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Generating Electromagnetic Radiations01:10

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The German physicist Heinrich Hertz (1857–1894) was the first to generate and detect certain types of electromagnetic waves in the laboratory. Starting in 1887, he performed a series of experiments that confirmed the existence of electromagnetic waves and verified that they travel at the speed of light. Hertz used an alternating-current RLC (resistor-inductor-capacitor) circuit that resonated at a known frequency and connected it to a loop of wire. High voltages induced across the gap in...
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Remote terahertz wireless power transfer with self-resonating spoof plasmonic structures.

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    Area of Science:

    • Physics
    • Electromagnetics
    • Materials Science

    Background:

    • Wireless power transfer (WPT) is crucial for modern electronics.
    • Terahertz (THz) frequencies offer unique properties for WPT.
    • Existing THz WPT methods face challenges in efficiency and environmental impact.

    Purpose of the Study:

    • To develop a novel remote non-radiative terahertz wireless power transfer system.
    • To investigate the use of self-resonating spoof plasmonic structures for THz WPT.
    • To achieve efficient power transfer over extended distances with minimal free-space electromagnetic disturbance.

    Main Methods:

    • Utilized a pair of self-resonating subwavelength spoof plasmonic structures.
    • Tuned the resonating frequency and quality factor of the magnetic dipole mode via geometric tailoring.
    • Integrated weak power sources and detectors within the self-resonating structures.

    Main Results:

    • Achieved effective non-radiative terahertz power transfer over distances hundreds of times the structure's radius.
    • Demonstrated tunable resonating frequency and quality factor by modifying geometric structure.
    • Showcased efficient wireless power transfer to a multi-target receiving system.

    Conclusions:

    • The proposed spoof plasmonic structures enable efficient remote non-radiative terahertz wireless power transfer.
    • The system offers long-distance power delivery with negligible impact on the surrounding electromagnetic environment.
    • This work presents a promising new direction for terahertz wireless power transfer and communication systems.