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Related Experiment Video

Updated: Aug 15, 2025

Fabricating Metamaterials Using the Fiber Drawing Method
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Broadband stealth devices based on encoded metamaterials.

Kai Yang, Siqi Shi, Chenxia Li

    Applied Optics
    |January 6, 2023
    PubMed
    Summary

    Researchers developed an achromatic metasurface to reduce chromatic aberration, enabling a stealth device that redirects electromagnetic beams around objects for cloaking between 0.45-0.9 THz.

    Area of Science:

    • Metasurface technology
    • Electromagnetics
    • Optics

    Background:

    • Metasurfaces offer unique electromagnetic properties but often suffer from chromatic aberration.
    • Generalized Snell's law governs metasurface behavior, linking phase gradient to incident frequency.

    Purpose of the Study:

    • To develop an achromatic metasurface principle and design method.
    • To realize a metasurface stealth device with broadband cloaking capabilities.

    Main Methods:

    • Demonstrated the relationship between metasurface phase gradient and incident frequency based on generalized Snell's law.
    • Simultaneously adjusted phase gradient and linear dispersion to achieve achromatic aberration correction.
    • Designed multilayer frame metasurfaces for beam deflection, steering, and collection.

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    Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
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    Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
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    Main Results:

    • Successfully reduced the influence of chromatic aberration on metasurface performance.
    • Achieved a stealth function for electromagnetic beams in the 0.45-0.9 THz range.
    • Demonstrated beam deflection, steering, and collection functionalities.

    Conclusions:

    • The developed achromatic principle, design method, and stealth structure provide a viable approach for transmissive cloaking.
    • The proposed metasurface stealth device effectively redirects electromagnetic waves, preventing scattering and achieving cloaking.
    • This research guides the future development of broadband achromatic metasurfaces for advanced electromagnetic applications.