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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
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Actively tunable toroidal response in microwave metamaterials.

Hong Wang, Yingying Yu, Rui Zeng

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    |April 27, 2022
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    Summary
    This summary is machine-generated.

    This study introduces actively tunable toroidal metamaterials for real-time control of toroidal dipole moments. These metamaterials enable dynamic switching and directional control, paving the way for advanced applications.

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    Area of Science:

    • Electromagnetism and Metamaterials Science

    Background:

    • Toroidal dipole moments exhibit unique electromagnetic properties like non-reciprocal interactions.
    • Existing toroidal dipole moments lack real-time control over direction and intensity.

    Purpose of the Study:

    • To propose and demonstrate actively tunable toroidal metamaterials for programmable manipulation of toroidal dipole moments.
    • To achieve real-time electric control over the intensity and direction of toroidal dipole responses.

    Main Methods:

    • Design and fabrication of toroidal metamaterials integrated with electrically controlled diodes.
    • Experimental and numerical investigations to validate the tunable electromagnetic response.

    Main Results:

    • Demonstrated sensitive regulation of toroidal dipole intensity and direction via electrical control of loaded diodes.
    • Successfully achieved dynamic switching between toroidal, electric, and magnetic dipole responses.
    • Experimental and numerical results showed strong agreement, confirming the metamaterials' performance.

    Conclusions:

    • The proposed actively tunable toroidal metamaterials offer precise control over toroidal dipole moments.
    • These metamaterials have potential applications in developing advanced modulators, sensors, and filters.