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Related Concept Videos

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Potential Due to a Polarized Object

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A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
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Updated: Apr 8, 2026

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
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Strong coupling between localized and propagating plasmon polaritons.

Sinan Balci, Ertugrul Karademir, Coskun Kocabas

    Optics Letters
    |July 1, 2015
    PubMed
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    We demonstrate ultrastrong plasmon-plasmon coupling between localized and propagating surface plasmon polaritons using silver nanoprisms on silver films. This tunable platform enables studying coupling across various regimes and wavelengths.

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    Area of Science:

    • Plasmonics
    • Nanophotonics
    • Condensed Matter Physics

    Background:

    • Plasmon-plasmon (PP) coupling is crucial for understanding light-matter interactions in nanostructured metals.
    • Achieving strong and ultrastrong coupling regimes is essential for advanced optical devices.
    • Metal nanoparticle-metal thin film systems offer tunable platforms for studying plasmon coupling.

    Purpose of the Study:

    • To investigate plasmon-plasmon coupling in the strongly interacting regimes.
    • To develop a tunable plasmonic platform for studying coupling from weak to ultrastrong regimes.
    • To explore the control of PP coupling through nanoprism concentration and plasmon damping.

    Main Methods:

    • Utilized a tunable plasmonic platform with triangular silver nanoprisms on silver thin films.
    • Synthesized size-tunable silver nanoprisms using a seed-mediated growth method.
    • Immobilized nanoprisms on Si(3)N(4) films to control localized surface plasmon polariton (SPP) resonances.

    Main Results:

    • Achieved PP coupling between localized SPPs of nanoprisms and propagating SPPs of the film.
    • Demonstrated control over PP coupling by varying nanoprism concentration and plasmon damping.
    • Observed Rabi splitting energies up to several hundreds meV, indicating ultrastrong coupling.

    Conclusions:

    • The metal nanoparticle-metal thin film hybrid system enables ultrastrong coupling between localized and propagating SPPs.
    • This platform provides a versatile configuration for studying PP coupling over a broad range of wavelengths.
    • The findings pave the way for novel applications in nanophotonics and optical devices.