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Author Kawamura, J.; Blundell, R.; Tong, C.-Y. E.; Papa, D. C.; Hunter, T. R.; Paine, S. N.; Patt, F.; Gol'tsman, G.; Cherednichenko, S.; Voronov, B.; Gershenzon, E.
Title Superconductive hot-electron-bolometer mixer receiver for 800-GHz operation Type Journal Article
Year 2000 Publication IEEE Trans. Microw. Theory Techn. Abbreviated Journal IEEE Trans. Microw. Theory Techn.
Volume (down) 48 Issue 4 Pages 683-689
Keywords NbN HEB mixers, LO power, local oscillator power, saturation, linearity, dynamic range
Abstract In this paper, we describe a superconductive hot-electron-bolometer mixer receiver designed to operate in the partially transmissive 350-μm atmospheric window. The receiver employs an NbN thin-film microbridge as the mixer element, in which the main cooling mechanism of the hot electrons is through electron-phonon interaction. At a local-oscillator frequency of 808 GHz, the measured double-sideband receiver noise temperature is TRX=970 K, across a 1-GHz intermediate-frequency bandwidth centered at 1.8 GHz. We have measured the linearity of the receiver and the amount of local-oscillator power incident on the mixer for optimal operation, which is PLO≈1 μW. This receiver was used in making observations as a facility instrument at the Heinrich Hertz Telescope, Mt. Graham, AZ, during the 1998-1999 winter observing season.
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Call Number RPLAB @ lobanovyury @ Serial 573
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Author Manus, M. K. Mc; Kash, J. A.; Steen, S. E.; Polonsky, S.; Tsang, J.C.; Knebel, D. R.; Huott, W.
Title PICA: Backside failure analysis of CMOS circuits using picosecond imaging circuit analysis Type Journal Article
Year 2000 Publication Microelectronics Reliability Abbreviated Journal Microelectronics Reliability
Volume (down) 40 Issue Pages 1353-1358
Keywords SSPD, CMOS testing
Abstract Normal operation of complementary metal-oxide semiconductor (CMOS) devices entails the emission of picosecond pulses of light, which can be used to diagnose circuit problems. The pulses that are observed from submicron sized field effect transistors (FETs) are synchronous with logic state switching. Picosecond Imaging Circuit Analysis (PICA), a new optical imaging technique combining imaging with timing, spatially resolves individual devices at the 0.5 micron level and switching events on a 10 picosecond timescale. PICA is used here for the diagnostics of failures on two VLSI microprocessors.
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Call Number Serial 1054
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Author Gundlach, K. H.; Schicke, M.
Title SIS and bolometer mixers for terahertz frequencies Type Journal Article
Year 2000 Publication Supercond. Sci. Technol Abbreviated Journal
Volume (down) 13 Issue Pages 181-187
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Call Number RPLAB @ s @ sis_Gundlach_2000 Serial 302
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Author Gerecht, E.; Musante, C.F.; Zhuang, Y.; Ji, M.; Yngvesson, K.S.; Goyette, T.; Waldman, J.
Title NbN hot electron bolometric mixer with intrinsic receiver noise temperature of less than five times the quantum noise limit Type Conference Article
Year 2000 Publication Proc. IMS Abbreviated Journal
Volume (down) 2 Issue Pages 1007-1010
Keywords HEB mixer
Abstract In recent years, improvements in device development and quasi-optical coupling techniques utilizing planar antennas have led to a significant achievement in low noise receivers for the edges of the submillimeter frequency regime. Hot electron bolometric (HEB) receivers made of thin superconducting films such as NbN have produced a viable option for instruments designed to measure the molecular spectra for astronomical applications as well as in remote sensing of the atmosphere in the THz regime. This paper describes an NbN HEB mixer with intrinsic DSB receiver noise temperature of at most five times the quantum noise limit at frequencies as high as 2.24 THz
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Call Number Serial 477
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Author Tong, C.-Y. Edward; Kawamura, Jonathan; Todd, R. Hunter; Papa, D. Cosmo; Blundell, Raymond.; Smith, Michael; Patt, Ferdinand; Gol'tsman, Gregory; Gershenzon, Eugene
Title Successful operation of a 1 THz NbN hot-electron bolometer receiver Type Conference Article
Year 2000 Publication Proc. 11th Int. Symp. Space Terahertz Technol. Abbreviated Journal Proc. 11th Int. Symp. Space Terahertz Technol.
Volume (down) Issue Pages 49-59
Keywords NbN HEB mixers, applications
Abstract A phonon-cooled NbN superconductive hot-electron bolometer receiver covering the frequency range 0.8-1.04 THz has successfully been used for astronomical observation at the Sub-Millimeter Telescope Observatory on Mount Graham, Arizona. This waveguide heterodyne receiver is a modified version of our fixed-tuned 800 GHz HEB receiver to allow for operation beyond 1 THz. The measured noise temperature of this receiver is about 1250 K at 0.81 THz, 560 K at 0.84 THz, and 1600 K at 1.035 THz. It has a 1 GHz wide IF bandwidth, centered at 1.8 GHz. This receiver has recently been used to detect the CO (9-8) molecular line emission at 1.037 THz in the Orion nebula. This is the first time a ground-based heterodyne receiver has been used to detect a celestial source above 1 THz.
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Call Number Serial 303
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