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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
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Published on: July 21, 2018

Optical emission from coupled surface plasmons.

R W Gruhlke, W R Holland, D G Hall

    Optics Letters
    |September 10, 2009
    PubMed
    Summary
    This summary is machine-generated.

    Researchers observed optical emission from coupled surface plasmons (CSPs) in corrugated metal films. This emission arises from near-field coupling with adjacent molecules, demonstrating a new pathway for light generation.

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    Area of Science:

    • * Physics, specifically condensed matter physics and optics.
    • * Materials science, focusing on thin metal films and plasmonics.

    Background:

    • * Surface plasmons are collective electron oscillations at a metal-dielectric interface.
    • * Coupled surface plasmons (CSPs) form when surface plasmons on opposite sides of a thin metal film interact.
    • * Interaction with the radiation field typically requires surface irregularities like corrugations.

    Purpose of the Study:

    • * To investigate the optical emission from CSPs.
    • * To explore the role of corrugated metal films in exciting CSPs.
    • * To demonstrate near-field coupling between molecules and CSPs in a specific material system.

    Main Methods:

    • * Fabrication of a thin metal film with surface corrugations.
    • * Embedding the corrugated film within a photoresist dielectric medium.
    • * Excitation of CSPs via near-field coupling with adjacent molecules.
    • * Detection and analysis of optical emission.

    Main Results:

    • * Observation of optical emission originating from the CSPs.
    • * Confirmation that corrugation enables CSP interaction with the radiation field.
    • * Demonstration of efficient excitation of CSPs through near-field coupling with nearby molecules.

    Conclusions:

    • * Corrugated thin metal films can support and emit light from coupled surface plasmons.
    • * Near-field coupling with molecules provides an effective method for exciting CSPs.
    • * This work presents a novel approach for generating optical emission using plasmonic structures.