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Evaluating Plasmonic Transport in Current-carrying Silver Nanowires
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Leakage interferences applied to surface plasmon analysis.

Julien Laverdant, Samuel Aberra Guebrou, François Bessueille

    Journal of the Optical Society of America. A, Optics, Image Science, and Vision
    |July 1, 2014
    PubMed
    Summary
    This summary is machine-generated.

    We combined leakage radiation microscopy and a Young slit experiment to measure the spatial coherence of surface plasmon polaritons (SPPs). This method extracts coherence and propagation length for SPPs, crucial for nanoscale optics.

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    Area of Science:

    • Optics and Photonics
    • Condensed Matter Physics
    • Surface Science

    Background:

    • Surface waves, such as surface plasmon polaritons (SPPs), are crucial for nanoscale optical phenomena.
    • Understanding the spatial coherence of SPPs is essential for their application in optical devices.
    • Existing methods for characterizing SPP coherence are limited.

    Purpose of the Study:

    • To experimentally combine leakage radiation microscopy with a Young slit experiment to probe the spatial coherence of surface waves.
    • To apply this technique to surface plasmon polaritons (SPPs).
    • To develop a method for extracting SPP propagation length.

    Main Methods:

    • Experimental setup integrating leakage radiation microscopy and a Young slit interferometer.
    • Measurement of interference contrast and spatial decay of SPPs.
    • Analysis of the relationship between decay and contrast to determine the degree of coherence.

    Main Results:

    • Successfully demonstrated the combination of leakage radiation microscopy and Young's double-slit experiment for analyzing SPP spatial coherence.
    • Quantified the degree of coherence of SPPs based on spatial decay and interference contrast.
    • Investigated coherence properties of plasmons in the weak coupling regime with metallic surfaces.

    Conclusions:

    • The developed method provides a robust way to extract the spatial coherence of surface waves, specifically SPPs.
    • This technique offers a pathway to determine SPP propagation lengths across diverse systems.
    • The findings advance the understanding and manipulation of SPPs for future optical applications.