6.2-GHz modulated terahertz light detection using fast terahertz quantum well photodetectors
Abstract
The fast detection of terahertz radiation is of great importance for various applications such as fast imaging, high speed communications, and spectroscopy. Most commercial products capable of sensitively responding the terahertz radiation are thermal detectors, i.e., pyroelectric sensors and bolometers. This class of terahertz detectors is normally characterized by low modulation frequency (dozens or hundreds of Hz). Here we demonstrate the first fast semiconductor-based terahertz quantum well photodetectors by carefully designing the device structure and microwave transmission line for high frequency signal extraction. Modulation response bandwidth of gigahertz level is obtained. As an example, the 6.2-GHz modulated terahertz light emitted from a Fabry-P\'{e}rot terahertz quantum cascade laser is successfully detected using the fast terahertz quantum well photodetector. In addition to the fast terahertz detection, the technique presented in this work can also facilitate the frequency stability or phase noise characterizations for terahertz quantum cascade lasers.
Keywords
Cite
@article{arxiv.1705.03182,
title = {6.2-GHz modulated terahertz light detection using fast terahertz quantum well photodetectors},
author = {Hua Li and Wen-Jian Wan and Zhi-Yong Tan and Zhang-Long Fu and Hai-Xia Wang and Tao Zhou and Zi-Ping Li and Chang Wang and Xu-Guang Guo and Jun-Cheng Cao},
journal= {arXiv preprint arXiv:1705.03182},
year = {2017}
}
Comments
12 pages, 4 figures. Scientific Reports, accepted for publication