High-performance terahertz wave detectors at room temperature are still urgently required for a wide range of applications. The available technologies, however, are plagued by low sensitivity, narrow spectral bandwidth, complicated structure, and high noise equivalent power (NEP). Here, we have demonstrated a Weyl semimetal surface plasmon-enhanced high-performance terahertz wave detectors which are based on microdisk array deposited WTe2 nanofilm epitaxially grown on GaN substrate for room temperature operation. With the microdisk array combined the WTe2 layer, strong terahertz wave surface plasmon polaritons can be generated at the WTe2–air interfaces, which results in significant improvement in detecting performance. For the 40 μm diameter microdisk array, a detectivity (D *) of 5.52 × 1012 cm Hz1/2 pW−1 at 0.1 THz is achieved at room temperature. In addition, the responsivity (R A) of 8.78 A W−1 is also obtained. Such high-performance millimeter and terahertz wave photodetectors are useful for wide applications such as high capacity communications, walk-through security, biological diagnosis, spectroscopy, and remote sensing.

中文翻译：

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基于微盘阵列的外尔半金属纳米薄膜太赫兹探测器

室温下的高性能太赫兹波探测器仍然迫切需要广泛的应用。然而，现有技术存在灵敏度低、光谱带宽窄、结构复杂、噪声等效功率（NEP）高等问题。在这里，我们展示了一种基于微盘阵列沉积 WTe 的 Weyl 半金属表面等离子体增强的高性能太赫兹波探测器2在 GaN 衬底上外延生长的纳米薄膜，用于室温操作。随着微磁盘阵列结合 WTe2层，强太赫兹波表面等离子体激元可以在WTe产生2– 空中接口，这会显着提高检测性能。对于 40 μm 直径的微盘阵列，检测率 (D *) 的 5.52 × 1012厘米赫兹1/2功率-1在室温下达到 0.1 THz。此外，响应度（R 一个) 的 8.78 AW-1也获得。这种高性能毫米波和太赫兹波光电探测器可用于广泛的应用，例如高容量通信、步入式安全、生物诊断、光谱学和遥感。