Noise temperature and beam pattern of an NbN hot electron bolometer mixer at 5.25 THz

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	Noise temperature and beam pattern of an NbN hot electron bolometer mixer at 5.25 THz
	Zhang, W.1,2 ; Khosropanah, P.1; Gao, J. R.1,3; Bansal, T.1,3; Klapwijk, T. M.3; Miao, W.2; Shi, S. C.2
刊名	JOURNAL OF APPLIED PHYSICS
	2010-11-01
卷号	108 期号:9 页码:093102‘
关键词	QUANTUM CASCADE LASER INTEGRATED LENS ANTENNAS HETERODYNE RECEIVER PHASE-LOCKING LOCAL OSCILLATOR SPECTROSCOPY PERFORMANCE TELESCOPE
ISSN号	0021-8979
英文摘要	We report the measured sensitivities of a superconducting NbN hot electron bolometer (HEB) heterodyne receiver at 5.25 THz. Terahertz (THz) radiation is quasioptically coupled to a HEB mixer with a lens and a spiral antenna. Using a measurement setup with black body calibration sources and a beam splitter in vacuo, and an antireflection coated Si lens, we obtained a double sideband (DSB) receiver noise temperature (T(rec)(DSB)) of 1150 K, which is nine times hv/2k, where h is the Planck constant, v the frequency, and k the Boltzmann constant. In addition, the measured far field beam patterns of the integrated lens antenna show nearly collimated beams from 2.5 to 5.3 THz that allow reliable measurement of T(rec)(DSB) using the vacuum setup. Our experimental results in combination with an antenna-to-bolometer coupling simulation suggest that the HEB mixer can work well at least up to 6 THz, making it suitable for next generation of high-resolution spectroscopic space telescopes and, in particular, for the detection of the neutral atomic oxygen line at 4.7 THz. (C) 2010 American Institute of Physics. [doi:10.1063/1.3503279]
学科主题	Physics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Physics, Applied
研究领域[WOS]	Physics
关键词[WOS]	QUANTUM CASCADE LASER ; INTEGRATED LENS ANTENNAS ; HETERODYNE RECEIVER ; PHASE-LOCKING ; LOCAL OSCILLATOR ; SPECTROSCOPY ; PERFORMANCE ; TELESCOPE
收录类别	SCI
语种	英语
WOS记录号	WOS:000284270900003
公开日期	2011-11-23
内容类型	期刊论文
源URL	[http://159.226.72.40/handle/332002/987]
专题	紫金山天文台_毫米波和亚毫米波技术实验室
作者单位	1.Univ Groningen, SRON Netherlands Inst Space Res, NL-9747 AD Groningen, Netherlands 2.Chinese Acad Sci, Natl Astron Observ China, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China 3.Delft Univ Technol, Kavli Inst Nanosci, NL-2628 CJ Delft, Netherlands
推荐引用方式 GB/T 7714	Zhang, W.,Khosropanah, P.,Gao, J. R.,et al. Noise temperature and beam pattern of an NbN hot electron bolometer mixer at 5.25 THz[J]. JOURNAL OF APPLIED PHYSICS,2010,108(9):093102‘ .
APA	Zhang, W..,Khosropanah, P..,Gao, J. R..,Bansal, T..,Klapwijk, T. M..,...&Shi, S. C..(2010).Noise temperature and beam pattern of an NbN hot electron bolometer mixer at 5.25 THz.JOURNAL OF APPLIED PHYSICS,108(9),093102‘ .
MLA	Zhang, W.,et al."Noise temperature and beam pattern of an NbN hot electron bolometer mixer at 5.25 THz".JOURNAL OF APPLIED PHYSICS 108.9(2010):093102‘ .