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Your search keyword '"Pei Heng Wu"' showing total 13 results
Start Over Author "Pei Heng Wu" Journal chinese physics letters
13 results on '"Pei Heng Wu"'

1. Dielectric Properties of GaN in THz Frequencies

Author

He-Nan, Fang, primary, Rong, Zhang, additional, Bin, Liu, additional, Hai, Lu, additional, Jian-Ping, Ding, additional, Zi-Li, Xie, additional, Xiang-Qian, Xiu, additional, You-Dou, Zheng, additional, Ming-Wen, Xiao, additional, Cai-Hong, Zhang, additional, Jian, Chen, additional, and Pei-Heng, Wu, additional

Published
2010
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4. Noise Behaviour of a THz Superconducting Hot-Electron Bolometer Mixer

Author

Wen, Zhang, primary, Ning, Li, additional, Ling, Jiang, additional, Wei, Miao, additional, Zhen-Hui, Lin, additional, Qi-Jun, Yao, additional, Sheng-Cai, Shi, additional, Jian, Chen, additional, Pei-Heng, Wu, additional, Svechnikov, S. I, additional, Vachtomin, Yu. B, additional, Antipov, S. V, additional, Voronov, B. M, additional, and Gol'tsman, G. N, additional

Published
2007
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11. Terahertz Direct Detectors Based on Superconducting Hot Electron Bolometers with Microwave Biasing.

Author

Shou-Lu Jiang, Xian-Feng Li, Run-Feng Su, Xiao-Qing Jia, Xue-Cou Tu, Lin Kang, Biao-Bing Jin, Wei-Wei Xu, Jian Chen, and Pei-Heng Wu

Subjects
SUPERCONDUCTORS, NIOBIUM nitride, HOT carriers, BOLOMETERS, MICROWAVES
Abstract

Terahertz (THz) direct detectors based on superconducting niobium nitride (NbN) hot electron bolometers (HEBs) with microwave (MW) biasing are studied. The MW is used to bias the HEB to the optimum point and to readout the impedance changes caused by the incident THz signals. Compared with the thermal biasing method, this method would be more promising in large scale array with simple readout. The used NbN HEB has an excellent performance as heterodyne detector with the double sideband noise temperature (TN) of 403 K working at 4.2 K and 0.65 THz. As a result, the noise equivalent power of 1.5 pW/Hz1/2 and the response time of 64 ps are obtained for the direct detectors based on the NbN HEBs and working at 4.2 K and 0.65 THz. [ABSTRACT FROM AUTHOR]

Published
2017
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12. High-<iopmath latex="$ T_{\bf c}$">T<SUB>c</SUB></iopmath> Superconductor Detection Coils for a Magnetic Resonance System

Author

Lin, Kang, Pei-Heng, Wu, Jun, Pan, Wei-Xing, Cai, Sen-Zu, Yang, and Chun-Hai, Cao

Abstract

Considering that in a magnetic resonance system, if the detection coil contributes dominantly to the system noise, the performance of the whole system can certainly be improved by switching to a detection coil made of a high-temperature superconductor, and using YBa2Cu3O7 thin films on 25×25 mm2 LaAlO3 substrates, we have prepared two kinds of detection coils: single-coil and two-coil. Encouragingly, their quality factors are measured to be Q>2500 for two-coil (at 22.566 MHz and 77 K) and Q>5500 for single-coil (at 92.3 MHz and 77 K), respectively. Here, we describe the details of the design, fabrication and testing of the coils.

Published
2002

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