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Author Maas, S.
Title SIS mixers Type Conference Article
Year 1993 Publication Artech House Abbreviated Journal
Volume Issue Pages 338-340
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Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Boston, MA Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Medium
Area Expedition Conference
Notes (up) Approved no
Call Number Serial 249
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Author Tonguz, O.K.; Hwang, B.
Title Noise performance of AFC loops in optical heterodyne receivers Type Conference Article
Year 1993 Publication Proc. Lasers and Electro-Optics Society Annual Meeting Abbreviated Journal Proc. LEOS
Volume Issue Pages 361-362
Keywords optical mixing
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication San Jose, CA, USA Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
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ISSN ISBN Medium
Area Expedition Conference
Notes (up) Approved no
Call Number Serial 510
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Author Prober, D. E.
Title Superconducting terahertz mixer using a transition-edge microbolometer Type Journal Article
Year 1993 Publication Department of Applied Physics and Physics, Yale University, New Haven, Connecticut 06520-2157 Abbreviated Journal
Volume Issue Pages 2119-2121
Keywords
Abstract We present a new device concept for a mixer element for THz frequencies. This uses a superconducting transition-edge microbridge biased at the center of its superconducting transition near 4.2 K. It is fed from an antenna or waveguide structure. Power from a local oscillator and a rf signal produce a temperature and resulting resistance variation at the difference frequency. The new aspect is the use of a very short bridge in which rapid ( < 0.1 ns) outdiffision of hot electrons occurs. This gives large intermediate frequency (if) response. The mixer offers ~4 GHz if bandwidth, z 80 Cl rf resistive impedance, good match to the if amplifier, and requires only l-20 nW of local oscillator power. The upper rf frequency is determined by antenna or waveguide properties. Predicted mixer conversion efficiency is l/8, and predicted double-sideband receiver noise temperatures are 260 and 90 K for transition widths of 0.1 and 0.5 T, respectively.
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Notes (up) Approved no
Call Number RPLAB @ atomics90 @ Serial 955
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Author Ekstrom, H.; Karasik, B.; Weikle, R.; Yngvesson, K. S.; Gol’tsman, G.; Kollberg, E.; Gershenzon, E.
Title Mixers using superconducting Nb films in the resistive state Type Conference Article
Year 1993 Publication 23rd European Microwave Conf. Abbreviated Journal 23rd European Microwave Conf.
Volume Issue Pages 787-789
Keywords Nb HEB mixers
Abstract The mixing of 20 GHz radiation in a Nb superconducting film in the resistive state was studied. The experiment gave evidence of electron-heating to be the origin of the non-linear phenomenon. The requirements on the operation mode and on the film parameters in order to obtain small conversion losses or even gain are determined. Our measurements indicate a conversion loss of about 6-8 dB. The hot-electron bolometer is considered to be very promising for use in heterodyne receivers in a wide frequency range from microwaves to terahertz frequencies.
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Corporate Author Thesis
Publisher Place of Publication Editor
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Area Expedition Conference
Notes (up) Approved no
Call Number Serial 1651
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Author Gol’tsman, G. N.; Gershenzon, E. M.
Title High speed hot-electron superconducting bolometer Type Conference Article
Year 1993 Publication Proc. SPIE Abbreviated Journal Proc. SPIE
Volume 2104 Issue Pages 181-182
Keywords NbN HEb, Nb, Al
Abstract Physical limitation of response time of a superconducting bolometer as well as the nature of non-equilibrium detection of radiation have been investigated for Al, Nb and NbN thin films in spectral range from submillimeter to near-infraredwavelengths [1,2]. In the case of ideal heat removal from the film with the f_‘. 100A thickness the detection mechanism is an electron heating effect that is not selective to radiation wavelength in a very broad range. The response time ofan electron heating bolometer is determined by an electron-phonon interaction time. This time is of about 10 ns, 0.5 ns and 20 ps for Al, Nb, and NbN correspondingly near the critical temperature of the superconducting film. Thesensitive area of the bolometer consists of a number of narrow strips (with awidth of 1µm) connected in parallel to contact pads; these pads together witha sapphire substrate and a ground plate represent the microstrip transmissionline with an impedance of 50 Q.
Address
Corporate Author Thesis
Publisher SPIE Place of Publication Editor Birch, J.R.; Parker, T.J.
Language Summary Language Original Title
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Area Expedition Conference 18th International Conference on Infrared and Millimeter Waves
Notes (up) Approved no
Call Number Serial 1652
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