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Kuznetsov, K. A.; Kornienko, V. V.; Vakhtomin, Y. B.; Pentin, I. V.; Smirnov, K. V.; Kitaeva, G. K. |
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Generation and detection of optical-terahertz biphotons via spontaneous parametric downconversion |
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2018 |
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Proc. ICLO |
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Proc. ICLO |
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303 |
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NbN HEB applications |
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We study spontaneous parametric downconversion (SPDC) in the strongly non-degenerate regime when the idler wave hits the terahertz range. By using the hot-electron bolometer, for the first time the SPDC-generated idler-wave photons were directly detected in the terahertz frequency range. Spectrum of corresponding signal photons was measured using standard technique by the CCD camera. Possible applications of correlated optical-terahertz biphotons are discussed. |
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International Conference Laser Optics |
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1806 |
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Райтович, А. А.; Пентин, И. В.; Золотов, Ф. И.; Селезнев, В. А.; Вахтомин, Ю. Б.; Смирнов, К. В. |
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Title |
Время энергетической релаксации электронов в сверхпроводниковых VN наноструктурах |
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Conference Article |
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2018 |
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Сборник трудов 13 Всероссийской конференции молодых ученых |
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236-238 |
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VN films |
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Саратовский филиал ИРЭ им. В.А. Котельникова РАН |
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Техно-Декор |
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Russian |
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Наноэлектроника, нанофотоника и нелинейная физика |
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http://nnnph.ru/data/documents/Sborni-trudov-NNNF-2018.pdf |
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1807 |
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Lobanov, Y. V.; Vakhtomin, Y. B.; Pentin, I. V.; Khabibullin, R. A.; Shchavruk, N. V.; Smirnov, K. V.; Silaev, A. A. |
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Characterization of the THz quantum cascade laser using fast superconducting hot electron bolometer |
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2018 |
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EPJ Web Conf. |
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EPJ Web Conf. |
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195 |
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04004 (1 to 2) |
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NbN HEB, QCL |
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2100-014X |
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3rd International Conference “Terahertz and Microwave Radiation: Generation, Detection and Applications” (TERA-2018) |
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1808 |
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Zolotov, P.; Divochiy, A.; Vakhtomin, Y.; Moshkova, M.; Morozov, P.; Seleznev, V.; Smirnov, K. |
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Photon-number-resolving SSPDs with system detection efficiency over 50% at telecom range |
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2018 |
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Proc. AIP Conf. |
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1936 |
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1 |
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020019 |
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NbN PNR SSPD, SNSPD |
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We used technology of making high-efficiency superconducting single-photon detectors as a basis for improvement of photon-number-resolving devices. By adding optical cavity and using an improved NbN superconducting film, we enhanced previously reported system detection efficiency at telecom range for such detectors. Our results show that implementation of optical cavity helps to develop four-section device with quantum efficiency over 50% at 1.55 µm. Performed experimental studies of detecting multi-photon optical pulses showed irregularities over defining multi-photon through single-photon quantum efficiency. |
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doi:10.1063/1.5025457 |
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1231 |
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Baeva, E.; Sidorova, M.; Korneev, A.; Goltsman, G. |
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Precise measurement of the thermal conductivity of superconductor |
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2018 |
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Proc. AIP Conf. |
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Proc. AIP Conf. |
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1936 |
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1 |
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020003 (1 to 4) |
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NbN SSPD, SNSPD |
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Measuring the thermal properties such as the heat capacity provide information about intrinsic mechanisms operated inside. In general, the ratio between electron and phonon specific heat Ce/Cp shows how the absorbed energy shared between electron and phonon subsystems. In this work we make estimations for amplitude-modulated absorption of THz radiation technique for investigation of the ratio Ce/Cp in superconducting Niobium Nitride (NbN) at T = Tc. Our results indicates that experimentally the frequency of modulation has to be extra large to extract the quantity. We perform a new technique allowed to work at low frequency with accurately measurement of absorbed power. |
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doi:10.1063/1.5025441 |
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1311 |
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