Remote terahertz wireless power transfer with self-resonating spoof plasmonic structures

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.