We fabricate germanium-based blocked-impurity-band (BIB) terahertz detectors with the same planar structure but different structural parameters. The photoresponse waveband range is about 40-130 μm. The best detectivity of these detectors reaches as high as 1.3 × 1013 Jones at 2.6 V and 4 K. The impact of the structural parameters, including the length of the absorbing layer and blocking layer (BL) on the performance of detectors, is investigated. It is concluded that there is an optimum BL length, enabling the fabricated BIB detectors to achieve the highest sensitivity. This work highlights the importance of the optimized structural parameters and their influence on the performance of the detectors.

中文翻译：

---

结构参数对平面结构太赫兹阻挡杂质带探测器光响应的影响


我们制造了具有相同平面结构但结构参数不同的基于锗的阻挡杂质带（BIB）太赫兹探测器。光响应波段范围约为40-130μm。这些探测器在2.6 V和4 K下的最佳探测率高达1.3 × 1013 Jones。研究了结构参数（包括吸收层和阻挡层（BL）的长度）对探测器性能的影响。结论是存在一个最佳的 BL 长度，使制造的 BIB 探测器能够达到最高的灵敏度。这项工作强调了优化结构参数的重要性及其对探测器性能的影响。