High-performance 3D terahertz detector based on a Co₃Sn₂S₂ thin-film triple-layer rectangular structure.

Area of Science:

• Physics
• Materials Science
• Electrical Engineering

Background:

• Advancing 6G technology requires high-performance terahertz detectors operating at room temperature.
• Existing detectors often face limitations in response speed, noise levels, and manufacturing costs.

Purpose of the Study:

• To design and fabricate a high-response, low-noise terahertz detector for 6G applications.
• To explore the potential of combining metamaterials with Weyl semimetals for enhanced detector performance.
• To investigate the device's multifunctional capabilities through external light field modulation.

Main Methods:

• Designed a terahertz detector integrating a metamaterial with 3D gradient and ring structures with Weyl semimetal thin films.
• Fabricated the detector using high-precision 3D printing and magnetron sputtering.
• Characterized the detector's performance, including photoresponsivity and noise equivalent power.

Main Results:

• Achieved a photoresponsivity of 9847.77 mA/W at 0.1 THz.
• Reduced the noise equivalent power to 3.50 pW/Hz^-1/2.
• Demonstrated the detector's potential for multifunctional applications via external light field modulation.

Conclusions:

• The developed terahertz detector offers a promising solution for 6G technology adoption due to its high performance and low-cost fabrication.
• The integration of metamaterials and Weyl semimetals is effective for creating advanced terahertz detection devices.
• The device's multifunctionality opens new avenues for terahertz applications in future communication systems.