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Terahertz direct-detection behavior of niobium nitride superconducting tunnel junctions above liquid helium temperature
Wang, Zheng1,2; Liu, Dong1,2; Li, Shao-liang1,2; Li, Jing1,2; Shi, Sheng-Cai1,2
2014-07-01
Source PublicationSUPERCONDUCTOR SCIENCE & TECHNOLOGY
ISSN0953-2048
Volume27Issue:7Pages:0
AbstractNiobium nitride (NbN) superconducting tunnel junctions (STJs) have an energy gap nearly double that of niobium STJs, making them potential sensitive detectors that operate at higher frequencies and temperatures. In this paper, we investigate the direct-detection behavior (i.e. the spectral response, current responsivity, noise characteristics, and noise equivalent power (NEP)) of a 500 GHz NbN STJ detector at temperatures from approximately 5 to 9 K. The detector shows an uncorrected NEP of 3.8 x 10(-13) W/root Hz around 5 K and 1.5 x 10(-12) W/root Hz at 9 K. Its performance can be further improved by adopting a cryogenically cooled readout circuit and fabricating the device with a wiring layer of higher critical-transition temperatures.
KeywordTerahertz Direct Detection Niobium Nitride Superconducting Tunneling Junction Liquid Helium
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0953-2048/27/7/075003
WOS KeywordMILLIMETER ; MICROWAVE ; FUTURE ; ARRAYS ; MIXERS
URL查看原文
Indexed BySCI
Language英语
WOS Research AreaPhysics
WOS SubjectPhysics, Applied ; Physics, Condensed Matter
WOS IDWOS:000338536400006
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/10580
Collection毫米波和亚毫米波技术实验室
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Millimeter & Submillimeter Wave Lab, Nanjing 210008, Jiangsu, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Wang, Zheng,Liu, Dong,Li, Shao-liang,et al. Terahertz direct-detection behavior of niobium nitride superconducting tunnel junctions above liquid helium temperature[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY,2014,27(7):0.
APA Wang, Zheng,Liu, Dong,Li, Shao-liang,Li, Jing,&Shi, Sheng-Cai.(2014).Terahertz direct-detection behavior of niobium nitride superconducting tunnel junctions above liquid helium temperature.SUPERCONDUCTOR SCIENCE & TECHNOLOGY,27(7),0.
MLA Wang, Zheng,et al."Terahertz direct-detection behavior of niobium nitride superconducting tunnel junctions above liquid helium temperature".SUPERCONDUCTOR SCIENCE & TECHNOLOGY 27.7(2014):0.
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