| Records |
Author  |
Tinkham, Mikhael |
| Title |
Introduction to superconductivity |
Type |
Book Whole |
| Year |
1996 |
Publication |
McGraw-Hill |
Abbreviated Journal |
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Issue |
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Pages |
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| Keywords |
superconductivity, BCS, GL |
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Place of Publication |
USA |
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Edition |
2 |
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| Notes |
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Approved |
no |
| Call Number |
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Serial |
896 |
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| Author |
Semenov, A. D.; Gousev, Y. P.; Nebosis, R. S.; Renk, K. F.; Yagoubov, P.; Voronov, B. M.; Gol’tsman, G. N.; Syomash, V. D.; Gershenzon, E. M. |
| Title |
Heterodyne detection of THz radiation with a superconducting hot‐electron bolometer mixer |
Type |
Journal Article |
| Year |
1996 |
Publication |
Appl. Phys. Lett. |
Abbreviated Journal |
Appl. Phys. Lett. |
| Volume |
69 |
Issue |
2 |
Pages |
260-262 |
| Keywords |
NbN HEB mixers |
| Abstract |
We report on the use of a superconducting hot‐electron bolometer mixer for heterodyne detection of terahertz radiation. Radiation with a wavelength of 119 μm was coupled to the mixer, a NbN microbridge, by a hybrid quasioptical antenna consisting of an extended hyperhemispherical lens and a planar logarithmic spiral antenna. We found, at an intermediate frequency of 1.5 GHz, a system double side band noise temperature of ≊40 000 K and conversion losses of 25 dB. We also discuss the possibilities of further improvement of the mixer performance. |
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Edition |
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| ISSN |
0003-6951 |
ISBN |
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| Notes |
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Approved |
no |
| Call Number |
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Serial |
1610 |
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| Author |
Nebosis, R. S.; Semenov, A. D.; Gousev, Yu. P.; Renk, K. F. |
| Title |
Rigorous analysis of a superconducting hot-electron bolometer mixer: theory and comparision with experiment |
Type |
Conference Article |
| Year |
1996 |
Publication |
Proc. 7th Int. Symp. Space Terahertz Technol. |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
601-613 |
| Keywords |
HEB mixer, model, conversion gain, noise temperature, impedance, 2.5 THz |
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Place of Publication |
Charlottesville, Virginia, USA |
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Approved |
no |
| Call Number |
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Serial |
605 |
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| Author |
Kerr, A. R.; Feldman, M. J.; Pan, S.-K. |
| Title |
Receiver noise temperature, the quantum noise limit, and the role of the zero-point fluctuations |
Type |
Journal Article |
| Year |
1996 |
Publication |
Electronics division internal report NO. 304 |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
1-10 |
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no |
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RPLAB @ atomics90 @ |
Serial |
947 |
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| Author |
Kawamura, J.; Blundell, R.; Tong, C.‐yu E.; Gol’tsman, G.; Gershenzon, E.; Voronov, B. |
| Title |
Performance of NbN lattice‐cooled hot‐electron bolometric mixers |
Type |
Journal Article |
| Year |
1996 |
Publication |
J. Appl. Phys. |
Abbreviated Journal |
J. Appl. Phys. |
| Volume |
80 |
Issue |
7 |
Pages |
4232-4234 |
| Keywords |
NbN HEB mixers |
| Abstract |
The heterodyne performance of lattice‐cooled hot‐electron bolometric mixers is measured at 200 GHz. Superconducting thin‐film niobium nitride strips with ∼5 nm thickness are used as waveguide mixer elements. A double‐sideband receiver noise temperature of 750 K at 244 GHz is measured at an intermediate frequency centered at 1.5 GHz with 500 MHz bandwidth and with 4.2 K device temperature. The instantaneous bandwidth for this mixer is 1.6 GHz. The local oscillator power required by the mixer is about 0.5 μW. The mixer is linear to within 1 dB up to an input power level 6 dB below the local oscillator power. A receiver incorporating a hot‐electron bolometric mixer was used to detect molecular line emission in a laboratory gascell. This experiment unambiguously confirms that the receiver noise temperature determined from Y‐factor measurements reflects the true heterodyne sensitivity. |
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Edition |
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| ISSN |
0021-8979 |
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| Notes |
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no |
| Call Number |
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Serial |
1607 |
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