Noise temperature and beam pattern of an NbN hot electron bolometer mixer at 5.25 THz
文献类型：期刊论文
| 作者 | 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
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| 刊名 | JOURNAL OF APPLIED PHYSICS
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| 出版日期 | 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] |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Physics |
| 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 |
| 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‘ . |
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来源：紫金山天文台
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