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Related Experiment Video

Updated: Dec 18, 2025

Evaluating Plasmonic Transport in Current-carrying Silver Nanowires
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Plasmonic nanojet: an experimental demonstration.

Igor V Minin, Oleg V Minin, Igor A Glinskiy

    Optics Letters
    |June 16, 2020
    PubMed
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    Researchers developed a dielectric cuboid on a metal film to focus surface plasmons (SPs) at the subwavelength scale. This novel plasmonic lens enables the first experimental observation of the plasmonic nanojet effect for SP waves.

    Area of Science:

    • Plasmonics and Nanophotonics
    • Optical Metamaterials
    • Subwavelength Optics

    Background:

    • Surface plasmon polaritons (SPPs) are electromagnetic waves confined to metal-dielectric interfaces.
    • Focusing SPPs at the subwavelength scale is crucial for advanced optical applications.
    • Existing methods for SPP focusing often face limitations in resolution and efficiency.

    Purpose of the Study:

    • To propose and investigate a novel microstructure for efficient subwavelength focusing of surface plasmons.
    • To demonstrate the formation of a plasmonic nanojet (PJ) using this microstructure.
    • To achieve the first experimental observation of the PJ effect for SPP waves.

    Main Methods:

    • Numerical simulations of SPP field intensity distributions.

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    Last Updated: Dec 18, 2025

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    Evaluating Plasmonic Transport in Current-carrying Silver Nanowires

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    Plasmonic Trapping and Release of Nanoparticles in a Monitoring Environment
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  • Fabrication of a dielectric cuboid on a thin metal film microstructure.
  • Characterization using amplitude and phase-resolved scattering-type scanning near-field optical microscopy (s-SNOM).

    • Main Results:

    • Observation of high-intensity subwavelength spots.
    • Formation of a plasmonic nanojet (PJ) at a telecommunication wavelength (1530 nm).
    • Experimental confirmation of the PJ effect for SPP waves, validating simulation predictions.

    Conclusions:

    • The proposed dielectric cuboid microstructure acts as an efficient plasmonic lens.
    • This platform enables subwavelength focusing and the observation of the SPP nanojet effect.
    • The technology offers potential for high-resolution imaging, biophotonics, and optical data storage.