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Performance of microheaters for tunable on-chip interferometer
Journal of Physics: Conference Series. 2021. Vol. 2086. No. 1. P. 1–4.
Venediktov I. O., Elezov M. S., Prokhodtsov A. I., Kovalyuk V. V., An P. P., Golikov A. D., Shcherbatenko M. L., Sych D., Goltsman G.
Mach-Zehnder interferometer (MZI) is a valuable practical tool in many optical science areas. In particular, high-contrast MZI are required for experimental realization of displacement-based quantum receivers that can discriminate weak coherent states of light with the minimum error rate. In this work we study phase modulators of tunable on-chip interferometer on silicon nitride (Si3N4) platform for telecom wavelength (1550 nm) consisting of several MZI. Phase modulators on one of the arms of MZI consists of microheaters and waveguide. Microheaters heat waveguides changing its refractive index due to thermo-optical effect providing a phase shift. We measure the bandwidth of phase modulators and study their operation in pulse mode.
Dmitriev A., Kornilov V., Batienkov R., Lecture Notes in Civil Engineering 2026 Vol. 886 P. 249–255
Numerous studies have provided compelling evidence that the probability distribution of avalanche sizes follows a power law, and that 1/f noise is present in the stochastic dynamics of landslides. We present a theoretical explanation of these phenomena within the framework of self-organized criticality theory, proposing a discrete-time model in the form of a sandpile cellular ...
Added: October 13, 2026
Dmitriev A., Shulman I., Lebedev A., Studies in Computational Intelligence 2026 Vol. 1265 P. 266–273
A discrete-time model is presented for the self-organization of the X/Twitter social network to the edge of a phase transition, characterized by avalanche-like propagation of information in the network. The model is based on the analogy between the critical dynamics of the X social network and sandpile cellular automata with Manna rule on the Chung-Lu ...
Added: October 13, 2026
Arutyunov K., Kharitonov I. A., Petrosyants K. O., JETP Letters 2026 Vol. 124 No. 6 P. 1–16
Superconducting properties of metallic micro- and nanowires can be entirely different from those of bulk superconductors. Of particular interest is the nonequilibrium current-induced state of a quasi-one-dimensional superconducting channel. The most interesting phenomenon here is the stepped I–V characteristic, explained by a process known as phase slip center activation. If the origin of such step-like ...
Added: October 13, 2026
Makarov D. M., Kalikin N., Fashchevsky K. A. et al., Electrochimica Acta 2026 Vol. 579 Article 150159
Machine learning (ML) has become a powerful tool for accelerating the development of carbon-based supercapacitors;
however, most published models assume that a single predictive framework can describe both conventional
porous carbons and hybrid carbon electrodes. Here, we test this assumption using a comprehensive
benchmark dataset and an extended literature-curated dataset enriched with synthesis- and electrolyte-related
descriptors. Three ML algorithms ...
Added: October 13, 2026
Махлуф М., Ozhegov R., Elezov M. et al., Фотоника 2026 Vol. 20 No. 6 P. 414–423
This paper compares the ranging precision of direct time-of-flight (dToF) and non-line-of-sight (NLOS) LiDAR architectures, both using a superconducting nanowire single-photon detector (SNSPD). Both systems operate at 1550 nm with a 50 ps pulsed laser and time-correlated single-photon counting (TCSPC). The dToF configuration achieved approximately 100 µm precision at 10 m, while the NLOS configuration achieved 500 µm precision for ...
Added: October 12, 2026
Singapore: Springer, 2026.
This volume presents the Proceedings of the 34th IUPAP Conference on Computational Physics (CCP2023), held in Kobe, Japan on August 4–8, 2023. It offers a collection of peer-reviewed articles that highlight recent developments in computational and simulation research across various areas of physics. Key topics include the use of data science, quantum computing, and machine ...
Added: October 12, 2026
Goncharov A., Chibisov A., Advanced Theory and Simulations 2023 Vol. 12 No. 13 Article 2200816
Designing stable quantum computers with the ability to correct errors responsibly requires a detailed understanding of the physical processes that underlie these devices. In this study, detailed quantum mechanical simulations of the atomic structure, charge distribution of electron density, and distribution and orientation of magnetic and quantum states as a function of applied external pressure ...
Added: October 11, 2026
Chibisov A., Gnidenko A., Chibisova M. et al., FlatChem 2023 Vol. 41 Article 100533
Manufacturing precise quantum computers with small errors in quantum operations, long coherence times, and low power consumption is the most important challenge in modern nanoelectronics. To understand the operating modes of such calculators in detail, both the optimal arrangement of the qubit system within the structure and changes in its magnetic properties must be comprehensively ...
Added: October 11, 2026
Касимов Р. Х., Аржанов А. И., Седых К. О. et al., Оптический журнал 2026 Т. 93 № 1 С. 80–86
Предмет исследования. Использование метода капельного нанесения для изготовления источника одиночных фотонов. Цель работы. Разработка технологического процесса изготовления источника одиночных фотонов на коллоидных квантовых точках для использования их в фотон- ных интегральных схемах. Метод. На первом этапе в программе ANSYS Lumerical рассчитыва- ются период и фактор заполнения фокусирующих элементов связи на длинах волн 545 и 600 ...
