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Electrically pumped hybrid plasmonic waveguide.

Thamani Wijesinghe, Malin Premaratne, Govind P Agrawal

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    |March 26, 2014
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    Summary
    This summary is machine-generated.

    This study explores a novel metal-insulator-semiconductor (MIS) waveguide for nanophotonics. Results show potential for low-loss surface plasmon polariton (SPP) propagation with strong field confinement in an electrically pumped device.

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    Area of Science:

    • Nanophotonics
    • Plasmonics
    • Semiconductor devices

    Background:

    • Active plasmonic waveguiding is crucial for nanophotonic devices.
    • Metal-insulator-semiconductor (MIS) structures offer potential for integrated photonic circuits.

    Purpose of the Study:

    • To theoretically investigate the performance of an Au/GaSb-based MIS structure as a hybrid electrically pumped waveguide with gain.
    • To analyze the surface-plasmon polariton (SPP) mode in the third telecommunication window.

    Main Methods:

    • Theoretical analysis of an Au/GaSb-based MIS structure.
    • Numerical simulation of SPP mode properties (effective mode index, confinement factor, effective mode area) for varying dimensions.
    • Self-consistent numerical technique to analyze electrical behavior and material/model gains.

    Main Results:

    • Demonstrated SPP mode supported by the MIS configuration.
    • Illustrated changes in effective mode index, confinement factor, and effective mode area with varying core and layer thicknesses.
    • Showcased the electrical behavior of the MIS junction and its impact on gain.

    Conclusions:

    • The Au/GaSb-based MIS structure can achieve low-loss SPP propagation.
    • Strong field confinement is maintained within the waveguide.
    • This configuration shows promise for electrically pumped active plasmonic devices.