A MM-wave radiometer with planar Nb/a-Si/Nb Josephson junction

A report is presented on an investigation of the electrical and detection properties of thin-film step-edge submicron Nb/a-Si/Nb Josephson junctions for use as a detector in radioastronomical radiometers. These junctions are stable, thermally recyclable junctions with nonhysteretic I-V characteristi...

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Veröffentlicht in:	IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) 1991-03, Vol.27 (2), p.2468-2471
Hauptverfasser:	Kulikov, V.A., Matveets, L.V., Gudkov, A.L., Laptev, V.N., Makhov, V.I.
Format:	Artikel
Sprache:	eng
Schlagworte:	440101 - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments 661300 - Other Aspects of Physical Science- (1992-) 665412 - Superconducting Devices- (1992-) Applied sciences ASTRONOMY Capacitance CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY Detectors ELECTRICAL PROPERTIES Electrodes Electronics ELEMENTS Exact sciences and technology Fabrication FREQUENCY MODULATION INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY JOSEPHSON JUNCTIONS JUNCTIONS MEASURING INSTRUMENTS METALS MODULATION NIOBIUM PHYSICAL PROPERTIES RADIATION DETECTORS RADIOASTRONOMY RADIOMETERS Radiometry Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices SEMIMETALS SENSITIVITY SILICON Substrates Superconducting devices SUPERCONDUCTING JUNCTIONS THIN FILMS TRANSITION ELEMENTS Voltage Wideband
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Zusammenfassung:	A report is presented on an investigation of the electrical and detection properties of thin-film step-edge submicron Nb/a-Si/Nb Josephson junctions for use as a detector in radioastronomical radiometers. These junctions are stable, thermally recyclable junctions with nonhysteretic I-V characteristics, R/sub n/=(20-200) Omega and j/sub c/ approximately 10/sup 5/ A/cm. A wideband modulation radiometer for the 4-mm-wavelength range with a Nb/a-Si/Nb Josephson junction has been developed. The best fluctuation sensitivity has been achieved at 0.007 K for a 1-s. integration time.
ISSN:	0018-9464 1941-0069
DOI:	10.1109/20.133719