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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
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Vertical plasmonic resonance coupler.

Yi-Jang Hsu, Yinchieh Lai

    Optics Express
    |April 4, 2015
    PubMed
    Summary
    This summary is machine-generated.

    We developed a novel device for efficient, wavelength-selective light coupling between plasmonic waveguides and free space. This technology enables compact nanoscale photonic circuits with high coupling efficiency.

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    Area of Science:

    • Photonics and Nanotechnology
    • Plasmonics
    • Optical Engineering

    Background:

    • Efficient light coupling between nanoscale plasmonic waveguides and free space is crucial for integrated photonic circuits.
    • Existing methods often lack wavelength selectivity or suffer from low efficiency.

    Purpose of the Study:

    • To theoretically investigate efficient wavelength-selective coupling of light between sub-wavelength plasmonic waveguides and free space.
    • To propose and demonstrate a novel vertical resonance coupling device for nanoscale photonics.

    Main Methods:

    • Theoretical investigation of a device based on plasmonic metal/insulator/metal (MIM) waveguides.
    • Utilizing a vertical grating coupler within a resonance cavity formed by distributed Bragg reflectors (DBRs).
    • Inclusion of metal loss in theoretical calculations.

    Main Results:

    • Achieved maximum coupling efficiency of approximately 50% at 1550 nm wavelength.
    • Demonstrated a filtering 3 dB bandwidth of around 20 nm (7 nm in the lossless case).
    • Proposed and theoretically demonstrated a plasmonic add-drop device utilizing the developed coupler.

    Conclusions:

    • The proposed device enables high-efficiency, wavelength-selective vertical coupling through optical resonance.
    • The compact design holds potential for advancing nanoscale photonic circuitry.
    • This work paves the way for new avenues in integrated plasmonic devices.