Broadband response is pursued in both infrared (IR) and terahertz (THz) detection technologies, which find their applications in both terrestrial and astronomical realms. Herein, we report an ultrabroadband and multiband IR/THz detector based on blocked-impurity-band detecting principle. The detectors are prepared by implanting phosphorus into germanium (Ge:P), where photoresponses with a P impurity band, a self-interstitial defect band, and a vacancy-P (V-P) pair defect band are realized simultaneously. The response spectra of the detectors show ultrabroad and dual response bands in a range of 3–28 μm (IR band) and 40–165 μm (THz band), respectively. Additionally, a tiny mid-IR (MIR) band within 3–4.2 μm is embedded in the IR band. The THz band arises from the P impurity band, whereas the IR and the MIR bands are ascribed to the two defect bands. At 150 mV and 4.5 K, the peak detectivities of the three bands are obtained as $2.9\times {10}^{12}$ Jones (at 3.9 μm), $6.8\times {10}^{12}$ Jones (at 16.3 μm), and $9.9\times {10}^{12}$ Jones (at 116.5 μm), respectively. The impressive coverage and sensitivity of the detectors are promising for applications in IR and THz detection technologies.

中文翻译：

---

具有高灵敏度的超宽带和多波段红外/太赫兹光电探测器

红外 (IR) 和太赫兹 (THz) 检测技术都在追求宽带响应，它们在陆地和天文领域都有应用。在此，我们报告了一种基于阻塞杂质带检测原理的超宽带和多频段 IR/THz 检测器。通过将磷注入锗 (Ge:P) 来制备探测器，其中同时实现了具有 P 杂质带、自填隙缺陷带和空位-P (VP) 对缺陷带的光响应。探测器的响应光谱分别显示了 3-28 μm（红外波段）和 40-165 μm（太赫兹波段）范围内的超宽和双响应波段。此外，在 3-4.2 μm 范围内的微小中红外 (MIR) 波段嵌入在红外波段中。THz 波段来自 P 杂质波段，而 IR 和 MIR 波段归因于两个缺陷波段。$2.9\times {10}^{12}$ 琼斯（3.9 微米）， $6.8\times {10}^{12}$ 琼斯（16.3 微米），和 $9.9\times {10}^{12}$琼斯（116.5 微米），分别。探测器令人印象深刻的覆盖范围和灵敏度在红外和太赫兹探测技术中的应用前景广阔。