学术
Noise Behaviour of a THz Superconducting Hot-Electron Bolometer Mixer
张文[1,3] 李宁[1] 蒋玲[1] 缪巍[1] 林镇辉[1] 姚骑均[1] 史生才[1] 陈健[2] 吴培亨[2] S．I．Svechnikov[3] Yu. B. Vachtomin[3] S. V. Antipov[3] B. M. voronov[3] G. N. Gol＇tsman[3]
[1]Purple Mountain Observatory, National Astronomical Observatories, Chinese Academy of Sciences, Nanjing 210008 [2]Department of Electronic Science and Engineering, Nanjing University, Nanjing 210093 [3]Department of Physics, Moscow State Pedagogical University, Moscow 119992, Russia
文章出处:
《中国物理快报：英文版》-2007年24卷6期 -1778-1781页
Noise Behaviour of a THz Superconducting Hot-Electron Bolometer Mixer
ZHANG Wen, LI Ning, JIANG Ling, MIAO Wei, LIN Zhen-Hui, YAO Qi-Jun, SHI Sheng-Cai, CHEN Jian, WU Pei-Heng, S. I. Svechnikov, Yu. B. Vachtomin, S. V. Antipov, B. M. Voronov, G. N. Gol＇tsman （1 Purple Mountain Observatory, National Astronomical Observatories, Chinese Academy of Sciences, Nanjing 2100082Department of Electronic Science and Engineering, Nanjing University, Nanjing 210093 3Department of Physics, Moscow State Pedagogical University, Moscow 119992, Russia）
Abstract:
A quasi-optical superconducting NbN hot-electron bolometer （HEB） mixer is measured in the frequency range of 0.5-2.5 THz for understanding of the frequency dependence of noise temperature of THz coherent detectors. It has been found that noise temperature increasing with frequency is mainly due to the coupling loss between the quasioptical planar antenna and the superconducting HEB bridge when taking account of non-uniform distribution of high-frequency current. With the coupling loss corrected, the superconducting HEB mixer demonstrates a noise temperature nearly independent of frequency.[著者文摘]
基金资助:
Supported by the National Natural Science Foundation of China under Grant Nos 10390163 and 10211120645, the Chinese Academy of Sciences under Grant No K3CX2-SW-T2, and the Russian Foundation for Basic Research under Grant No 04-02-39016.
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