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Superconducting detector of IR single-photons based on thin WSi films
Journal of Physics: Conference Series. 2016. Vol. 737. No. 012032. P. 1–9.
Seleznev V., Divochiy A., Vakhtomin Y., Morozov P., Золотов Ф. И., Vasil'ev D., Moiseev K., Malevannaya E., Smirnov K.
We have developed the deposition technology of WSi thin films 4 to 9 nm thick with high temperature values of superconducting transition (Tc~4 K). Based on deposed films there were produced nanostructures with indicative planar sizes ~100 nm, and the research revealed that even on nanoscale the films possess of high critical temperature values of the superconducting transition (Tc~3.3-3.7 К) which certifies high quality and homogeneity of the films created. The first experiments on creating superconducting single-photon detectors showed that the detectors‟ SDE (system detection efficiency) with increasing bias current (Ib) reaches a constant value of ~30% (for =1.55 micron) defined by infrared radiation absorption by the superconducting structure. To enhance radiation absorption by the superconductor there were created detectors with cavity structures which demonstrated a practically constant value of quantum efficiency >65% for bias currents Ib0.6Ic. The minimal dark counts level (DC) made 1 s-1 limited with background noise. Hence WSi is the most promising material for creating single-photon detectors with record SDE/DC ratio and noise equivalent power (NEP).
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Ponomarev A., Aleksandrov N., Plasma Physics Reports 2026 Vol. 52 No. 3 P. 367–378
An approximate method for calculating drift velocity and other kinetic coefficients of heavy ions
in a light gas is generalized to gaseous mixtures. Obtained equations are used to calculate the mobilities of
and ions, as well as rate constants for inelastic ion–molecule processes with these ions in helium with
small additions of O2 under an electric field. Calculated ...
Added: April 27, 2026
Domrin V. I., Malova H. V., V. Yu. Popov et al., Cosmic Research 2026 Vol. 64 No. 2 P. 238–252
During magnetospheric perturbations a relatively thin current sheet with thickness about several
proton gyroradii forms in the Earth’s magnetotail. In a framework of the kinetic model describing current
sheet thinning in the magnetotail, the processes of its formation are investigated depending on the normal
magnetic field magnitude which affects both the current sheet structure and particle dynamics within ...
Added: April 27, 2026
Tsareva O. O., Malova H. V., V. Yu. Popov et al., Plasma Physics Reports 2026 Vol. 52 No. 2 P. 179–185
The influence of asymmetry of plasma sources on the structure and spatial localization of a superthin
current sheet (STCS) supported by demagnetized electrons is studied using a self-consistent model. The
simulation takes into account the presence of a single plasma source in the northern hemisphere, which
makes the plasma flow asymmetric. It is demonstrated that the asymmetry of ...
Added: April 27, 2026
П.А.Беспалов, О.Н. Савина, Геомагнетизм и аэрономия 2025 Т. 65 № 5 С. 620–628
Several basic models of frequency dynamics in quasi-periodic VLF emissions with spectral form repetition
periods from 10 to 300 s are considered. In all cases, we are talking about manifestations of cyclotron instability
of electron radiation belts thet are well described within the framework of the plasma magnetospheric maser
theory based an the averaged self-consistent system of quasi-linear ...
Added: April 25, 2026
Bondarenko G.G., Fisher M. R., Kristya V. I., Bulletin of the Russian Academy of Sciences: Physics 2026 Vol. 90 No. 4 P. 572–576
A model of the cathode layer of a glow gas discharge with a thin dielectric film on a fraction of the
cathode’s working surface is formulated. It is shown that a glow discharge most rapidly transits to an arc discharge,
accompanied by a significant increase in discharge current density and a decrease in cathode voltage
drop, if the ...
Added: April 25, 2026
Ершов И. А., Системная инженерия и инфокоммуникации 2025 № 4 С. 11–14
The heat consumption of residential buildings is a stochastic series. It is necessary for the design of thermal energy regulators the creation of a neural network model. In the paper, the model is carried out based on Long Short-Term Memory (LSTM). The high accuracy of reproducing the series was achieved by training the model on ...
