| Records |
| Author |
Chuprina, I. N.; An, P. P.; Zubkova, E. G.; Kovalyuk, V. V.; Kalachev, A. A.; Gol'tsman, G. N. |
| Title |
Optimisation of spontaneous four-wave mixing in a ring microcavity |
Type |
Conference Article |
| Year |
2017 |
Publication |
J. Phys.: Conf. Ser. |
Abbreviated Journal |
J. Phys.: Conf. Ser. |
| Volume |
47 |
Issue |
10 |
Pages |
887-891 |
Keywords  |
ring microcavity |
| Abstract |
Abstract. A theory of spontaneous four-wave mixing in a ring microcavity is developed. The rate of emission of biphotons for pulsed and monochromatic pumping with allowance for the disper- sion of group velocities is analytically calculated. In the first case, pulses in the form of an increasing exponential are considered, which are optimal for excitation of an individual resonator mode. The behaviour of the group velocity dispersion as a function of the width and height of the waveguide is studied for a specific case of a ring microcavity made of silicon nitride. The results of the numeri- cal calculation are in good agreement with the experimental data. The ring microcavity is made of two types of waveguides: com- pletely etched and half etched. It is found that the latter allow for better control over the parameters in the manufacturing process, making them more predictable. |
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RPLAB @ kovalyuk @ |
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1142 |
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Казаков, А. Ю.; Кардакова, А. И.; Селиверстов, С. В.; Горшков, К. Н.; Дивочий, А. В.; Финкель, М. И.; Корнеев, А. А.; Вахтомин, Ю. Б. |
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Возможность применения сверхпроводниковых материалов в качестве отражающего покрытия холодного зеркала телескопа субмиллиметрового диапазона |
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Journal Article |
| Year |
2012 |
Publication |
Совр. проб. науки и обр. |
Abbreviated Journal |
Совр. проб. науки и обр. |
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3 |
Pages |
1-5 |
| Keywords |
radio telescope, superconducting coating |
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russian |
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2070-7428 |
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УДК 520.272.2 |
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RPLAB @ sasha @ казаковвозможность |
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1030 |
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Kahl, O.; Ferrari, S.; Kovalyuk, V.; Vetter, A.; Lewes-Malandrakis, G.; Nebel, C.; Korneev, A.; Goltsman, G.; Pernice, W. |
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Spectrally multiplexed single-photon detection with hybrid superconducting nanophotonic circuits: supplementary material |
Type |
Miscellaneous |
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2017 |
Publication |
Optica |
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1-9 |
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Quantum detectors; Spectrometers and spectroscopic instrumentation; Nanophotonics and photonic crystals; Fluorescence correlation spectroscopy; Fluorescence resonance energy transfer; Fluorescence spectroscopy; Imaging techniques; Optical components; Quantum key distribution |
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This document provides supplementary information to “Spectrally multiplexed single-photon detection with hybrid superconducting nanophotonic circuits", DOI:10.1364/optica.4.000557. Here we detail the on-chip spectrometer design, its characterization and the experimental setup we used. In addition, we present a detailed report concerning the characterization of the superconducting nanowire single photon detectors. In the final sections, we describe sample preparation and characterization of the nanodiamonds containing silicon vacancy color centers. |
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Osa |
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Kahl:17 |
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1218 |
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Semenov, A.; Goltsman, G.; Korneev, A. |
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Quantum detection by current carrying superconducting film |
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Journal Article |
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2001 |
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Phys. C: Supercond. |
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Phys. C: Supercond. |
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351 |
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4 |
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349-356 |
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quantum detection, phase slip centers, quasiparticle diffusion |
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We describe a novel quantum detection mechanism in the superconducting film carrying supercurrent. The mechanism incorporates growing normal domain and breaking of superconductivity by the bias current. A single photon absorbed in the film creates transient normal spot that causes redistribution of the current and, consequently, increase of the current density in superconducting areas. When the current density exceeds the critical value, the film switches into resistive state and generates the voltage pulse. Analysis shows that a submicron-wide film of conventional low temperature superconductor operated in liquid helium may detect single far-infrared photon. The amplitude and duration of the voltage pulse are in the millivolt and picosecond range, respectively. The quantitative model is presented that allows simulation of the detector utilizing this detection mechanism. |
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0921-4534 |
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no |
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507 |
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Elezov, M. S.; Ozhegov, R. V.; Goltsman, G. N.; Makarov, V.; Vinogradov, E. A.; Naumov, A. V.; Gladush, M. G.; Karimullin, K. R. |
| Title |
Development of the experimental setup for investigation of latching of superconducting single-photon detector caused by blinding attack on the quantum key distribution system |
Type |
Conference Article |
| Year |
2017 |
Publication |
EPJ Web Conf. |
Abbreviated Journal |
EPJ Web Conf. |
| Volume |
132 |
Issue |
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Pages |
01004 (1 to 2) |
| Keywords |
QKD, SSPD, SNSPD |
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Recently bright-light control of the SSPD has been demonstrated. This attack employed a “backdoor” in the detector biasing scheme. Under bright-light illumination, SSPD becomes resistive and remains “latched” in the resistive state even when the light is switched off. While the SSPD is latched, Eve can simulate SSPD single-photon response by sending strong light pulses, thus deceiving Bob. We developed the experimental setup for investigation of a dependence on latching threshold of SSPD on optical pulse length and peak power. By knowing latching threshold it is possible to understand essential requirements for development countermeasures against blinding attack on quantum key distribution system with SSPDs. |
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2100-014X |
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no |
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1327 |
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