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Related Concept Videos

Biasing of Metal-Semiconductor Junctions01:27

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Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
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Related Experiment Video

Updated: Feb 20, 2026

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
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Tunable Goos-Hänchen shift from graphene ribbon array.

Xiaodong Zeng, M Al-Amri, M Suhail Zubairy

    Optics Express
    |October 19, 2017
    PubMed
    Summary
    This summary is machine-generated.

    Researchers studied the Goos-Hänchen (GH) shift in graphene ribbon arrays. They observed giant positive and negative shifts due to leaky surface plasmons, controllable by tuning the graphene Fermi level.

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    Area of Science:

    • Optics and Photonics
    • Materials Science
    • Condensed Matter Physics

    Background:

    • The Goos-Hänchen (GH) shift describes the transverse displacement of a light beam upon reflection.
    • Graphene's unique electronic properties make it a promising material for optical devices.

    Purpose of the Study:

    • To investigate the Goos-Hänchen (GH) shift of a light beam interacting with a graphene ribbon array.
    • To explore the influence of leaky surface plasmon resonance on the GH shift.
    • To demonstrate the tunability of the GH shift by controlling graphene's Fermi level.

    Main Methods:

    • Utilized the Green's function method to analyze the optical response.
    • Simulated light beam incidence on a periodic array of graphene ribbons.
    • Investigated the zeroth-order reflection field characteristics.

    Main Results:

    • Observed significant positive and negative Goos-Hänchen shifts.
    • Attributed the giant shifts to the resonance effects of leaky surface plasmons on the graphene ribbons.
    • Demonstrated convenient control over the GH shift by tuning the graphene Fermi level.

    Conclusions:

    • The study highlights the potential for giant Goos-Hänchen shifts in graphene ribbon arrays.
    • This phenomenon is crucial for developing advanced graphene-based metasurfaces.
    • The findings are relevant for novel electro-optical device applications.