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Baselmans, J. J. A.; Baryshev, A.; Reker, S. F.; Hajenius, M.; Gao, J. R.; Klapwijk, T. M.; Vahtomin, Yu.; Maslennikov, S.; Antipov, S.; Voronov, B.; Gol'tsman, G. |
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Title |
Direct detection effect in small volume hot electron bolometer mixers |
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Journal Article |
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2005 |
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Appl. Phys. Lett. |
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Appl. Phys. Lett. |
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86 |
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16 |
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163503 (1 to 3) |
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Keywords |
HEB, mixer, direct detection effect |
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Abstract |
We measure the direct detection effect in a small volume (0.15μm×1μm×3.5nm)(0.15μm×1μm×3.5nm) quasioptical NbN phonon cooled hot electronbolometermixer at 1.6THz1.6THz. We find that the small signal sensitivity of the receiver is underestimated by 35% due to the direct detection effect and that the optimal operating point is shifted to higher bias voltages when using calibration loads of 300K300K and 77K77K. Using a 200GHz200GHzbandpass filter at 4.2K4.2K the direct detection effect virtually disappears. This has important implications for the calibration procedure of these receivers in real telescope systems. |
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377 |
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Finkel, M. I.; Maslennikov, S. N.; Gol'tsman, G. N. |
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Title |
Terahertz heterodyne receivers based on superconductive hot-electron bolometer mixers |
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Journal Article |
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2005 |
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Radiophys. Quant. Electron. |
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Radiophys. Quant. Electron. |
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48 |
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10-11 |
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859-864 |
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HEB, applications |
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We consider recent results in development of hot-electron bolometer mixers. Special attention is paid to optimization of the contacts between the antenna and the active area of a superconducting film. An important result in the study of the parasitic effect of direct detection is obtained during the measurement of the noise temperatures by the hot/cold load method. The latest results of studies of the waveguide hot-electron bolometer mixers and their successful practical applications are considered. Progress in development of high-frequency (over 1.3 THz) heterodyne receivers for several important international projects is discussed and new submillimeter radio astronomy projects ESPRIT and SAFIR are described. |
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0033-8443 |
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381 |
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Single aperture far-infrared observatory |
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2005 |
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RPLAB @ s @ safir_proj |
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379 |
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Финкель, М. И.; Масленников, С. Н.; Гольцман, Г. Н. |
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Супергетеродинные терагерцовые приёмники со сверхпроводниковым смесителем на электронном разогреве |
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2005 |
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Известия высших учебных заведений. Радиофизика |
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48 |
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10 |
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964-970 |
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russian |
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Duplicated as 381 |
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380 |
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Klaassen, T. O.; Hovenier, J. N.; Adam, A. J. L.; Fischer, J.; Jakob, G.; Poglitsch, A.; Redlich, B. |
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Terahertz calorimetry for the Herschel Space Observatory |
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2004 |
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Proc. 29th IRMMW / 12th THz |
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815-816 |
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mirror, reflection index, emissivity, calorimetry, space observatory, terahertz, THz |
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578 |
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