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Related Experiment Video

Updated: Mar 11, 2026

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
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Higher-order surface plasmon contributions to passive and active plasmonic interferometry.

Dongfang Li, Jing Feng, Domenico Pacifici

    Optics Express
    |December 2, 2016
    PubMed
    Summary

    Researchers studied light transmission and fluorescence in plasmonic interferometers. They discovered higher-order interference effects in surface plasmon polaritons (SPPs) and found ways to control them, enhancing light manipulation possibilities.

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    Area of Science:

    • Plasmonics and Nanophotonics
    • Optical Interferometry
    • Surface Plasmon Polaritons (SPPs)

    Background:

    • Planar plasmonic interferometers offer unique light modulation capabilities.
    • Understanding interference effects in surface plasmon polaritons (SPPs) is crucial for advanced optical devices.

    Purpose of the Study:

    • To compare light transmission and fluorescence modulation in plasmonic interferometers.
    • To investigate higher-order interference effects in SPPs.
    • To explore methods for controlling and enhancing SPP interference.

    Main Methods:

    • Fabrication of plasmonic interferometers with nano-scale holes and circular grooves in silver films.
    • Analysis of optical interferograms by varying SPP propagation phase.
    • Application of Discrete Fast Fourier Transform (DFT) for analyzing plasmonic interferograms.
    • Comparison of experimental results with finite-difference frequency-domain (FDFD) calculations.

    Main Results:

    • Observed and characterized higher-order interference effects in SPPs.
    • Demonstrated enhancement of these effects through optimized in-plane SPP scattering and reflection.
    • Validated experimental SPP dispersion relations with FDFD simulations.
    • Showed that odd-order SPP contributions can be suppressed by reducing incident beam spatial coherence.

    Conclusions:

    • Plasmonic interferometers exhibit complex higher-order interference phenomena.
    • Optimization of SPP scattering and reflection allows for enhancement of these effects.
    • Control over SPP contributions, including suppression of odd-order terms, is achievable by manipulating incident beam properties.