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Dryazgov, M.; Semenov, A.; Manova, N.; Korneeva, Y.; Korneev, A. |
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Title |
Modelling of normal domain evolution after single-photon absorption of a superconducting strip of micron width |
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Conference Article |
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2020 |
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J. Phys.: Conf. Ser. |
Abbreviated Journal |
J. Phys.: Conf. Ser. |
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1695 |
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012195 (1 to 4) |
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Keywords |
SSPD modelling, SNSPD |
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Abstract |
The present paper describes a modelling of normal domain evolution in superconducting strip of micron width using solving differential equations describing the temperature and current changes. The solving results are compared with experimental data. This comparison demonstrates the high accuracy of the model. In future, it is possible to employ this model for improvement of single photon detector based on micron-scale superconducting strips. |
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1742-6588 |
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1785 |
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Polyakova, M. I.; Korneev, A. A.; Semenov, A. V. |
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Title |
Comparison single- and double- spot detection efficiencies of SSPD based to MoSi and NbN films |
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Conference Article |
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2020 |
Publication |
J. Phys.: Conf. Ser. |
Abbreviated Journal |
J. Phys.: Conf. Ser. |
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1695 |
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012146 (1 to 3) |
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Keywords |
NbN SSPD, SNSPD, MoSi |
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In this work, we present results of quantum detector tomography of superconducting single photon detector (SSPD) based on MoSi film, and compare them with previously reported data on NbN. We find that for both materials hot spot interaction length coincides with the strip width, and the dependence of single and double-spot detection efficiencies on bias current are compatible with sufficiently large hot-spot size, approaching the strip width. |
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1742-6588 |
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1787 |
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Polyakova, M. I.; Florya, I. N.; Semenov, A. V.; Korneev, A. A.; Goltsman, G. N. |
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Title |
Extracting hot-spot correlation length from SNSPD tomography data |
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Conference Article |
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2019 |
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J. Phys.: Conf. Ser. |
Abbreviated Journal |
J. Phys.: Conf. Ser. |
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1410 |
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012166 (1 to 4) |
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Keywords |
SSPD, SNSPD, quantum detector tomography, QDT |
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We present data of quantum detector tomography for the samples specifically optimized for this problem. Using this method, we take results of hot-spot correlation length of 17 ± 2 nm. |
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1273 |
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Gol'tsman, G. N.; Semenov, A. D.; Gousev, Y. P.; Zorin, M. A.; Gogidze, I. G.; Gershenzon, E. M.; Lang, P. T.; Knott, W. J.; Renk, K. F. |
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Sensitive picosecond NbN detector for radiation from millimetre wavelengths to visible light |
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Journal Article |
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Year |
1991 |
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Supercond. Sci. Technol. |
Abbreviated Journal |
Supercond. Sci. Technol. |
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4 |
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9 |
Pages |
453-456 |
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Keywords |
NbN HEB detectors |
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The authors report on the application of a broad-band NbN film detector which has high sensitivity and picosecond response time for detection of radiation from millimetre wavelengths to visible light. From a study of amplitude modulated radiation of backward-wave tubes and picosecond pulses from gas and solid state lasers at wavelengths between 2 mm and 0.53 mu m, they found a detectivity of 1010 W-1 cm Hz-1/2 and a response time of less than 50 ps at T=10 K. The characteristics were provided by using a 150 AA thick NbN film patterned into a structure of micron strips. According to the proposed detection mechanism, namely electron heating, they expect an intrinsic response time of approximately 20 ps at the same temperature. |
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0953-2048 |
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242 |
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Galin, M. A.; Klushin, A. M.; Kurin, V. V.; Seliverstov, S. V.; Finkel, M. I.; Goltsman, G. N.; Müller, F.; Scheller, T.; Semenov, A. D. |
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Towards local oscillators based on arrays of niobium Josephson junctions |
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Journal Article |
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2015 |
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Supercond. Sci. Technol. |
Abbreviated Journal |
Supercond. Sci. Technol. |
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28 |
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5 |
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055002 (1 to 7) |
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Keywords |
Josephson junction local oscillators, JJ LO |
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Various applications in the field of terahertz technology are in urgent need of compact, wide-tunable solid-state continuous wave radiation sources with a moderate power. However, satisfactory solutions for the THz frequency range are scarce yet. Here we report on coherent radiation from a large planar array of Josephson junctions (JJs) in the frequency range between 0.1 and 0.3 THz. The external resonator providing the synchronization of JJ array is identified as a straight fragment of a single-strip-line containing the junctions themselves. We demonstrate a prototype of the quasioptical heterodyne receiver with the JJ array as a local oscillator and a hot-electron bolometer mixer. |
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0953-2048 |
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1347 |
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