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Related Experiment Video

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Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
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Tunable beam steering enabled by graphene metamaterials.

B Orazbayev, M Beruete, I Khromova

    Optics Express
    |May 4, 2016
    PubMed
    Summary

    We developed tunable mid-infrared beam steering devices using graphene metamaterials. These devices offer controllable beam direction for advanced infrared imaging and sensing applications.

    Area of Science:

    • Metamaterials
    • Optoelectronics
    • Nanotechnology

    Background:

    • Graphene's unique electronic properties enable novel optical functionalities.
    • Mid-infrared (MIR) technologies require advanced beam manipulation for applications in imaging and sensing.
    • Metamaterials offer unprecedented control over electromagnetic waves.

    Purpose of the Study:

    • To demonstrate tunable mid-infrared (MIR) beam steering devices.
    • To explore graphene-dielectric metamaterials for active beam control.
    • To present novel designs for graphene-based beam steerers.

    Main Methods:

    • Fabrication of multilayer graphene-dielectric metamaterials.
    • Manipulation of graphene's chemical potential to tune refractive index.

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  • Numerical analysis of three distinct beam steerer designs.

    • Main Results:

    • Achieved tunable beam steering with output angles up to approximately 70 degrees.
    • Demonstrated arbitrary tailoring of the transmitted beam's phase distribution.
    • Validated the performance of graded-index, metallic waveguide, and planar waveguide beam steerers.

    Conclusions:

    • Graphene-based metamaterials provide a viable platform for tunable MIR beam steering.
    • The proposed devices offer versatile control over beam direction.
    • Potential applications include tunable transmitter/receiver modules for infrared imaging and sensing.