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Gershenzon, E. M.; Gershenzon, M. E.; Gol'tsman, G. N.; Semenov, A. D.; Sergeev, A. V. |
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Nonselective effect of electromagnetic radiation on a superconducting film in the resistive state |
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1982 |
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JETP Lett. |
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JETP Lett. |
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36 |
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7 |
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296-299 |
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HEB |
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Неселективное воздействие электромагнитного излучения на сверхпроводящую пленку в резистивном состоянии |
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1717 |
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Корнеев, А. А.; Минаева, О.; Рубцова, И.; Милостная, И.; Чулкова, Г.; Воронов, Б.; Смирнов, К.; Селезнёв, В.; Гольцман, Г.; Pearlman, A.; Slysz, W.; Cross, A.; Alvarez, P.; Верёвкин, А.; Sobolewski, R. |
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Сверхпроводящий однофотонный детектор на основе ультратонкой пленки NbN |
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2005 |
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Квантовая электроника |
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35 |
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8 |
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698-700 |
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NbN SSPD, SNSPD |
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Представлены результаты исследований сверхпроводящих однофотонных детекторов, изготовленных из ультратонкой пленки NbN. Развитие технологического процесса изготовления детекторов, а также снижение рабочей температуры до 2 К позволили существенно увеличить квантовую эффективность: для видимого света (λ = 0.56 мкм) она составила 30%–40%, т.е. достигла предела, определяемого коэффициентом поглощения пленки. С ростом длины волны квантовая эффективность экспоненциально падает, составляя ~20% на λ=1.55 мкм и ~0.02% на λ = 5 мкм. При скорости темнового счета ~10-4s-1 экспериментально измеренная эквивалентная мощность шума составила 1.5 × 10-20 Вт/Гц-1/2; в дальнейшем она может быть уменьшена до рекордно низкого значения 5 × 10-21 Вт/Гц-1/2. Временное разрешение детектора равно 30 пс. |
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Duplicated as 383 (Superconducting single-photon ultrathin NbN film detector) |
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382 |
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Korneev, A.; Minaeva, O.; Rubtsova, I.; Milostnaya, I.; Chulkova, G.; Voronov, B.; Smirnov, K.; Seleznev, V.; Gol'tsman, G.; Pearlman, A.; Slysz, W.; Cross, A.; Alvarez, P.; Verevkin, A.; Sobolewski, R. |
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Superconducting single-photon ultrathin NbN film detector |
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2005 |
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Quantum Electronics |
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35 |
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8 |
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698-700 |
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NbN SSPD, SNSPD |
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Superconducting single-photon ultrathin NbN film detectors are studied. The development of manufacturing technology of detectors and the reduction of their operating temperature down to 2 K resulted in a considerable increase in their quantum efficiency, which reached in the visible region (at 0.56 μm) 30%—40%, i.e., achieved the limit determined by the absorption coefficient of the film. The quantum efficiency exponentially decreases with increasing wavelength, being equal to ~20% at 1.55 μm and ~0.02% at 5 μm. For the dark count rate of ~10-4s-1, the experimental equivalent noise power was 1.5×10-20 W Hz-1/2; it can be decreased in the future down to the record low value of 5×10-21 W Hz-1/2. The time resolution of the detector is 30 ps. |
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Сверхпроводящий однофотонный детектор на основе ультратонкой пленки NbN |
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383 |
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Santhanam, P.; Wind, S.; Prober, D. E. |
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Localization, superconducting fluctuations, and superconductivity in thin films and narrow wires of aluminum |
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1987 |
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Phys. Rev. B |
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Phys. Rev. B |
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35 |
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7 |
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3188-3206 |
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Al films; electron-phonon scattering; electron-electron scattering; Disordered structures; amorphous and glassy solids, Relaxation times and mean free paths, Galvanomagnetic and other magnetotransport effects |
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We report a comprehensive set of experiments on wide and narrow thin-film strips of aluminum which test the predictions of recent localization theory. The experiments on wide films in the two-dimensional regime confirm the theoretical predictions and also yield insight into inelastic mechanisms and spin-orbit scattering rates. Our extension of the existing theory for one-dimensional systems to include spin-orbit scattering and Maki-Thompson superconducting fluctuations is verified by the experiments. We find clear evidence for one-dimensional localization, with inferred inelastic rates identical to those in two-dimensional films. The prediction of the localization theory for a dimensional crossover from two-dimensional to one-dimensional behavior is also confirmed. We have reanalyzed the results of some previous experiments on thin films and narrow wires in light of these results. |
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RPLAB @ gujma @ |
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757 |
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Gershenzon, E. M.; Goltsman, G. N.; Semenov, A. D.; Sergeev, A. V. |
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Title |
Limiting characteristic of fast superconducting bolometers |
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1989 |
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Sov. Phys.-Tech. Phys. |
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Sov. Phys.-Tech. Phys. |
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34 |
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195-199 |
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Теоретически и экспериментально исследовано физическое ограничение быстродействия сверхпроводящего болометра. Показано, что минимальная постоянная времени реализуется в условиях электронного разогрева и определяется процессом неупругого электрон-фонон- ного взаимодействия. Сформулированы требования кконструкции «электронного болометра» для достижения предельной чувствительности. Проведено сравнение характеристик электронного болометра и обычных болометров различных типов. |
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О предельных характеристиках быстродействующих серхпроводниковых болометров |
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