Polarization-Resolved THz Imaging With Orthogonal Heterostructure Backward Diode Detectors
Polarization-Resolved THz Imaging With Orthogonal Heterostructure Backward Diode Detectors
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DOI：
10.1109/tthz.2023.3242230
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发表时间：
2023-05
影响因子：
3.2
通讯作者：
Yu Shi;Yijing Deng;Peizhao Li;P. Fay;Lei Liu
中科院分区：
文献类型：
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作者：
Yu Shi;Yijing Deng;Peizhao Li;P. Fay;Lei Liu
在Terahertz（THZ）区域设计，制造和表征了完全集成的透镜耦合双极检测器与缩短的匹配网络和缩短的固定杆一起，以最大的功率转移模块可以简单地测量入射波的两个正交线性偏置组件，因此获得极化方向。整合的检测器。远程灵敏度，通行式成像和检测/身份应用程序。
A fully integrated lens-coupled dual-polarization detector for imaging was designed, fabricated, and characterized in the terahertz (THz) region. Two zero-bias heterostructure backward diodes were monolithically integrated into a planar dual-polarization annular-slot antenna. An impedance matching network consisting of an interdigitated dc block and shorted stubs was implemented for maximum power transfer. The fabricated chip was then mounted on an extended hemispherical silicon lens for high antenna efficiency. The performance of the integrated detector has been characterized at 200 GHz. The detector module can simultaneously measure the two orthogonal linear-polarized components of the incident THz waves, and hence obtain the polarization direction. On the basis of this polarimetric detection, polarization-resolved imaging of a Gaussian beam, as well as birefringent samples, was performed using the integrated detectors. The angular resolution of the polarization detection has been demonstrated to be as small as 3°. The single-pixel detector demonstrated here is amenable to array applications for THz focal-plane arrays that will have a significant impact on a wide range of remote sensing, through-barrier imaging, and detection/identification applications.