基于Te纳米线光热电效应的室温高灵敏太赫兹探测器
作者:
作者单位:

1.北京信息科技大学;2.清华大学 工程物理系;3.危爆物品探测技术国家工程研究中心;4.广东工业大学 材料与能源学院

基金项目:

国家自然科学基金项目(面上项目,重点项目,重大项目),



Room-temperature highly sensitive terahertz detector based on the photothermoelectric effect of Te nanowires
Author:
Affiliation:

1.Beijing Information Science and Technology University,School of Instrumentation Science and Optoelectronic Engineering;2.Tsinghua University,Department of Engineering Physics;3.National Engineering Research Center for Detection of Dangerous Articles and Explosives Detection Technologies;4.Guangdong University of Technology,School of Materials and Energy

Funding:

The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    室温工作的高灵敏探测器是实现太赫兹技术广泛应用迫切需要的核心器件。本文研制了一种基于光热电效应的室温太赫兹探测器,以碲(Te)纳米线作为沟道材料,采用倾角蒸镀方法制备了长度百纳米以下的探测沟道,通过非对称金属掺杂Te纳米线,使其两端具有非对称的热电特性。实验测试表明,该类型器件在0.288 THz光照下平均响应度可达54.63 V/W,噪声等效功率为33.5 pW/Hz1/2,响应时间为71.1 μs,实现了室温条件下高灵敏快速太赫兹探测。

    Abstract:

    Highly sensitive detectors operating at room temperature are the core devices urgently needed to realise the wide application of terahertz technology. In this paper, a room-temperature terahertz detector based on the photothermoelectric effect is developed. Using tellurium (Te) nanowires as the channel material, and tilted-angle evaporation method is used to fabricate the channel with a length of less than one hundred nanometers, and the Te nanowires are doped by asymmetric metal to give asymmetric thermoelectric properties at both ends. Experimental results demonstrate that the device can achieve a responsivity of 54.63 V/W under 0.288 THz illumination, with a noise equivalent power of 33.5 pW/Hz1/2. and a response time of 71.1 μs, which realises a highly sensitive and rapid terahertz detection under room temperature conditions.

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  • 收稿日期:2025-02-10
  • 最后修改日期:2025-05-24
  • 录用日期:2025-05-28
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