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Simonov, N. O.; Korneeva, Y. P.; Korneev, A. A.; Goltsman, G. N. |
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Title |
Enhance of the superconducting properties of the NbN/Au bilayer bridges |
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Conference Article |
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Year |
2020 |
Publication |
J. Phys.: Conf. Ser. |
Abbreviated Journal |
J. Phys.: Conf. Ser. |
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Volume |
1695 |
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012132 (1 to 4) |
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Keywords |
SSPD, SNSPD |
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Abstract |
We experimentally demonstrate strong temperature dependence of the critical current of the superconducting 600-nm-wide and 5-μm-long bridge made of NbN/Au bilayer. The result is achieved due to the proximity effect realized between the highly disordered superconducting NbN layer and low resistive normal-metal Au layer. |
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1742-6588 |
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1263 |
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Manova, N. N.; Smirnov, E. O.; Korneeva, Yu. P.; Korneev, A. A.; Goltsman, G. N. |
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Title |
Superconducting photon counter for nanophotonics applications |
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Conference Article |
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Year |
2019 |
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J. Phys.: Conf. Ser. |
Abbreviated Journal |
J. Phys.: Conf. Ser. |
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1410 |
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012147 (1 to 5) |
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Keywords |
SSPD, SNSPD |
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We develop large area superconducting single-photon detector SSPD with a micron-wide strip suitable for free-space coupling or packaging with multi-mode optical fibres. The detector sensitive area is 20 μm in diameter. In near infrared (1330 nm wavelength) our SSPD exhibits above 30% detection efficiency with low dark counts and 45 ps timing jitter. |
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1742-6588 |
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1271 |
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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. |
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J. Phys.: Conf. Ser. |
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1410 |
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012166 (1 to 4) |
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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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Korneeva, Y. P.; Vodolazov, D. Y.; Semenov, A. V.; Florya, I. N.; Simonov, N.; Baeva, E.; Korneev, A. A.; Goltsman, G. N.; Klapwijk, T. M. |
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Title |
Optical single-photon detection in micrometer-scale NbN bridges |
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Journal Article |
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2018 |
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Phys. Rev. Applied |
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Phys. Rev. Applied |
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9 |
Issue |
6 |
Pages |
064037 (1 to 13) |
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Keywords |
NbN SSPD, SNSPD |
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We demonstrate experimentally that single-photon detection can be achieved in micrometer-wide NbN bridges, with widths ranging from 0.53 to 5.15 μm and for photon wavelengths of 408 to 1550 nm. The microbridges are biased with a dc current close to the experimental critical current, which is estimated to be about 50% of the theoretically expected depairing current. These results offer an alternative to the standard superconducting single-photon detectors, based on nanometer-scale nanowires implemented in a long meandering structure. The results are consistent with improved theoretical modeling based on the theory of nonequilibrium superconductivity, including the vortex-assisted mechanism of initial dissipation. |
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2331-7019 |
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1303 |
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Korneev, A.; Korneeva, Y.; Florya, I.; Semenov, A.; Goltsman, G. |
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Title |
Photon switching statistics in multistrip superconducting single-photon detectors |
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Journal Article |
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2018 |
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IEEE Trans. Appl. Supercond. |
Abbreviated Journal |
IEEE Trans. Appl. Supercond. |
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28 |
Issue |
7 |
Pages |
1-4 |
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Keywords |
SSPD, SNSPD |
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We study photon count statistics in superconducting single-photon detectors consisting of up to 70 narrow superconducting strips connected in parallel. Using interarrival time analysis, we demonstrate that our samples are operated in the “arm-trigger” regime and require up to seven subsequently absorbed photons to form a resistive state in the whole sample. We also performed numerical simulation of the light and dark count rates versus detector bias current, which are in good agreement with the experimental results. |
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1051-8223 |
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1304 |
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