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Diversified functions for a terahertz metasurface with a simple structure.

Wei-Mang Pan, Jiu-Sheng Li

    Optics Express
    |May 14, 2021
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    Summary

    We developed a novel encoded metasurface capable of dynamically controlling terahertz wavefronts for diverse applications. This single structure achieves multiple functionalities, enhancing terahertz multiple-input, multiple-output (MIMO) communication systems.

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    Area of Science:

    • Metasurfaces
    • Terahertz Technology
    • Wavefront Manipulation

    Background:

    • Metasurfaces offer advanced control over electromagnetic waves.
    • Dynamic manipulation of terahertz wavefronts is crucial for next-generation communications.

    Purpose of the Study:

    • To propose and demonstrate a new encoded metasurface.
    • To achieve dynamic manipulation of terahertz wavefronts.
    • To realize diverse functionalities within a single structure.

    Main Methods:

    • Designing an encoded metasurface with predesigned coding sequences.
    • Utilizing CST Microwave Studio for far-field scattering pattern simulations.
    • Comparing simulation results with theoretical predictions.

    Main Results:

    • The metasurface successfully manipulated terahertz wavefronts.
    • Demonstrated functionalities include beam splitting, anomalous beam deflection, and vortex beam generation.
    • Achieved angle-controlled single-beam, multi-beam, and vortex beam deflections, including multi-vortex beams.

    Conclusions:

    • The proposed encoded metasurface exhibits diversified functionalities at terahertz frequencies.
    • The single-structure design offers significant advantages over conventional methods.
    • This technology shows promising applications in terahertz MIMO communication.