太赫兹辐射
响应度
材料科学
光电效应
光电子学
光探测
噪声等效功率
超短脉冲
光学
光电探测器
功勋
探测器
太赫兹间隙
红外线的
物理
远红外激光器
激光器
太赫兹超材料
作者
Jingbo Li,Wanli Ma,Lin Jiang,Niangjuan Yao,Jie Deng,Qinxi Qiu,Yi Shi,Wei Zhou,Zhiming Huang
标识
DOI:10.1021/acsami.2c00175
摘要
Photoelectric detection is developing rapidly from ultraviolet to infrared band. However, terahertz (THz) photodetection approaches is constrained by the bandgap, dark current, and absorption ability. In this work, room-temperature photoelectric detection is extended to the THz range implemented in a planar metal-NbSe2-metal structure based on an electromagnetic induced well (EIW) theory, exhibiting an excellent broadband responsivity of 5.2 × 107 V W-1 at 0.027 THz, 7.8 × 106 V W-1 at 0.173 THz, and 9.6 × 105 V W-1 at 0.259 THz. Simultaneously, the NbSe2 photoelectric detector (PD) with ultrafast response speed (∼610 ns) and ultralow equivalent noise power (4.6 × 10-14 W Hz-1/2) in the THz region is realized, enabling high-resolution imaging. The figure of merit (FOM) characterizing the detection performance of the device is 2 orders of magnitude superior to that of the reported THz PDs based 2D materials. Furthermore, the THz response speed is 2 orders of magnitude faster than that of the visible due to the different response mechanisms of the device. Our results exhibit promising potential to achieve highly sensitive and ultrafast photoelectric detection.
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