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Author |
Cherednichenko, S.; Drakinskiy, V. |
Title |
Low noise hot-electron bolometer mixers for terahertz frequencies |
Type |
Journal Article |
Year |
2008 |
Publication |
J. Low Temp. Phys. |
Abbreviated Journal |
J. Low Temp. Phys. |
Volume |
151 |
Issue |
1-2 |
Pages |
575-579 |
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HEB, mixer, gain bandwidth, MgB2 |
Abstract |
Hot-electron bolometer (HEB) mixers are used in many low noise heterodyne radio astronomical receivers. Their noise temperature is at the level of 10–15 times the quantum limit. However, their gain bandwidth is a serious limiting factor. Here we review the state of the art of the HEB mixers gain bandwidth for different materials and substrates. We compare the gain bandwidth of HEB mixers made on bulk substrates and thin membranes. Finally, results for MgB2 thin films for broadband HEB mixers are discussed. |
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0022-2291 |
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RPLAB @ lobanovyury @ |
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553 |
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Gershenzon, E. M.; Gol'tsman, G. N.; Elantiev, A. I.; Karasik, B. S.; Potoskuev, S. E. |
Title |
Intense electromagnetic radiation heating of electrons of a superconductor in the resistive state |
Type |
Journal Article |
Year |
1988 |
Publication |
Sov. J. Low Temp. Phys. |
Abbreviated Journal |
Sov. J. Low Temp. Phys. |
Volume |
14 |
Issue |
7 |
Pages |
414-420 |
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HEB |
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Duplicated as 1697 |
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236 |
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Author |
Schmid, Albert; Schön, Gerd |
Title |
Linearized kinetic equations and relaxation processes of a superconductor near Tc |
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Journal Article |
Year |
1975 |
Publication |
J. Low Temp. Phys. |
Abbreviated Journal |
J. Low Temp. Phys. |
Volume |
20 |
Issue |
1-2 |
Pages |
207-227 |
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Abstract |
Starting from the equation of Gor'kov and Eliashberg in a form introduced by Eilenberger, we derive a set of linearized equations for the deviation from the equilibrium value of the quasiparticle distribution function as well as of the order parameter. These equations resemble the Boltzmann equation and the Ginzburg-Landau equation, respectively, and they form a set of coupled equations. Two different modes can be distinguished, depending on whether the order parameter changes in magnitude or in phase. The equations are solved for the case of a stationary quasiparticle injection into a superconductor and the change in the electrochemical potential of the quasiparticles is calculated. Furthermore, we treat the problem of a current flowing perpendicular to a superconducting-normal interface in which a normal current is converted into a supercurrent, and we calculate the extra resistance of the interface. |
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922 |
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