聊城大学学报（自然科学版）2026，Vol.39Issue(4)：535-543,9.DOI:10.19728/j.issn1672-6634.2025120004
面向6G通信的场调控拓扑超表面太赫兹探测器
Field-controlled topological metasurface Terahertz detector for 6G communications
摘要
Abstract
To enhance the performance of terahertz detectors,this study designed and fabricated a tera-hertz detection device based on an topological metasurface and an MnBi2Te4 thin film.The L-shaped subwavelength microstructures were fabricated using 3D printing technology,and the MnBi2Te4 thin layer was deposited via magnetron sputtering.By leveraging the topological surface state properties of MnBi2Te4 and the localized surface plasmon resonance effect of the L-shaped structure,strong localization of tera-hertz waves and efficient energy coupling were achieved.The device's performance in the 0.1 THz frequen-cy band was characterized experimentally:without external field,the responsivity(RA)reached 1.72 A/W,the noise-equivalent power(NEP)was as low as 8.23 pW/Hz1/2,and the detectivity(D*)peaked at 5.43×109 cm·Hz1/2/W.After applying an external magnetic field(0.145 mT)and laser(50 mW),the RA was maximally increased to 3.01 A/W,the NEP was reduced to 5.69 pW/Hz1/2,and the D* reached 7.85×109 cm·Hz1/2/W.The research indicates that the L-shaped topological structure and the enhancement effects of the magnetic/optical field can significantly optimize the photoelectric conversion efficiency and noise suppression capability of the detector,providing a new solution for high-performance terahertz detec-tion.关键词
太赫兹探测器/拓扑超表面/MnBi2Te4薄膜Key words
Terahertz detector/topological metasurface/MnBi2Te4 film分类
信息技术与安全科学引用本文复制引用
许文浩,孙作昂,王文哲,张敏,宋琦..面向6G通信的场调控拓扑超表面太赫兹探测器[J].聊城大学学报（自然科学版）,2026,39(4):535-543,9.基金项目
国家自然科学基金项目(12104314) （12104314）
山东省自然科学基金项目(ZR2024QF217) （ZR2024QF217）
山东省高等学校青年创新团队发展计划项目(2024KJH132)资助 （2024KJH132）
