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Мошкова, М. А.; Дивочий, А. В.; Морозов, П. В.; Антипов, А. В.; Вахтомин, Ю. Б.; Смирнов, К. В. |
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Оценка статистики распределения фотонов с использованием многоэлементного сверхпроводникового однофотонного детектора |
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Conference Article |
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Year |
2019 |
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Межвузовская научно-техническая конференция студентов, аспирантов и молодых специалистов им. Е. В. Арменского |
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201-202 |
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SSPD |
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Проведен сравнительный анализ топологий сверхпроводниковых однофотонных детекторов с способностью к разрешению до четырёх фотонов в коротком импульсе ИК излучения. Получен детектор, с системной квантовой эффективностью ~85% на λ=1550 нм. Продемонстрирована возможность его использования для распределения числа фотонов импульсного источника излучения. |
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Москва |
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МИЭМ НИУ ВШЭ |
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Russian |
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1804 |
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Золотов, Ф. И.; Смирнов, К. В. |
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Title |
Особенности осаждения разупорядоченных сверхтонких плёнок нитрида ванадия |
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Conference Article |
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Year |
2019 |
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Межвузовская научно-техническая конференция студентов, аспирантов и молодых специалистов им. Е. В. Арменского |
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204-205 |
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VN films |
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В работе изучены особенности роста сверхтонких плёнок нитрида ванадия толщиной ~10 нм. Обнаружено, что при изменении температуры подложки и общего давления газов в процессе осаждения плёнок меняется значение их поверхностного сопротивления вблизи перехода к сверхпроводящему состоянию. |
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Москва |
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МИЭМ НИУ ВШЭ |
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1805 |
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Polyakova, M.; Semenov, A. V.; Kovalyuk, V.; Ferrari, S.; Pernice, W. H. P.; Gol'tsman, G. N. |
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Title |
Protocol of measuring hot-spot correlation length for SNSPDs with near-unity detection efficiency |
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Journal Article |
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2019 |
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IEEE Trans. Appl. Supercond. |
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IEEE Trans. Appl. Supercond. |
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29 |
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5 |
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1-5 |
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SSPD, waveguide-integrated SNSPD, hot-spot interaction length |
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We present a simple quantum detector tomography protocol, which allows, without ambiguities, to measure the two-spot detection efficiency and extract the hot-spot interaction length of superconducting nanowire single photon detectors (SNSPDs) with unity intrinsic detection efficiency. We identify a significant parasitic contribution to the measured two-spot efficiency, related to an effect of the bias circuit, and find a way to rule out this contribution during data post-processing and directly in the experiment. From the data analysis for waveguide-integrated SNSPD, we find signatures of the saturation of the two-spot efficiency and hot-spot interaction length of order of 100 nm. |
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1051-8223 |
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1187 |
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Baksheeva, K.; Vdovydchenko, A.; Gorshkov, K.; Ozhegov, R.; Kinev, N.; Koshelets, V.; Goltsman, G. |
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Title |
Study of human skin radiation in the terahertz frequency range |
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Conference Article |
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2019 |
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J. Phys.: Conf. Ser. |
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J. Phys.: Conf. Ser. |
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1410 |
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012076 (1 to 5) |
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SIS mixer, SIR, applications, medicine, sympathetic nervous system, SNS |
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The radiation of human skin in the terahertz frequency range under the influence of mental stresses has been studied in the current work. An experimental setup for observation of changes in human skin radiation, which occur under the influence of psychological stresses, by means of a superconducting integrated receiver has been developed. More than 30 volunteers participate in these studies, which allows us to verify presence of correlation between the signals from the superconducting integrated terahertz receiver and other sensors that monitor human mental stress. |
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1742-6588 |
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1272 |
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Moshkova, M.; Morozov, P.; Divochiy, A.; Vakhtomin, Y.; Smirnov, K. |
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Title |
Large active area superconducting single photon detector |
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Conference Article |
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2019 |
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J. Phys.: Conf. Ser. |
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J. Phys.: Conf. Ser. |
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1410 |
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012139 |
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Keywords |
SSPD, SNSPD |
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We present development of large active area superconducting single-photon detectors well coupled with standard 50 μm-core multi-mode fiber. The sensitive area of the SSPD is patterned using the photon-number-resolving design and occupies an area of 40×40 μm2. Using this approach, we have obtained excellent specifications: system detection efficiency of 47% measured using a 900 nm laser and low dark count rate of 100 cps. The main advantages of the approach presented are a very short dead time of the detector of 22 ns and FWHM jitter value of about 130 ps. |
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1742-6588 |
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1224 |
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