在扭曲石墨烯中敏感的亚THz光检测,具有宽光谱响应
Jiaxin Wu1,2, Meiye Hou3, Shuangxing Zhu1,2
1State Key Laboratory of Micro-Nano Engineering Science, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|October 1, 2025
概括
扭曲的单层-双层石墨烯moiré超级网格可以创建可调节的带隙,以提高光探测器的性能. 这一突破提供了灵敏的宽带光检测,特别是在子特拉赫兹范围内.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 光电学是指光电子产品.
背景情况:
- 石墨烯的光诱导热电子效应推进了超快的光电探测器.
- 石墨烯的内在特性限制了光电转换效率和响应能力.
研究的目的:
- 通过设计石墨烯的带结构来提高光探测器的性能.
- 开发使用莫雷超的灵敏宽带光学探测器.
主要方法:
- 将单层-双层石墨烯堆叠成一个moiré超级网格.
- 制造双门扭曲单层-双层石墨烯 (TMBG) 晶体管.
- 在可见到子特拉赫兹频谱中描述设备性能.
主要成果:
- TMBG晶体管在整个光谱范围内显示一致的响应.
- 确定光热电和玻利米效应作为反应机制.
- 实现了高响应率 (16.9 A/W) 和低噪声等效功率 (27 fW/Hz^1/2) 在0.3 THz和4.5 K,与室温操作.
结论:
- 莫伊尔石墨烯为高性能超宽带探测器提供了一个有前途的平台.
- TMBG晶体管显示出敏感的子特拉赫兹光检测的巨大潜力.
- 莫雷超级网中的可调节带隙是改善光电子设备性能的关键.
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