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 a...
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2017
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oai:doaj.org-article:19547af45a8043f8bfa55468b9c7d09b2021-12-02T11:52:25Z6.2-GHz modulated terahertz light detection using fast terahertz quantum well photodetectors10.1038/s41598-017-03787-62045-2322https://doaj.org/article/19547af45a8043f8bfa55468b9c7d09b2017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03787-6https://doaj.org/toc/2045-2322Abstract 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-Pérot 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 be used for optically characterizing the frequency stability of terahertz quantum cascade lasers, heterodyne detections and photomixing applications.Hua LiWen-Jian WanZhi-Yong TanZhang-Long FuHai-Xia WangTao ZhouZi-Ping LiChang WangXu-Guang GuoJun-Cheng CaoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017) |
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Medicine R Science Q |
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Medicine R Science Q Hua Li Wen-Jian Wan Zhi-Yong Tan Zhang-Long Fu Hai-Xia Wang Tao Zhou Zi-Ping Li Chang Wang Xu-Guang Guo Jun-Cheng Cao 6.2-GHz modulated terahertz light detection using fast terahertz quantum well photodetectors |
| description |
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-Pérot 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 be used for optically characterizing the frequency stability of terahertz quantum cascade lasers, heterodyne detections and photomixing applications. |
| format |
article |
| author |
Hua Li Wen-Jian Wan Zhi-Yong Tan Zhang-Long Fu Hai-Xia Wang Tao Zhou Zi-Ping Li Chang Wang Xu-Guang Guo Jun-Cheng Cao |
| author_facet |
Hua Li Wen-Jian Wan Zhi-Yong Tan Zhang-Long Fu Hai-Xia Wang Tao Zhou Zi-Ping Li Chang Wang Xu-Guang Guo Jun-Cheng Cao |
| author_sort |
Hua Li |
| title |
6.2-GHz modulated terahertz light detection using fast terahertz quantum well photodetectors |
| title_short |
6.2-GHz modulated terahertz light detection using fast terahertz quantum well photodetectors |
| title_full |
6.2-GHz modulated terahertz light detection using fast terahertz quantum well photodetectors |
| title_fullStr |
6.2-GHz modulated terahertz light detection using fast terahertz quantum well photodetectors |
| title_full_unstemmed |
6.2-GHz modulated terahertz light detection using fast terahertz quantum well photodetectors |
| title_sort |
6.2-ghz modulated terahertz light detection using fast terahertz quantum well photodetectors |
| publisher |
Nature Portfolio |
| publishDate |
2017 |
| url |
https://doaj.org/article/19547af45a8043f8bfa55468b9c7d09b |
| work_keys_str_mv |
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