Records |
Author |
Gershenzon, E. M.; Gol'tsman, G. N.; Gogidze, I. G.; Gusev, Yu. P.; Elantiev, A. I.; Karasik, B. S.; Semenov, A. D. |
Title |
Millimeter and submillimeter wave range mixer based on electronic heating of superconducting films in the resistive state |
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Journal Article |
Year |
1990 |
Publication |
Sov. Supercond. |
Abbreviated Journal |
Sov. Supercond. |
Volume |
3 |
Issue |
10 |
Pages |
1582-1597 |
Keywords |
HEB mixers |
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240 |
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Author |
Gershenzon, E. M.; Gol'tsman, G. N. |
Title |
Hot electron superconductive mixers |
Type |
Conference Article |
Year |
1993 |
Publication |
Proc. 4th Int. Symp. Space Terahertz Technol. |
Abbreviated Journal |
Proc. 4th Int. Symp. Space Terahertz Technol. |
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Pages |
618-622 |
Keywords |
HEB mixers |
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1656 |
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Author |
Kollberg, Erik L.; Gershenzon, E.; Goltsman, G.; Yngvesson, K. S. |
Title |
Hot electron mixers, the potential competition |
Type |
Conference Article |
Year |
1992 |
Publication |
Proc. ESA Symp. on Photon Detectors for Space Instrumentation |
Abbreviated Journal |
Proc. ESA Symp. on Photon Detectors for Space Instrumentation |
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Issue |
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Pages |
201-206 |
Keywords |
HEB mixers |
Abstract |
There is an urgent need in radio astronomy for low noise heterodyne receivers for frequencies above about 500 GHz. It is not certain that mixers based on superconducting quasiparticle tunnelling (SIS mixers) may turn out to be the answer to this need. In order to try to find an alternative way for realizing low noise heterodyne receivers for submillimeter waves, so called hot electron bolometric effects for mixing are now being investigated. Two basically different approaches are tried, one based on semiconductors and one on superconductors. Both methods are briefly discussed in this overview paper. |
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ESA Symposium on Photon Detectors for Space Instrumentation |
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1667 |
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Author |
Cherednichenko, S.; Yagoubov, P.; Il'in, K.; Gol'tsman, G.; Gershenzon, E. |
Title |
Large bandwidth of NbN phonon-cooled hot-electron bolometer mixers |
Type |
Conference Article |
Year |
1997 |
Publication |
Proc. 27th Eur. Microwave Conf. |
Abbreviated Journal |
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Volume |
2 |
Issue |
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Pages |
972-977 |
Keywords |
HEB mixer, fabrication process |
Abstract |
The bandwidth of NbN phonon-cooled hot electron bolometer mixers has been systematically investigated with respect to the film thickness and film quality variation. The films, 2.5 to 10 nm thick, were fabricated on sapphire substrates using DC reactive magnetron sputtering. All devices consisted of several parallel strips, each 1 um wide and 2 um long, placed between Ti-Au contact pads. To measure the gain bandwidth we used two identical BWOs operating in the 120-140 GHz frequency range, one functioning as a local oscillator and the other as a signal source. The majority of the measurements were made at an ambient temperature of 4.2 K with optimal LO and DC bias. The maximum 3 dB bandwidth (about 4 GHz) was achieved for the devices made of films which were 2.5-3.5 nm thick, had a high critical temperature, and high critical current density. A theoretical analysis of bandwidth for these mixers based on the two-temperature model gives a good description of the experimental results if one assumes that the electron temperature is equal to the critical temperature. |
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Jerusalem, Israel |
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IEEE |
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27th Eur. Microwave Conf. |
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Serial |
1075 |
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Author |
Semenov, A. D.; Hübers, H.-W.; Schubert, J.; Gol'tsman, G. N.; Elantiev, A. I.; Voronov, B. M.; Gershenzon, E. M. |
Title |
Design and performance of the lattice-cooled hot-electron terahertz mixer |
Type |
Journal Article |
Year |
2000 |
Publication |
J. Appl. Phys. |
Abbreviated Journal |
J. Appl. Phys. |
Volume |
88 |
Issue |
11 |
Pages |
6758-6767 |
Keywords |
HEB mixer, charge imbalance, HF current distribution |
Abstract |
We present the measurements and the theoreticalmodel of the frequency-dependent noise temperature of a superconductor lattice-cooled hot-electron bolometer mixer in the terahertz frequency range. The increase of the noise temperature with frequency is a cumulative effect of the nonuniform distribution of the high-frequency current in the bolometer and the charge imbalance, which occurs at the edges of the normal domain and at the contacts with normal metal. We show that under optimal operation the fluctuation sensitivity of the mixer is determined by thermodynamic fluctuations of the noise power, whereas at small biases there appears additional noise, which is probably due to the flux flow. We propose the prescription of how to minimize the influence of the current distribution on the mixer performance. |
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0021-8979 |
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306 |
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