激子绝缘体为室温超灵敏的太赫兹可见探测提供动力

IF 20.6 Q1 OPTICS

Light-Science & Applications Pub Date : 2025-04-02 DOI:10.1038/s41377-025-01828-8

Yi Wu, Wenjie Deng, Yongzhe Zhang

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引用次数: 0

摘要

相变引起材料电学和光子特性的显著变化。利用材料相变的超灵敏光电探测器可以在相变温度附近实现。基于Ta2NiSe5（一种室温激子绝缘体相变材料）的光电探测器在可见光到太赫兹频率范围内表现出优异的性能。具体来说，在太赫兹范围内，电子带宽为360 kHz，比探测率（D*）达到5.3 × 1011 cm·Hz1/2·W−1。Ta2NiSe5/WS2的范德华异质结构进一步提高了性能。

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Excitonic insulator powers room-temperature ultra-sensitive visible to terahertz detection

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Excitonic insulator powers room-temperature ultra-sensitive visible to terahertz detection

Phase transitions induce significant changes in the electrical and photonic properties of materials. Ultra-sensitive photodetectors leveraging material phase transitions can be realized near the transition temperature. Photodetectors based on Ta₂NiSe₅, a room-temperature excitonic insulator phase transition material, exhibit exceptional performance from visible to terahertz frequencies. Specifically, in the terahertz range, the electronic bandwidth is 360 kHz, and the specific detectivity (D*) reaches 5.3 × 10¹¹ cm·Hz^1/2·W⁻¹. The van der Waals heterostructure of Ta₂NiSe₅/WS₂ further enhances performance.

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来源期刊

Light-Science & Applications 数理科学, 物理学I, 光学, 凝聚态物性 II ：电子结构、电学、磁学和光学性质, 无机非金属材料, 无机非金属类光电信息与功能材料, 工程与材料, 信息科学, 光学和光电子学, 光学和光电子材料, 非线性光学与量子光学

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0.00%

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803

审稿时长

2.1 months