Added: April 22, 2026
Zadkov V., Plasmonics 2026 Vol. 21 P. 1503–1512
Plasmonic nanostructures typically exhibit shifts in their resonant wavelength in response to changes in the refractive index of the surrounding medium. This limits their applications in scenarios requiring stable optical resonances. Here we present a metallic-dielectric hybrid metasurface that exhibits stable multi-wavelength resonance even if the refractive index of its surrounding varies. To quantitatively evaluate the stability of ...
Added: April 22, 2026
Shchur L., Antonov D., Burovski E., International Journal of Bifurcation and Chaos in Applied Sciences and Engineering 2026 P. 1–9
We present a simple model that simulates the possible influence of one society on another. Specifically, two societies evolve deterministically according to the well-known Nowak-May spatial game with the addition of mutual influence through connections that reflect the current states of the societies. This may be related to the influence of a global information resource ...
Added: April 20, 2026
Qin X., Deng Y., Shchur L. et al., / Series arXiv "math". 2026. No. 2603.02962.
We perform a Monte Carlo analysis of the Ising model on many three-dimensional lattices. By means of finite-size scaling we obtain the critical points and determine the scaling dimensions. As expected, the critical exponents agree with the three-dimensional Ising universality class for all models. The irrelevant field, as revealed by the correction-to-scaling amplitudes, appears to ...
Added: April 20, 2026
Pilé I., Deng Y., Shchur L., / Series arXiv "math". 2026. No. 2604.10254.
We investigate the spatial overlap of successive spin configurations in Markov chain Monte Carlo simulations using the local Metropolis algorithm and the Svendsen-Wang and Wolff cluster algorithms. We examine the dynamics of these algorithms for two models in different universality classes: the Ising model and the Potts model with three components. The overlap of two ...
Added: April 20, 2026
Ebraheem A., Информационные процессы 2025 Т. 25 № 4 С. 787–798
The article proposes a method for planning the placement of access points and gateways inside buildings for constructing Internet of Things networks. The basis of the method is the use of information from a building information model, which makes it possible to easily take into account both the geometry and the physical and technical characteristics ...
Added: April 19, 2026
Kalikin N., Брандышев П. Е., Budkov Y., Journal of Chemical Physics 2026 Vol. 164 Article 154904
This study presents a mean-field theory for zwitterionic polymer solutions confined within attractive slit-like nanopores. Building upon our prior model for self-coacervation [Budkov et al., Soft Matter 19, 3281–3289 (2023)], we demonstrate that strong electrostatic dipole–dipole correlations between monomeric units, coupled with attraction to pore walls, can induce capillary-driven liquid–liquid phase separation inside the pore—a ...
Added: April 18, 2026
Moiseev E., Масютин Д. А., Мельниченко И. А. et al., Optics and Laser Technology 2025 Vol. 201 No. 115289 P. 1–5
Lasing at a wavelength near 255 nm is demonstrated in AlGaN whispering gallery mode microlasers with radii ranging from 1 to 3 µm fabricated on sapphire substrates, representing one of the shortest-wavelength realizations of microdisk lasers on this technologically relevant platform. The minimum threshold energy was 8.8 pJ (power density ≈ 280 kW/cm2) for a microlaser with a ...
Added: April 18, 2026
IEEE, 2025.
The themes for this year's conference were chosen as a means of bringing together academics and industrialists, engineering and management research, and providing a basis for discussion of issues arising across the engineering and business community in relation to Quality Management, Information Technologies, Digital Security aimed at developing engineers and managers for the future. The ...
Added: April 17, 2026
NY: Association for Computing Machinery (ACM), 2026.
This book consists of the proceedings of the extended abstracts of the 2026 CHI Conference on Human Factors in Computing Systems. ...
Added: April 14, 2026
A. V. Pereskokov, Theoretical and Mathematical Physics 2026 Vol. 226 No. 3 P. 470–484
We consider the spectral problem for a hydrogen atom in orthogonal electric and magnetic fields with
an additional self-consistent field. We obtain an asymptotic expansion of self-consistent energy levels.
We find an asymptotic expansion of asymptotic eigenfunctions near the sphere |q| = 2. We calculate the
asymptotics of their norm in the space L2(R3). ...
