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Dark Counts Studied with Spatial Resolution, IEEE Transactions on Applied Superconductivity
IEEE Transactions on Applied Superconductivity. 2023. P. 1–5.
Goltsman G., Александр С.
We investigate dark counts in SNSPD with spatial resolution, using nanostrip-patterned devices with 50 Ohm matched coplanar waveguide - tapers. We found that the dark counts originate from one or several points along the strip, which we call 'weak points'. We found that the dark counts originating from different points can have different dependence of the rate on the temperature, such as the point which makes the main contribution to the dark counts rate at low temperature, makes just a minor contribution or even disappears at higher temperature. We explain this in terms of different realizations of random local environments of different ‘weak points’. Then we tilt the distribution of supercurrent density with a weak perpendicular magnetic field and find that the evolution of count rates generated at different ‘weak points’ is consistent with the suggestion that these ‘weak points’ are located at the edges of the strip. All our findings agree with the picture of fluctuating vortex entry through the minima of the order parameter at the edge of the strip as the origin of dark counts in SNSPD.
D. Sevryukov, Khmelev A., Merzlinkin V. et al., Russian Microelectronics 2025 Vol. 54 No. 8 P. 1422–1428
Optical satellite communication uses laser radiation to transmit information instead of the classical
radio frequency range. Laser communication is characterized by better performance due to higher carrier
frequency and less power consumption. PIN, avalanche, and superconducting single-photon detectors
(SSPD) can be used to receive optical signals. In this paper, we describe an automatic optical power control
(AOPC) system that ...
Added: March 24, 2026
Korneeva Y. P., Dryazgov M. A., Trofimov I. V. et al., Superconductor Science and Technology 2025 Vol. 38 No. 7 Article 075016
This work demonstrates that depositing a thin layer of Mo (5–15 nm) onto a 10 nm thick NbN strip leads to a significant increase in the nonlinearity of the kinetic inductance . Specifically, the change in with increasing current reached 70% in the NbN/Mo bilayer at liquid helium temperature, whereas in the NbN strip, changed by only 10% ...
Added: March 1, 2026
Pavlov I. N., A. I. Lomakin, S. S. Svyatodukh et al., Journal of Superconductivity and Novel Magnetism 2026 Vol. 39 Article 12
This study investigates the superconducting properties of MoRe films deposited by DC magnetron sputtering with a composite target consisting of 56 at.% Mo and 44 at.% Re on sapphire substrates at room temperature. All films are passivated with a silicon capping layer. The focus of this study is on the thickness dependence of the critical ...
Added: December 24, 2025
Nazarov G., Khudchenko A., Tretyakov I. et al., IEEE JOURNAL OF MICROWAVES 2024 P. 214–217
In this work we have measured the frequency response of a heterodyne receiver based on a mixer at the Superconductor-Insulator-Superconductor (SIS) tunnel junction for the frequency range 211–275 GHz. The measurement was done with a Fourier spectrometer using two methods of reading the detector signal: by direct current and by the power of the intermediate ...
Added: December 23, 2025
Korneeva Y. P., Dryazgov M. A., Porokhov N. V. et al., Superconductor Science and Technology 2024 Vol. 37 No. 10 Article 105009
Wepresent a study of thin-film Mo resistors for NbN electronics operating at cryogenic temperatures. The key step is the 0.5–1.5 keV ion cleaning–activation of NbN before Mo deposition, which allows us to obtain a high-quality Mo/NbN interface. This, together with an additional Al bandage layer in the area of the contact pads, allows us to ...
Added: March 17, 2025
Kolokolov I., Lebedev V., Журнал экспериментальной и теоретической физики 2024 Т. 165 № 1 С. 128–140
We examine fluctuations of vorticity excited by an external random force in two-dimensional fluid in the presence of a strong external shear flow. The problem is motivated by the analysis of big coherent vortices appearing as a consequence of the inverse energy cascade in a finite box at large Reynolds numbers. We develop the perturbation ...
