chemical sensor based on light-excited surface plasmon measurement.
    • Employed multichannel angular light intensity detection with a photodiode array.

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    Optical Trapping of Plasmonic Nanoparticles for In Situ Surface-Enhanced Raman Spectroscopy Characterizations
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    Optical Trapping of Plasmonic Nanoparticles for In Situ Surface-Enhanced Raman Spectroscopy Characterizations

    Published on: June 23, 2022

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    Last Updated: Jun 12, 2026

    Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
    07:39

    Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

    Published on: July 21, 2018

    Optical Trapping of Plasmonic Nanoparticles for In Situ Surface-Enhanced Raman Spectroscopy Characterizations
    06:19

    Optical Trapping of Plasmonic Nanoparticles for In Situ Surface-Enhanced Raman Spectroscopy Characterizations

    Published on: June 23, 2022

  • Utilized a Fourier transform optical setup for compact sensor design, eliminating moving parts.

    • Main Results:

    • Successfully measured ethanol concentration in water without reagents.
    • Determined the resonance condition based on the dielectric constant of the sample.
    • Achieved a detection limit of 10(-4) wt./wt. for ethanol in water.

    Conclusions:

    • The developed optical sensor is compact, simple, and reagent-free.
    • The sensor effectively measures chemical concentrations by analyzing surface plasmon resonance.
    • The system shows promise for accurate and sensitive chemical analysis in various media.