Added: April 12, 2026
Porokhov N. V., Dryazgov M. A., Shevchenko A. R. et al., Superconductor Science and Technology 2026 Vol. 39 No. 2 Article 025026
This work investigates the effect of a scandium nitride (ScN) buffer layer on the superconducting properties of niobium nitride (NbN) thin films. The use of a ScN buffer layer significantly improves the characteristics of 29 nm-thick NbN films: the critical temperature increases from 9 K to 12.5 K, while the resistivity at 20 K decreases from 330 µΩ·cm ...
Added: March 1, 2026
Таркаева Е. В., Иевлева В. А., Kuntsevich A. et al., Journal of Applied Physics 2025 Vol. 138 No. 12 Article 123904
We present electron beam evaporation of rhenium films on room-temperature substrates. The films are shown to be amorphous and achieve a record-high critical temperature for rhenium—exceeding 7 K at the midpoint of the transition—alongside a high critical current density of 5000 A/ mm2 and critical fields above 10 T. Terahertz spectroscopy reveals a Bardeen–Cooper–Schrieffer-like character of superconductivity with a zero-temperature ...
Added: October 5, 2025
Zavodilenko V. V., Losev A. V., Filyaev A. A. et al., Optoelectronics, Instrumentation and Data Processing 2023 Vol. 59 P. 148–155
Automated measuring stand (AMS) for evaluation of the operational parameters of single-photon detectors (SPD) has been developed together with the software that implements the method of evaluating SPD efficiency parameters from the experimental data measured with AMS. We present graphical interface of the software, which allows generating recommendations for configuring operation mode of the detector ...
Added: September 1, 2023
Losev A. V., Filyaev A. A., Zavodilenko V. V. et al., Journal of Russian Laser Research 2023 Vol. 44 P. 156–162
We construct a model of InGaAs/InAlAs single-photon avalanche diodes in the T-CAD computing environment, in order to predict their electrical parameters, when they work as a part of single-photon detectors. The obtained results are applicable for optimizing the design of single-photon avalanche photodiodes for the use as sensitive elements in light detection devices. The main ...
Added: May 16, 2023
Losev A., Zavodilenko V. V., Koziy A. et al., IEEE Journal of Quantum Electronics 2022 Vol. 58 No. 3 P. 1–11
We have performed a detailed study of the dependence of afterpulse probability in InGaAs/InP sine-gated SPAD on the dead time and the existing approach for its implementation. We demonstrated an electrical scheme combining sinusoidal gating and active reset. We have shown when such solutions are beneficial from the key distribution point of view, and enough ...
Added: May 12, 2023
Ilin A., Стругова А. О., Кон И. А. et al., В кн.: Нанофизика и наноэлектроника. Труды XXVII Международного симпозиума (Нижний Новгород, 13–16 марта 2023 г.) в 2х томах. Том 1Т. 1: Секции 1, 2, 4, 6.: Н. Новгород: ИПФ РАН, 2023. С. 105–106.
Обнаружена сверхпроводимость в пленках RuN, полученных методом реактивного магнетронного распыления. Критическая температура сверхпроводящего перехода составляет от 0,77 до 1,29 К, в зависимости от подложки. Определены параметры кристаллической решетки сверхпроводящих пленок: решетка кубическая с параметрами a = b = c = 4.5586 Å, a = b = g = 87.96°. Результаты измерения температурных зависимостей второго критического магнитного ...
Added: March 26, 2023
Baeva E., Maria D. Soldatenkova, Золотов Ф. И. et al., IEEE Transactions on Applied Superconductivity 2022 Vol. 32 No. 4 Article 7500505
Here we focus on thermal transport in NbN films, deposited on crystalline substrates. Using the noise thermometry, we found that thermal relaxation in thin NbN films at temperatures above the critical superconducting temperature is mainly restricted by the thermal boundary resistance, and it can be modified by a structural disorder on a substrate surface. In ...
Added: October 25, 2022
Pentin I., Seleznev V., Vakhtomin Y. et al., Scientific Reports 2020 Vol. 10 No. 1 P. 1–8
The paper presents the experimental results of studying the dynamics of electron energy relaxation in structures made of thin (d ≈ 6 nm) disordered superconducting vanadium nitride (VN) films converted to a resistive state by high-frequency radiation and transport current. Under conditions of quasi-equilibrium superconductivity and temperature range close to critical (~ Tc), a direct measurement of the energy ...
Added: December 10, 2020