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Related Experiment Video

Updated: Dec 13, 2025

Evaluating Plasmonic Transport in Current-carrying Silver Nanowires
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Transmission enhanced SPR nano-microscope.

Jingkai Ji, Libo Yuan

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    PubMed
    Summary
    This summary is machine-generated.

    We developed a novel surface plasmon resonance nano-microscope using a fiber optic probe. This technology enhances microscopic imaging, enabling nano-imaging beyond the diffraction limit for detailed nanoscale analysis.

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    Area of Science:

    • Optics and Photonics
    • Nanotechnology
    • Microscopy

    Background:

    • Surface Plasmon Resonance (SPR) is a phenomenon used for sensing and imaging.
    • Conventional microscopy faces limitations due to the diffraction limit.
    • Fiber-optic probes offer compact and versatile platforms for optical measurements.

    Purpose of the Study:

    • To propose and demonstrate a transmission enhanced surface plasmon resonance nano-microscope.
    • To achieve nano-imaging capabilities by overcoming the diffraction limit.
    • To utilize a novel fiber-optic probe design for enhanced SPR excitation.

    Main Methods:

    • Fabrication of a nano-microscope at the end of a cone-frustum-shaped annular-core fiber (ACF) via mechanical polishing.
    • Deposition of a gold film on the ACF end surface using magnetron sputtering to excite surface plasmon resonance (SPR).
    • Utilizing the cone-frustum-shaped ACF end surface as a stage for nano-imaging with SPR enhancement.

    Main Results:

    • Successful excitation of SPR directed radially towards the fiber center.
    • Demonstration of nano-imaging capabilities surpassing the diffraction limit.
    • Elimination of smear images caused by unidirectional surface plasmon wave (SPW) illumination, as shown with 300nm polystyrene nano-spheres.

    Conclusions:

    • The proposed transmission enhanced SPR nano-microscope effectively achieves nano-imaging.
    • The device overcomes the diffraction limit, offering enhanced resolution.
    • This technology provides a promising approach for advanced microscopic imaging applications.