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    This summary is machine-generated.

    This study introduces an asymmetric universal invisible gateway applicable to any wall material, unlike previous methods limited to perfect electric conductor (PEC) walls. Its unique structure creates different detection outcomes depending on the observer's position.

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    Area of Science:

    • Electromagnetism
    • Metamaterials
    • Transformation Optics

    Background:

    • Existing invisible gateway designs rely on the super-scattering effect, limiting their application to perfect electric conductor (PEC) walls.
    • The practical application of invisible gateways is hindered by the lack of designs for non-PEC wall materials.

    Purpose of the Study:

    • To design a universal invisible gateway applicable to arbitrary wall materials using transformation optics.
    • To investigate the unique detection characteristics arising from the gateway's asymmetric structure.

    Main Methods:

    • Employing transformation optics to design an asymmetric invisible gateway.
    • Analyzing the electromagnetic wave interaction with arbitrary wall materials and the designed gateway.

    Main Results:

    • Demonstrated a universal invisible gateway design that accommodates various wall materials beyond PEC.
    • Observed asymmetric detection results: one side perceives a complete wall, while the other detects the gateway.

    Conclusions:

    • The developed asymmetric invisible gateway offers versatility for different wall materials.
    • The directional detection property presents novel possibilities for specific applications of cloaking technology.