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Investigation of the Effects of the Multiplication Area Shape on the Operational Parameters of InGaAs/InAlAs SPADs
Sensors. 2026. Vol. 26. No. 4. P. 1228.
A 2D model of an InGaAs/InAlAs single-photon avalanche photodiode has been developed. The influence of the active area structure in the multiplication region on the diode’s operating parameters has been studied. It was found that changing the diameter of the structure’s active region leads to a change in the dark current in the linear part of the current–voltage curve and a change in the breakdown voltage. Reducing the diameter of the active region from 25 μm to 10 μm allowed decreasing the dark current in the linear mode by about 10 dB. It has been shown that the quality of the SPAD device can be assessed by knowing the avalanche breakdown voltage and the overall current–voltage curve plot if we consider structures with the same multiplication region thickness and different remaining layers. The higher the breakdown voltage, the better the structure’s quality due to smaller local increases in the field strength. Following this statement, we conclude that for further use in single-photon detectors, it is reasonable to pick specific SPADs from a batch on the sole basis of their current–voltage curves.
Mosentsov S. N., Losev A. V., Zavodilenko V. V. et al., Фотоника 2023 Vol. 17 No. 2 P. 134–145
The article is devoted to the comparison of specifications of the single photon detectors manufactured by QRate (Russia) and ID Quantique (Switzerland). Their quantum efficiencies, dark count rates, and afterpulse probabilities have been examined in this work. The test results have showed the interchangeability of detectors and noncompliance of foreign detectors with the declared specifications ...
Added: May 6, 2026
Losev A. V., Filyaev A. A., Zavodilenko V. V. et al., St. Petersburg Polytechnical University Journal: Physics and Mathematics 2023 Vol. 16 No. 3.1 P. 459–462
A sine-gated single-photon detector (SPD) intended for use in a quantum key distribution (QKD) system is considered in this paper. An “avalanche delay” effect in the sine-gated SPD is revealed. This effect consists in the appearance of an avalanche triggered at the next gate after the photon arrival gate. It has been determined experimentally that ...
Added: May 6, 2026
Filyaev A. A., Losev A. V., Zavodilenko V. V. et al., St. Petersburg Polytechnical University Journal: Physics and Mathematics 2023 Vol. 16 No. 3.1 P. 237–241
In this paper an important parameter of single-photon detectors, such as quantum efficiency, is considered. Errors in determining this parameter lead to significant errors in the parameters of a quantum key distribution system, where such detectors find their application. Three models are proposed to estimate photon detection efficiency or quantum efficiency and their main advantages ...
Added: May 6, 2026
Zavodilenko V. V., Filyaev A. A., Losev A. V. et al., St. Petersburg Polytechnical University Journal: Physics and Mathematics 2023 Vol. 16 No. 3.1 P. 242–247
In this paper the influence of the multiplication area shape on the dark count rate (DCR) of InGaAs/InAlAs single-photon avalanche photodiodes (SPADs) is discussed. This study is carried out within the framework of SPAD design parameter optimization. The diode structure has been simulated in the T-CAD calculation environment. The structure with three levels of multiplication ...
Added: May 6, 2026
Didenkulova E., Flamarion M., Pelinovsky E., Physica D: Nonlinear Phenomena 2025 Vol. 481 Article 134815
A comparison of the statistical characteristics of a rarefied soliton gas is carried out within the framework of integrable and non-integrable equations from the Korteweg-de Vries (KdV) hierarchy. As examples, multi-soliton solutions of the modified KdV equation, and the modular Schamel equation are considered. A common property of the dynamics of bipolar solitons is the ...
Added: March 11, 2026
He Y., Slunyaev A., Mori N. et al., Physica D: Nonlinear Phenomena 2026 Vol. 488 Article 135098
Extreme wave localizations in nonlinear dispersive media, arising from modulation instability in weakly nonlinear
wave interactions, can be effectively modeled by breather solutions. These breathers are exact solutions
of the nonlinear Schrödinger equation and provide accurate models for understanding and controlling unidirectional
rogue wave dynamics in numerical simulations or laboratory settings. A recent study by Y. He et ...
Added: February 12, 2026
Perov G. A., Presnyakov S., Kasatkin A. et al., , in: 2025 Systems of Signal Synchronization, Generating and Processing in Telecommunications (SYNCHROINFO).: IEEE, 2025.
It is generally recognised that communication is one of the most important areas of technology. Moreover, the study and improvement of amplification devices operating in little-studied frequency ranges is an essential part of the modern communication development. This work is aimed at investigating the electrodynamic properties of modified designs of helix slow-wave systems, used in ...
Added: December 15, 2025
Flamarion M. V., E. Pelinovsky, E. Didenkulova, Physics of Wave Phenomena 2025 Vol. 33 No. 1 P. 9–19
The present paper is devoted to the study of the dynamics of narrowband wave fields within the
nonintegrable Schamel equation, which plays an important role in plasma physics, wave dynamics in metamaterials,
and electrical circuits. A Monte Carlo approach is used to obtain a large number of random independent
realizations of the wave fields, allowing for an investigation ...
Added: March 23, 2025
Kuznetsova A., Байдаков Г. А., Троицкая Ю. И., Izvestia, Atmospheric and Oceanic Physic 2024 Vol. 60 No. 3 P. 306–319
This paper provides an overview of a series of papers aimed at creating a regional model based on the WAVEWATCH III spectral wave model adapted to conditions of an inland water body using the WRF atmospheric model. The models are adapted and verified based on results of a series of full-scale experiments on studying the wind–wave ...
