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A 6G meta-device for 3D varifocal.

Jing Cheng Zhang1,2, Geng-Bo Wu1,2, Mu Ku Chen1,2

  • 1Department of Electrical Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR, China.

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|January 27, 2023
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Researchers designed meta-devices for sixth-generation (6G) communication, enabling precise control over terahertz beams for secure and flexible wireless systems. This innovation enhances signal directivity and coverage area without costly active components.

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Area of Science:

  • Metamaterials and Optics
  • Wireless Communication Technologies

Background:

  • Sixth-generation (6G) communication systems aim for superior performance over fifth-generation (5G), with a focus on precise information transfer directivity and signal strength concentration.
  • Controlling terahertz (THz) beams is crucial for achieving these 6G objectives, enabling advanced applications.

Purpose of the Study:

  • To synthetically design varifocal meta-devices capable of controlling terahertz beam propagation direction and coverage area.
  • To enable arbitrary positioning of focusing spots in 2D and 3D space for targeted signal delivery.
  • To facilitate secure, flexible, and high-directivity 6G communication systems while minimizing the need for active components.

Main Methods:

  • Synthetic phase design of rotary doublet Airy beam and triplet Gaussian beam meta-devices.
  • Utilizing meta-devices to manipulate terahertz beam characteristics, including direction and focal point.
  • Demonstrating control over beam propagation and focusing for targeted signal delivery.

Main Results:

  • Achieved full control over terahertz beam propagation direction and coverage area using designed meta-devices.
  • Demonstrated the ability to deliver focusing spots to arbitrary positions in two-dimensional and three-dimensional spaces.
  • Enabled highly concentrated signal delivery to specific locations with freely adjustable transmission direction.

Conclusions:

  • The developed meta-device technology offers a cost-effective solution for enhancing 6G communication systems by avoiding extensive use of active components.
  • This technology is poised to benefit various applications including 6G communications, wireless power transfer, zoom imaging, and remote sensing through large-scale adoption.