We report the design, fabrication, and prototype demonstration of a 200-GHz polarization-resolved quasi-optical detector employing monolithically integrated zero-bias heterostructure backward diodes (HBDs). In this design, polarization resolution is achieved by orthogonally integrating the detectors with a planar dual-polarization annular-slot antenna. The detector chip was fabricated and mounted on an extended hemispherical Si lens to enhance antenna efficiency in the millimeter-wave to terahertz region. The responsivity and radiation patterns of the detector were characterized experimentally; good agreement with theoretical calculations was obtained. By measuring the outputs of two orthogonal HBDs as a function of the polarization angle of the incident wave, the planar detector detects intensity and resolves polarization. On the basis of the polarimetric measurement, we further demonstrate the polarization imaging capability of the proposed detector by using it as an imaging system. The detector is promising for developing terahertz polarimetric sensors and imaging arrays in chemical sensing, biomedical imaging, and radio astronomy applications.

中文翻译：

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使用零偏置异质结构后向二极管的 200 GHz 全集成偏振分辨准光学探测器


我们报告了采用单片集成零偏置异质结构反向二极管 (HBD) 的 200 GHz 偏振分辨准光学探测器的设计、制造和原型演示。在该设计中，偏振分辨率是通过将探测器与平面双偏振环形槽天线正交集成来实现的。探测器芯片被制造并安装在扩展的半球形硅透镜上，以提高毫米波到太赫兹区域的天线效率。通过实验表征了探测器的响应率和辐射图；与理论计算得到了很好的吻合。通过测量两个正交 HBD 的输出作为入射波偏振角的函数，平面探测器可以检测强度并解析偏振。在偏振测量的基础上，我们将所提出的探测器用作成像系统，进一步证明了其偏振成像能力。该探测器有望在化学传感、生物医学成像和射电天文学应用中开发太赫兹偏振传感器和成像阵列。