Added: January 29, 2024
Mikhail Dryazgov, Korneeva Y., Alexander Korneev, AIP Conference Proceedings 2023 Vol. 2872 No. 1 Article 040001
Superconducting single photon detectors (SSPD or SNSPD) are excellent for detecting single photons. The principle of their operation is based on a local violation of superconductivity as a result of an absorbed photon, the formation of a hot spot with a normal domain, followed by a voltage pulse. Recent studies show that SSPDs based on ...
Added: October 30, 2023
Andriyakhina E. S., Apostoloff S., Burmistrov I. S., JETP Letters 2022 Vol. 116 No. 11 P. 825–830
In this paper we study repulsion of a Néel-type skyrmion in a chiral ferromagnetic film from a superconducting Pearl vortex due to the stray fields. Taking into account an effect of the vortex magnetic field on the skyrmion non-perturbatively, we find that the repulsion between them is suppressed with increase in the dimensionless strength of ...
Added: February 6, 2023
E. S. Pikina, Muratov A. R., Kats E. I. et al., Annals of Physics, Elsevier 2022 Vol. 447 Article 168916
The aim of this work is to revisit the phenomenological theory of the interaction between membrane inclusions, mediated by the membrane fluctuations. We consider the case where the inclusions are separated by distances larger than their characteristic size. Within our macroscopic approach a physical nature of such inclusions is not essential, however
we have always in ...
Added: October 28, 2022
Лигер В. В., Mironenko V., Курицын Ю. А. et al., Квантовая электроника 2022 Т. 52 № 9 С. 831–837
Разработан новый вариант метода диодной лазерной абсорбционной спектроскопии (ДЛАС) для определения температуры горячих зон. Метод основан на комбинации медленного сканирования частоты излучения зондирующего диодного лазера в окрестности линии поглощения тестовой молекулы среды и быстрой модуляции частоты излучения с амплитудой порядка ширины линии поглощения. Особенностью метода является использование двухлучевой дифференциальной схемы, логарифмическое преобразование сигналов и регистрация ...
Added: October 26, 2022
Mamontov A. V., Nefedov V. N., Khritkin S. A., Измерительная техника 2022 № 6 С. 46–51
The actual problem of accelerating and reducing the energy costs of the sheet polymer composite material heat treatment technological process is considered. It is shown that to solve this problem, it is advisable to use the microwave radiation energy as a heating source. The main advantages of the microwave method of the sheet polymer composite ...
Added: October 24, 2022
Parfenyev V., Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 2022 Vol. 106 No. 2 Article 025102
It is well known that an inverse turbulent cascade in a finite ($2 \pi \times 2 \pi$) two-dimensional periodic domain leads to the emergence of a system-sized coherent vortex dipole. We report a numerical hyperviscous study of the spatial vorticity profile inside one of the vortices. The exciting force was shortly correlated in time, random ...
Added: August 10, 2022
I. A. Gayduchenko, An P., V. Belosevich et al., , in: 2022 Photonics & Electromagnetics Research Symposium (PIERS).: IEEE, 2022. P. 904–907.
Here, we report on our recent efforts to develop of a photodetector based on single-layer graphene two-terminal device on the sapphire substrate. Our detector operates at 1.55μm, which corresponds to the telecom window. We have demonstrated that our detector operates under zero bias conditions at room temperature, and the signal-to-noise ratio reaches 45dB. The measured frequency ...
Added: August 4, 2022
Mamontov A. V., Nefedov V. N., Nazarov I. et al., Measurement Techniques 2021 Vol. 64 No. 4 P. 314–318
This paper addresses the high-priority goal of reducing the energy cost of heat-treating foam concrete slabs. We show that this problem is best solved using microwaves as a heat source. We discuss the main advantages of microwave curing over traditional techniques for curing foam concrete slabs, and develop a design for a microwave foam concrete ...
