| Records |
| Author |
Kerr, A. R.; Feldman, M. J.; Pan, S.-K. |
| Title |
Receiver noise temperature, the quantum noise limit, and zero–point fluctuations |
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Conference Article |
| Year |
1997 |
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Proc. 8th Int. Symp. Space Terahertz Technol. |
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101-111 |
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277 |
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| Author |
de Lange, G.; Hu, Q.; Huang, H.; Lichtenberger, A. W. |
| Title |
Development of a 170-210 GHz 3×3 micromachined SIS imaging array |
Type |
Conference Article |
| Year |
1997 |
Publication |
Proc. 8th Int. Symp. Space Terahertz Technol. |
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518 |
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no |
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278 |
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ГОСТ Р 50995.0.1-96. Технологическое обеспечение создания продукции. Основные положения |
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Book Whole |
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1997 |
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gost, detproj |
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no |
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873 |
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Pothier, H.; Guéron, S.; Birge, Norman O.; Esteve, D.; Devoret, M. H. |
| Title |
Energy distribution function of quasiparticles in mesoscopic wires |
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Journal Article |
| Year |
1997 |
Publication |
Phys. Rev. Lett. |
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79 |
Issue |
18 |
Pages |
3490-3493 |
| Keywords |
tunnel probe, metallic nanowire, diffusive wire, diffusive nanowire |
| Abstract |
We have measured with a tunnel probe the energy distribution function of Landau quasiparticles in metallic diffusive wires connected to two reservoir electrodes, with an applied bias voltage. The distribution function in the middle of a 1.5-μm-long wire resembles the half sum of the Fermi distributions of the reservoirs. The distribution functions in 5-μm-long wires are more rounded, due to interactions between quasiparticles during the longer diffusion time across the wire. From the scaling of the data with the bias voltage, we find that the scattering rate between two quasiparticles varies as <c9><203a>–2, where <c9><203a> is the energy transferred. |
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921 |
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Cherednichenko, S.; Yagoubov, P.; Il'in, K.; Gol'tsman, G.; Gershenzon, E. |
| Title |
Large bandwidth of NbN phonon-cooled hot-electron bolometer mixers |
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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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1075 |
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