Research Progress on Terahertz Quantum-Well Photodetector and Its Application

Frontiers in Physics

Dixiang Shao¹  Liangliang Gu¹  Zhanglong Fu¹  Wenjian Wan¹  Zhiyong Tan²  Juncheng Cao²  Chang Wang²  Fucheng Qiu² 

[1] Shanghai, China;Shanghai, China;Beijing, China;

关键词: terahertz detection;    terahertz imaging;    terahertz communication;    terahertz;    terahertz quantum-well photodetector;   

DOI  :  10.3389/fphy.2021.751018

来源: Frontiers

【 摘 要 】

Compared with other typical terahertz (THz) detectors, the quantum-well photodetector (QWP) has the advantages of high detection sensitivity, fast response, mature fabrication, small size, and easy integration. Therefore, it is suitable for high-speed detection and imaging applications at the THz band. Researchers, both domestic and overseas, have systematically studied material design and device performance of the THz QWP. The design of the device is such that the peak frequency error is within 8%, the maximum peak responsibility is 5.5 A/W, the fastest response speed is 6.2 GHz, the best noise equivalent power is ∼10−13 W/Hz0.5, and the spectrum range is 2.5–6.5 THz. In this article, firstly the basic principles and theoretical calculations of the THz QWP are described, and then the research progress of the THz QWP in our research group at imaging and communication is reviewed, which looks forward to its future development.

【 授权许可】

CC BY