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Hajenius, M.; Baselmans, J. J. A.; Baryshev, A.; Gao, J. R.; Klapwijk, T. M.; Kooi, J. W.; Jellema, W.; Yang, Z. Q. |
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Title |
Full characterization and analysis of a terahertz heterodyne receiver based on a NbN hot electron bolometer |
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Year |
2006 |
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J. Appl. Phys. |
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Volume |
100 |
Issue |
7 |
Pages |
074507 |
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Keywords |
HEB |
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0021-8979 |
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RPLAB @ s @ |
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385 |
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Semenov, A. D.; Hübers, H.-W.; Schubert, J.; Gol'tsman, G. N.; Elantiev, A. I.; Voronov, B. M.; Gershenzon, E. M. |
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Title |
Design and performance of the lattice-cooled hot-electron terahertz mixer |
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Journal Article |
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Year |
2000 |
Publication |
J. Appl. Phys. |
Abbreviated Journal |
J. Appl. Phys. |
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Volume |
88 |
Issue |
11 |
Pages |
6758-6767 |
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Keywords |
HEB mixer, charge imbalance, HF current distribution |
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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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Kooi, J. W.; Baselmans, J. J. A.; Hajenius, M.; Gao, J. R.; Klapwijk, T. M.; Dieleman, P.; Baryshev, A.; de Lange, G. |
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Title |
IF impedance and mixer gain of NbN hot electron bolometers |
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Journal Article |
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Year |
2007 |
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J. Appl. Phys. |
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Volume |
101 |
Issue |
4 |
Pages |
044511 |
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0021-8979 |
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RPLAB @ s @ |
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445 |
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Burke, P. J.; Schoelkopf, R. J.; Prober, D. E.; Skalare, A.; Karasik, B. S.; Gaidis, M. C.; McGrath, W. R.; Bumble, B.; LeDuc, H. G. |
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Title |
Mixing and noise in diffusion and phonon cooled superconducting hot-electron bolometers |
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Journal Article |
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Year |
1999 |
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J. Appl. Phys. |
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Volume |
85 |
Issue |
3 |
Pages |
1644-1653 |
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Keywords |
HEB, mixer |
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0021-8979 |
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556 |
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Cherednichenko, S.; Drakinskiy, V.; Baubert, J.; Krieg, J.-M.; Voronov, B.; Gol'tsman, G.; Desmaris, V. |
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Title |
Gain bandwidth of NbN hot-electron bolometer terahertz mixers on 1.5 μm Si3N4 / SiO2 membranes |
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Journal Article |
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2007 |
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J. Appl. Phys. |
Abbreviated Journal |
J. Appl. Phys. |
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Volume |
101 |
Issue |
12 |
Pages |
124508 (1 to 6) |
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Keywords |
HEB, mixer, membrane |
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Abstract |
The gain bandwidth of NbN hot-electron bolometer terahertz mixers on electrically thin Si3N4/SiO2 membranes was experimentally investigated and compared with that of HEB mixers on bulk substrates. A gain bandwidth of 3.5 GHz is achieved on bulk silicon, whereas the gain bandwidth is reduced down to 0.6–0.9 GHz for mixers on 1.5 μm Si3N4/SiO2 membranes. We show that application of a MgO buffer layer on the membrane extends the gain bandwidth to 3 GHz. The experimental data were analyzed using the film-substrate acoustic mismatch approach. |
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0021-8979 |
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560 |
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