Added: December 6, 2024
R. K. Gaydukov, V. G. Danilov, Computational Mathematics and Mathematical Physics 2024 Vol. 64 No. 6 P. 1317–1325
Mathematical modeling of the ice–water phase transition during liquid flow inside a pipe
with a small ice buildup on the wall at high Reynolds numbers is considered. As a mathematical model
describing the dynamics of the phase transition, a double-deck boundary layer model and a phase field
system are used. Results of numerical simulation are presented. ...
Added: February 17, 2024
Gaydukov R., Russian Journal of Nonlinear Dynamics 2024 Vol. 20 No. 1 P. 113–125
The problem of flow of a non-Newtonian viscous fluid with power-law rheological properties
along a semi-infinite plate with a small localized irregularity on the surface is considered for large
Reynolds numbers. The asymptotic solution with double-deck structure of the boundary layer is
constructed. The numerical simulation of the flow in the region near the surface was performed
for different ...
Added: December 26, 2023
A. V. Slunyaev, Shrira V. I., Physics of Fluids 2023 Vol. 35 No. 12 Article 126606
Rogue waves are known to be much more common on jet currents. A possible explanation was put forward in Shrira and Slunyaev
[“Nonlinear dynamics of trapped waves on jet currents and rogue waves,” Phys. Rev. E 89, 041002(R) (2014)] for the waves trapped on
current robust long-lived envelope solitary waves localized in both horizontal directions become possible, ...
Added: December 20, 2023
Slunyaev A., Известия РАН. Физика атмосферы и океана 2023 Т. 59 С. 793–814
По результатам прямого численного моделирования нерегулярных нелинейных волн на поверхности глубокой воды в рамках трехмерных потенциальных уравнений гидродинамики определены
вклады различных волновых компонент (второй, третьей и разностной гармоник) в формирование
распределений вероятностей высот экстремальных волн, а также амплитуд гребней и ложбин. Проанализированы результаты моделирования с учетом 4- и 5-волновых нелинейных взаимодействий.
Разные нелинейные гармоники участвуют в формировании распределений ...
Added: December 20, 2023
Slunyaev A., Kokorina A., Physics of Fluids 2023 Vol. 35 No. 11 Article 117109
By means of the direct numerical simulation of directional waves on the surface of deep water, it is shown that extreme waves can exhibit
such asymmetry that the occurrence of deeper troughs is several times more likely on the wave rear slopes. This effect becomes most
pronounced in the case of steep short-crested waves. It is not ...
Added: December 20, 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
Didenkulova E., Талипова Т. Г., Диденкулов О. И., Экологические системы и приборы 2022 № 12 С. 55–64
The article presents the results of numerical simulation of the dynamics of solitary internal waves’ ensembles in a stratified (vertically inhomogeneous) ocean for hydrophysical conditions close to those on the Indian Ocean shelf. Ensembles of unipolar and bipolar solitons, as well as solitons and breathers with random amplitudes and phases are considerate. Estimates of the statistical characteristics of ...
Added: January 31, 2023
Chabchoub A., Slunyaev A., Hoffmann N. et al., Frontiers in Physics 2021 Vol. 9 Article 633549
Solitons are coherent structures that describe the nonlinear evolution of wave localizations in hydrodynamics, optics, plasma and Bose-Einstein condensates. While the Peregrine breather is known to amplify a single localized perturbation of a carrier wave of finite amplitude by a factor of three, there is a counterpart solution on zero background known as the degenerate ...
Added: August 25, 2021
Meirmanov A. M., Galtsev O. V., Lithuanian Mathematical Journal 2018 Vol. 58 P. 284–308
In the paper, we consider the evolution of the free boundary separating two immiscible viscous fluids with different constant densities in an absolutely rigid solid body and in an elastic skeleton. The motion of the liquids is described by the Stokes equations driven by the input pressure and the force of gravity. For flows in ...
Added: October 30, 2020
A.P.Tyutnev, V.S. Saenko, A.D. Zhadov et al., Polymer Science - Series A 2020 Vol. 62 No. 3 P. 300–306
Abstract—The electron transport is studied experimentally by measuring pulsed radiation-induced conductivity
in polyetheleneterephthalate under bulk irradiation of polymer films by fast electron pulses in a smallsignal
regime. Numerical simulation is performed using a multiple trapping model with an exponential energy
trap distribution. It is shown that, contrary to the reported interpretation of this phenomenon, there is no
electron extraction ...
Added: May 8, 2020
Shustov P., Kharlanov O., , in: EPJ Web of Conferences, Volume 201 (2019), The XXII International Scientific Conference of Young Scientists and Specialists (AYSS-2018)Vol. 201: The XXII International Scientific Conference of Young Scientists and Specialists (AYSS-2018).: EDP Sciences, 2019. P. 09006.
We study the effect of non-standard neutrino interactions (NSIs) on the growth of instabilities in neutrino energy spectra of a core-collapse supernova for different neutrino intensities and/or types of NSIs, notably including the exotic neutrino magnetic moment. Although it is usually attested that instabilities virtually smear out all potentially observable signatures, we show that, instead, ...
Added: February 10, 2020
EDP Sciences, 2019.
We study the effect of non-standard neutrino interactions (NSIs) on the growth of instabilities in neutrino energy spectra of a core-collapse supernova for different neutrino intensities and/or types of NSIs, notably including the exotic neutrino magnetic moment. Although it is usually attested that instabilities virtually smear out all potentially observable signatures, we show that, instead, ...
Added: February 10, 2020
Slunyaev A., Кокорина А. В., Water Waves, Springer 2019 P. 1–20
The issue of accounting of the wave breaking phenomenon in direct numerical simulations of oceanic waves is discussed. It is emphasized that this problem is crucial for the deterministic description of waves, and also for the dynamical calculation of extreme wave statistical characteristics, such as rogue wave height probability, asymmetry, etc. The conditions for accurate ...
Added: October 13, 2019