Added: October 16, 2021
Rano D., Yelizarov A., Skuridin A. et al., , in: 2021 15th European Conference on Antennas and Propagation (EuCAP).: IEEE, 2021. P. 1–5.
Added: September 30, 2021
Konstantin O. Petrosyants, Nikita I. Ryabov, , in: 2020 26th International Workshop on Thermal Investigations of ICs and Systems (THERMINIC).: IEEE, 2020. P. 1–7.
Multi-chip embedded PCBs were in resent years the mainstream technology of electronic packaging size reduction and at the same time providing improved performance. Ultra-small package size obviously strongly impacts the SiP module thermal behaviour. Unfortunately the complete thermal design methodology was not developed for this technology till now. In this work the problem of thermal ...
Added: June 5, 2021
Ismail-zade M. R., Petrosyants K. O., Sambursky L. M. et al., , in: 2020 26th International Workshop on Thermal Investigations of ICs and Systems (THERMINIC).: IEEE, 2020. P. 97–103.
A set of modified compact SPICE models of various flavours of MOSFETs (fabricated by bulk, SOI and SOS technologies) is presented for circuit simulation in the deep-cryogenic temperature range down to 4 K, which is important for space applications and development of scalable quantum computers. All models are constructed using the approach combining macromodeling based ...
Added: June 5, 2021
Baksheeva K., Ozhegov R., Goltsman G. et al., IEEE Transactions on Terahertz Science and Technology 2021 Vol. 11 No. 4 P. 381–388
We present evidence that in the sub-THz frequency band, human skin can be considered as an electromagnetic bio-metamaterial, in that its natural emission is a product of skin tissue geometry and embedded structures. Radiometry was performed on 32 human subjects from 480 to 700 GHz. Concurrently, the subjects were exposed to stress, while heart pulse ...
Added: May 28, 2021
Mamontov A. V., Nefedov V. N., Nazarov I. et al., Измерительная техника 2021 № 4 С. 44–48
The actual problem of accelerating and reducing the energy costs of the foam concrete slabs heat treatment technological process is considered. It is shown that to solve this problem, it is advisable to use the microwave radiation energy as a heat source. The main advantages of the microwave method of foam concrete slabs heat treatment ...
Added: May 15, 2021
Nefedov V. N., Measurement Techniques 2019 Vol. 62 No. 5 P. 449–454
A method for the construction of microwave devices with longitudinal interaction is proposed. Devices of the present type create uniform cross-sectional distribution of temperature of rods made of polymer composite materials. Results from theoretical and experimental investigations of the cross-sectional distribution of the temperature of the material of the rod as well as the parameters ...
Added: December 2, 2019
Baksheeva K. A., Ozhegov R., Goltsman G. et al., , in: 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz).: IEEE, 2019. P. 1–2.
Radiometry experiments, performed on human subjects, show that in the vicinity of a central frequency of 507 GHz the emission of the human skin is substantially nonequilibrium in its nature. The intensity of the radiation registered using a superconducting integrated receiver (SIR) [1], was correlated with the level of the physical and mental stress of ...
Added: October 23, 2019
Mamontov A. V., Nefedov V. N., Khritkin S. A., Measurement Techniques 2019 Vol. 62 No. 4 P. 365–370
We propose a method for designing transversely illuminated traveling-wave microwave devices. Devices of this type produce a uniform 3D temperature distribution in a polymer-composite rod. We describe theoretical and experimental results from studies of the 3D temperature distribution in the rod, along with the advantages of microwave curing technology over traditional curing techniques for polymer ...
Added: September 9, 2019
Guimarães R. R., Passos L., Filho R. H. et al., IEEE Network 2019 Vol. 33 No. 2 P. 126–131
Distinguishing outliers from normal data in wireless sensor networks has been a big challenge in the anomaly detection domain, mostly due to the nature of the anomalies, such as software or hardware failures, reading errors or malicious attacks, just to name a few. In this article, we introduce an anomaly detection-based OPF classifier in the ...
Added: December 19, 2018