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题名: 3.4 THz heterodyne receiver using a hot electron bolometer and a distributed feedback quantum cascade laser
作者: Khosropanah, P.1; Zhang Wen(张文)1, 2; Hovenier, J. N.3; Gao, J. R.1, 3; Klapwijk, T. M.3; Amanti, M. I.4; Scalari, G.4; Faist, J.4
刊名: JOURNAL OF APPLIED PHYSICS
出版日期: 2008-12-01
卷号: 104, 期号:11
DOI: 10.1063/1.3032354
文章类型: Article
英文摘要: We report a heterodyne receiver using a superconducting NbN hot electron bolometer (HEB) integrated with a tight winding spiral antenna as mixer and a distributed feedback (DFB) terahertz quantum cascade laser (QCL) operating at 3.42 THz as local oscillator. The aim is to demonstrate the readiness of both devices for the detection of OH lines at 3.5 THz in a real instrument. We show that the improved single-spot beam of the terahertz QCL can easily pump the HEB mixer. We measured a double sideband receiver noise temperature of 2100 K at the optimum local oscillator power of 290 nW. This noise temperature can be further reduced to 1100 K if we correct the loss due to the use of an uncoated lens, and the losses of the window and the air. Therefore, the combination of a HEB and such a DFB QCL can in principle be used to detect an OH line at 3.5 THz. However, a high input power of several watts, which is needed to operate the QCL in a liquid-helium cryostat, poses a big challenge to the receiver stability. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.3032354]
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Physics, Applied
研究领域[WOS]: Physics
关键词[WOS]: LOCAL OSCILLATOR ; OPERATION ; SOUNDER ; MODE
收录类别: SCI
语种: 英语
WOS记录号: WOS:000262364000007
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/15886
Appears in Collections:毫米波和亚毫米波技术实验室_期刊论文

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作者单位: 1.Univ Groningen, SRON Netherlands Inst Space Res, NL-9747 AD Groningen, Netherlands
2.Chinese Acad Sci, NAOC, PMO, Jiangsu 210008, Peoples R China
3.Delft Univ Technol, Kavli Inst Nanosci, NL-2628 CJ Delft, Netherlands
4.ETH, Inst Quantum Elect, CH-8096 Zurich, Switzerland
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