基于MIR热电堆的准商用太赫兹探测器
A quasi-commercial Terahertz detector based on MIR thermopiles
摘要：
将热电堆与低功耗运算放大器集成是获得高性能紧凑型太赫兹功率探测器的一种有效且经济的方法。在这里，我们提出了这样一个集成的检测器的发展，包括基本的积木，最终实现和相关的表征。探测器的响应度和带宽的测量在一个标准的太赫兹连续波设置组成的封闭循环氦低温恒温器和量子级联激光器（QCL）。预测结果与实测数据进行了比较，显示出良好的一致性。在实际使用中，现有Golay单元THz探测器在灵敏度和NEP图方面的优势消失，这是由于由高达100 mW的入射功率的热电堆的线性操作提供的动态范围的巨大增加，同时提供低于1 nW/sqrt（Hz）的NEP和6.8 Hz的-3dB带宽。
英文摘要：
Integrating a thermopile with a low power operational amplifier is an effective and cost-efficient approach to obtain a high performance compact Terahertz power detector. Here we present the development of such an integrated detector, including the fundamental building blocks, the final realization and related characterization. The responsivity and bandwidth of the detector are measured in a standard THz CW setup consisting of a closed cycle helium cryostat and a Quantum Cascade Laser (QCL). The predicted results are compared with measured data, showing a good agreement. Advantages of existing Golay cell THz detectors in both sensitivity and NEP figure vanish, in practical use, due to the enormous increment in dynamic range provided by the linear operation of the thermopile up to 100 mW of incident power while offering a NEP below 1nW/sqrt(Hz) and a -3dB bandwidth of 6,8 Hz.
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