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| Author | Чулкова, Г. М.; Семенов, А. В.; Корнеев, А. А.; Кардакова, А. И.; Аверьев, Н. В.; Ан, П. П.; Казаков, А. Ю.; Трифонов, А. В. | ||||
| Title | Спектральная чувствительность сверхпроводникового однофотонного детектора | Type | Journal Article | ||
| Year | 2011 | Publication | Журнал радиоэлектроники | Abbreviated Journal | Ж. радиоэлектрон. |
| Volume | 11 | Issue | Pages | 5 | |
| Keywords | SSPD; quantum efficiency; spectral sensitivity | ||||
| Abstract | We consider quantum efficiency dependence on photons' energy from hot spot model. Direction of quasiparticles diffusion drive across superconductive film. The maximal quantum efficiency is proportional to a probability of photon absorption. The spectral sensitivity of superconductive single photon detector does not have clearly expressed red limit. Changing regimes of work depends on a wavelength we can get high values of quantum efficiency in visible and infrared range which will be specified by the quality of fabrication of detectors and their consistency with the radiation. Key words: superconducting single-photon detector, SSPD, quantum efficiency, spectral sensitivity. В статье представлена зависимость квантовой эффективности от энергии фотона в рамках модели горячего пятна. Диффузия квазичастиц происходит в основном перпендикулярно направлению тока в областях с максимальной плотностью тока. Максимальная квантовая эффективность детектора пропорциональна вероятности поглощения фотона. Несмотря на квантовый характер работы сверхпроводникового однофотонного детектора, он не имеет четко выраженной красной границы. Изменяя режим работы в зависимости от длины волны можно в видимом и инфракрасном диапазонах получать высокие значения квантовой эффективности, которые будут определяться лишь качеством изготовления детекторов и степенью их согласования с излучением. |
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| Notes | Approved | no | |||
| Call Number | RPLAB @ gujma @ | Serial | 844 | ||
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| Author | Il'in, K. S.; Lindgren, M.; Currie, M. A.; Semenov, D.; Gol'tsman, G. N.; Sobolewski, Roman; Cherednichenko, S. I.; Gershenzon, E. M. | ||||
| Title | Picosecond hot-electron energy relaxation in NbN superconducting photodetectors | Type | Journal Article | ||
| Year | 2000 | Publication | Appl. Phys. Lett. | Abbreviated Journal | Appl. Phys. Lett. |
| Volume | 76 | Issue | 19 | Pages | 2752-2754 |
| Keywords | NbN HEB detectors, two-temperature model, IF bandwidth | ||||
| Abstract | We report time-resolved characterization of superconducting NbN hot-electron photodetectors using an electro-optic sampling method. Our samples were patterned into micron-size microbridges from 3.5-nm-thick NbN films deposited on sapphire substrates. The devices were illuminated with 100 fs optical pulses, and the photoresponse was measured in the ambient temperature range between 2.15 and 10.6 K (superconducting temperature transition TC). The experimental data agreed very well with the nonequilibrium hot-electron, two-temperature model. The quasiparticle thermalization time was ambient temperature independent and was measured to be 6.5 ps. The inelastic electron–phonon scattering time Ï„e–ph tended to decrease with the temperature increase, although its change remained within the experimental error, while the phonon escape time Ï„es decreased almost by a factor of two when the sample was put in direct contact with superfluid helium. Specifically, Ï„e–ph and Ï„es, fitted by the two-temperature model, were equal to 11.6 and 21 ps at 2.15 K, and 10(±2) and 38 ps at 10.5 K, respectively. The obtained value of Ï„e–ph shows that the maximum intermediate frequency bandwidth of NbN hot-electron phonon-cooled mixers operating at TC can reach 16(+4/–3) GHz if one eliminates the bolometric phonon-heating effect. | ||||
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| ISSN | 0003-6951 | ISBN |
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| Notes | Approved | no | |||
| Call Number | Serial | 856 | |||
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| Author | Elant'ev, A. I.; Karasik, B. S. | ||||
| Title | Effect of high-frequency current on Nb superconductive film in resistive state | Type | Journal Article | ||
| Year | 1989 | Publication | Sov. J. Low Temp. Phys. | Abbreviated Journal | Sov. J. Low Temp. Phys. |
| Volume | 15 | Issue | 7 | Pages | 379-383 |
| Keywords | Nb HEB | ||||
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| Call Number | Serial | 882 | |||
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| Author | Гершензон, Е. М.; Гольцман, Г. Н.; Елантьев, А. И.; Карасик, Б. С.; Потоскуев, С. Э. | ||||
| Title | Разогрев электронов в резистивном состоянии сверхпроводника электромагнитным излучением значительной интенсивности | Type | Journal Article | ||
| Year | 1988 | Publication | Физика низких температур | Abbreviated Journal | Физика низких температур |
| Volume | 14 | Issue | 7 | Pages | 753-763 |
| Keywords | HEB | ||||
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| Notes | Duplicated as 1697 | Approved | no | ||
| Call Number | Serial | 883 | |||
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| Author | Lobanov, Yury; Shcherbatenko, Michael; Shurakov, Alexander; Rodin, Alexander V.; Klimchuk, Artem; Nadezhdinsky, Alexander I.; Maslennikov, Sergey; Larionov, Pavel; Finkel, Matvey; Semenov, Alexander; Verevkin, Aleksandr A.; Voronov, Boris M.; Ponurovsky, Yakov; Klapwijk, Teunis M.; Gol'tsman, Gregory N. | ||||
| Title | Heterodyne detection at near-infrared wavelengths with a superconducting NbN hot-electron bolometer mixer | Type | Journal Article | ||
| Year | 2014 | Publication | Opt. Lett. | Abbreviated Journal | |
| Volume | 39 | Issue | 6 | Pages | 1429-1432 |
| Keywords | HEB, zebra, IR, infrared | ||||
| Abstract | We report on the development of a highly sensitive optical receiver for heterodyne IR spectroscopy at the communication wavelength of 1.5 μm (200 THz) by use of a superconducting hot-electron bolometer. The results are important for the resolution of narrow spectral molecular lines in the near-IR range for the study of astronomical objects, as well as for quantum optical tomography and fiber-optic sensing. Receiver configuration as well as fiber-to-detector light coupling designs are discussed. Light absorption of the superconducting detectors was enhanced by nano-optical antennas, which were coupled to optical fibers. An intermediate frequency (IF) bandwidth of about 3 GHz was found in agreement with measurements at 300 GHz, and a noise figure of about 25 dB was obtained that was only 10 dB above the quantum limit. | ||||
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| Notes | Approved | no | |||
| Call Number | Serial | 906 | |||
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