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

Developing high-response, low-noise room-temperature terahertz detectors is one of the key points for 6G technology to achieve widespread adoption. To address this, we designed a high-performance terahertz detector combining a metamaterial composed of three-dimensional gradient structures and ring structures with Weyl semimetal thin films. Fabricated using high-precision 3D printing and magnetron sputtering techniques, this detector enables low-cost, repeatable processing. Furthermore, our proposed terahertz detector achieves a photoresponsivity of 9847.77 mA/W at 0.1 THz, with noise equivalent power reduced to 3.50pWHz^-1/2. We also explore the multifunctional potential of the device by modulating it with an external light field, contributing to advancing 6G technology into a new phase.