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Gao, J. R.; Hajenius, M.; Baselmans, J. J. A.; Yang, Z. Q.; Baryshev, A. M.; Barends, R.; Klapwijk, T. M.; Voronov, B.; Gol'tsman, G.; Callaos, N. |
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Twin-slot antenna coupled NbN hot electron bolometer mixers for space applications |
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Conference Article |
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2005 |
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Proc. 9-th WMSCI |
Abbreviated Journal |
Proc. 9-th WMSCI |
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9 |
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148-153 |
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NbN HEB mixers |
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International Institute of Informatics and Systemics |
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9806560639, 9789806560635 |
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9th World Multi-Conference on Systemics, Cybernetics and Informatics |
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1480 |
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Gol'tsman, G. N.; Korneev, A.; Rubtsova, I.; Milostnaya, I.; Chulkova, G.; Minaeva, O.; Smirnov, K.; Voronov, B.; Słysz, W.; Pearlman, A.; Verevkin, A.; Sobolewski, R. |
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Title |
Ultrafast superconducting single-photon detectors for near-infrared-wavelength quantum communications |
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Journal Article |
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2005 |
Publication |
Phys. Stat. Sol. (C) |
Abbreviated Journal |
Phys. Stat. Sol. (C) |
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Volume |
2 |
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5 |
Pages |
1480-1488 |
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Keywords |
NbN SSPD, SNSPD |
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Abstract |
We present our progress on the research and development of NbN superconducting single‐photon detectors (SSPD's) for ultrafast counting of near‐infrared photons for secure quantum communications. Our SSPD's operate in the quantum detection mode based on the photon‐induced hotspot formation and subsequent development of a transient resistive barrier across an ultrathin and submicron‐width superconducting stripe. The devices are fabricated from 4‐nm‐thick NbN films and kept in the 4.2‐ to 2‐K temperature range. The detector experimental quantum efficiency in the photon‐counting mode reaches above 40% for the visible light and up to 30% in the 1.3‐ to 1.55‐µm wavelength range with dark counts below 0.01 per second. The experimental real‐time counting rate is above 2 GHz and is limited by our readout electronics. The SSPD's timing jitter is below 18 ps, and the best‐measured value of the noise‐equivalent power (NEP) is 5 × 10–21 W/Hz1/2 at 1.3 µm. In terms of quantum efficiency, timing jitter, and maximum counting rate, our NbN SSPD's significantly outperform semiconductor avalanche photodiodes and photomultipliers in the 1.3‐ to 1.55‐µm range. |
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1610-1634 |
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1479 |
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Edward Tong, C.-Y.; Loudkov, Denis N.; Paine, Scott N.; Marrone, Dan P.; Blundell, Raymond |
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Title |
Vector measurement of the beam pattern of a 1.5 THz superconducting HEB receiver |
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Conference Article |
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Year |
2005 |
Publication |
Proc. 16th Int. Symp. Space Terahertz Technol. |
Abbreviated Journal |
Proc. 16th Int. Symp. Space Terahertz Technol. |
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453-456 |
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Keywords |
NbTiN HEB mixers |
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Near-field vector beam pattern of the 1.5 THz superconducting Hot Electron Bolometer (HEB) receiver currently in operation in Northern Chile has been performed in our laboratory. Using an open waveguide probe, we have mapped both the amplitude and phase of the beam emerging from our 1.5 THz HEB receiver package, across a number of planes along the line of propagation of the radio-beam. With an integration time of about 100 ms per point, a signal-to-noise ratio of about 25 dB was achieved for a beam waist of 3.5 mm. These measurements have proved to be invaluable in achieving good alignment between the cryostat housing the HEB mixer and the remainder of the receiver and telescope optics. The accuracy of our beam measurement is estimated to be ±0.2 mm in position and ±5 arc minutes in angular displacement. |
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1474 |
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ГОСТ Р 51904-2002. Программное обеспечение встроенных систем. Общие требования к разработке и документированию |
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Book Whole |
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2005 |
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gost, detproj |
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875 |
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Кошелец, В. П.; Дмитриев, П. Н.; Ермаков, А. Б.; Филиппенко, Л. В.; Корюкин, О. В.; Торгашин, М. Ю.; Худченко, А. В. |
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Title |
Интегральный сверхпроводниковый спектрометр |
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Journal Article |
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Year |
2005 |
Publication |
Известия вузов. Радиофизика |
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48 |
Issue |
10-11 |
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947-954 |
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SIR |
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russian |
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518 |
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