| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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THz Imaging Using a Quantum-Well Photodetector with Background Limited Performance |
| ZHOU Tao, ZHANG Rong, GUO Xu-Guang, TAN Zhi-Yong, CAO Jun-Cheng** |
Key Laboratory of Terahertz Solid-State Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050
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| Cite this article: |
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ZHOU Tao, ZHANG Rong, GUO Xu-Guang et al 2012 Chin. Phys. Lett. 29 104202 |
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Abstract Terahertz (THz) quantum well photodetectors (QWPs) are an extension of quantum well infrared photodetectors in the THz region. We construct an imaging system based on a THz QWP with a narrow response range from 3 THz to 6 THz. The peak responsivity of the THz QWP having background-limited performance is about 0.5 A/W, and the corresponding detectivity reaches 1011cm?Hz1/2/W at temperature of 4.2 K. We obtain the images of a concealed object by the imaging system and prove that THz QWPs have the potential for imaging applications.
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Received: 27 July 2012
Published: 01 October 2012
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| PACS: |
42.79.Pw
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(Imaging detectors and sensors)
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42.30.Wb
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(Image reconstruction; tomography)
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