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Author |
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 |
Publication |
J. Phys.: Conf. Ser. |
Abbreviated Journal |
J. Phys.: Conf. Ser. |
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1410 |
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Pages |
012147 (1 to 5) |
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Keywords |
SSPD, SNSPD |
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Abstract |
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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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 |
Type |
Conference Article |
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Year |
2019 |
Publication |
J. Phys.: Conf. Ser. |
Abbreviated Journal |
J. Phys.: Conf. Ser. |
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1410 |
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012076 (1 to 5) |
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Keywords |
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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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 |
Type |
Conference Article |
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Year |
2019 |
Publication |
J. Phys.: Conf. Ser. |
Abbreviated Journal |
J. Phys.: Conf. Ser. |
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Volume |
1410 |
Issue |
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Pages |
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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1742-6588 |
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1273 |
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Rasulova, G. K.; Pentin, I. V.; Goltsman, G. N. |
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Title |
Terahertz emission from a weakly-coupled GaAs/AlGaAs superlattice biased into three different modes of current self-oscillations |
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Journal Article |
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Year |
2019 |
Publication |
AIP Advances |
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AIP Advances |
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9 |
Issue |
10 |
Pages |
105220 |
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Keywords |
GaAs/AlGaAs superlattice, SL, NbN HEB |
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Radio-frequency modulated terahertz (THz) emission power from weakly-coupled GaAs/AlGaAs superlattice (SL) has been increased by parallel connection of several SL mesas. Each SL mesa is a self-oscillator with its own oscillation frequency and mode. In coupled non-identical SL mesas biased at different voltages within the hysteresis loop the chaotic, quasiperiodic and frequency-locked modes of self-oscillations of current arise. THz emission was detected when three connected in parallel SL mesas were biased into the frequency-locked and quasiperiodic modes of self-oscillations of current, while in the chaotic mode of those it falls to the noise level. |
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2158-3226 |
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1274 |
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Author |
Elezov, M.; Ozhegov, R.; Goltsman, G.; Makarov, V. |
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Title |
Countermeasure against bright-light attack on superconducting nanowire single-photon detector in quantum key distribution |
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Journal Article |
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Year |
2019 |
Publication |
Opt. Express |
Abbreviated Journal |
Opt. Express |
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27 |
Issue |
21 |
Pages |
30979-30988 |
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Keywords |
SSPD, SNSPD |
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We present an active anti-latching system for superconducting nanowire single-photon detectors. We experimentally test it against a bright-light attack, previously used to compromise security of quantum key distribution. Although our system detects continuous blinding, the detector is shown to be partially blindable and controllable by specially tailored sequences of bright pulses. Improvements to the countermeasure are suggested. |
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English |
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1094-4087 |
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PMID:31684339 |
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1275 |
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