Added: July 31, 2026
Кобцев Д. М., Венедиктов И. О., Svaytodukh S. S. et al., Наноиндустрия 2025 Т. 18 № S12-1 С. 82–89
The paper presents a fabricated integrated electro-optical modulator based on a ring resonator made of thin-film lithium niobate with a loaded Q factor of 2×104, a modulation depth of 0.96 dB/V and a response time of 3.9 GHz, promising for applications in the field of radio photonics and quantum optics. ...
Added: December 1, 2025
Венедиктов И. О., Kovalyuk V., Ан П. П. et al., Журнал технической физики 2024 Т. 94 № 7 С. 1158–1165
This work presents a superconducting single-photon detector with photon number resolution based on integrated optics on a silicon nitride platform for a wavelength of 914 nm. The detector is based on a space-time multiplexing scheme and consists of a plurality of pixel detectors connected in series by a microstrip line, which acts as a delay ...
Added: September 6, 2024
Lazarenko P., Kovalyuk V., An P. et al., Acta Materialia 2022 Vol. 234 Article 117994
In the past years, Ge2Sb2Te5 has been considered a promising functional material for a variety of reconfigurable multilevel devices, including photonic integrated circuits for the post-von Neumann arithmetic processing. However, despite significant advances, it is necessary to reduce the switching energy of Ge2Sb2Te5 for creation of the on-chip low power all-photonic spiking neural networks. The ...
Added: October 25, 2022
Komrakova S., An P., Kovalyuk V. et al., Journal of Physics: Conference Series 2021 Vol. 2086 No. 1 P. 1–4
Here, thermo-optical properties of hybrid nanophotonic circuits SWCNTs/SiN were investigated by studying the temperature dependence of the resonance wavelengths. After experimental and theoretical study, we found the thermo-optical coefficient of SWCNTs film is equal to 2.02 10-6 RIU/0C. ...
Added: February 15, 2022
Elmanova A., Elmanov I., An P. et al., Journal of Physics: Conference Series 2021 Vol. 2086 No. 1 P. 1–4
In this work we studied how focusing grating couplers, developed for telecommunication C-band wavelength range, can be applied in the near infrared range. In the paper we presented prospects of usage of both first and second diffraction maxima of theoretically computed diffraction grating couplers for photonic aims. The dependence of the central wavelength of the ...
Added: February 15, 2022
Тронев А. В., Парфенов М. В., Соломонов Н. А. et al., Письма в Журнал технической физики 2020 Т. 46 № 17 С. 51–54
Показано, что лазерная модификация нанометровой титановой пленки может быть использована для точно-го управления уровнем потерь в оптических волноводах на подложках ниобата лития. Теоретические оценкиизменения погонных потерь на уровне 0.95 dB/mm подтверждены экспериментами по локальной лазерноймодификации с использованием излучения на длине волны 976 nm с пороговой интенсивностью 1 kW/mm2.Предложенная методика может быть эффективно использованадля прецизионной подгонки ...
Added: December 5, 2020
Kuzin A., В кн.: Межвузовская научно-техническая конференция студентов, аспирантов и молодых специалистов им. Е.В. Арменского.: М.: МИЭМ НИУ ВШЭ, 2019. С. 184–185.
Данная работа посвящена моделированию оптического брэгговского фильтра для видимого диапазона на чипе. С применением моделирования получены основные характеристики брэгговского фильтра для видимого диапазона: центральная длина волны, коэффициент пропускания, полуширина вырезаемой мощности от геометрических размеров и количество периодов. Сделаны соответствующие выводы зависимости физических параметров брэгговского фильтра от геометрических, которые качественно совпадают с экспериментально полученными данными. ...
Added: May 22, 2019
Kahl O., Ferrari S., Kovalyuk V. et al., Optica 2017 Vol. 4 No. 5 P. 557–562
The detection of individual photons by superconducting nanowire single-photon detectors is an inherently binary mechanism, revealing either their absence or presence while concealing their spectral information. For multicolor imaging techniques, such as single-photon spectroscopy, fluorescence resonance energy transfer microscopy, and fluorescence correlation spectroscopy, wavelength discrimination is essential and mandates spectral separation prior to detection. Here, ...
Added: October 18, 2017
Ferrari S., Kovalyuk V., Hartmann W. et al., Optics Express 2017 Vol. 25 No. 8 P. 8739–8750
We investigate how the bias current affects the hot-spot relaxation dynamics in niobium nitride. We use for this purpose a near-infrared pump-probe technique on a waveguide-integrated superconducting nanowire single-photon detector driven in the two-photon regime. We observe a strong increase in the picosecond relaxation time for higher bias currents. A minimum relaxation time of (22 ...
Added: June 6, 2017
Rath P., Vetter A., Kovalyuk V. et al., , in: Proceedings of SPIE - The International Society for Optical Engineering. San Francisco, California, United States | February 13, 2016Т. 9750: Integrated Optics: Devices, Materials, and Technologies XX.: Беллингхем: Society of Photo-Optical Instrumentation Engineers, 2016. P. 97500T-1– 97500T-8.
We report on the design, fabrication and measurement of travelling-wave superconducting nanowire single-photon detectors (SNSPDs) integrated with polycrystalline diamond photonic circuits. We analyze their performance both in the near-infrared wavelength regime around 1600 nm and at 765 nm. Near-IR detection is important for compatibility with the telecommunication infrastructure, while operation in the visible wavelength range ...
Added: October 29, 2016
Kovalyuk V., Hartmann W., Kahl O. et al., Optics Express 2013 Vol. 21 No. 19 P. 22683–22692
We investigate the absorption properties of U-shaped niobium nitride (NbN) nanowires atop nanophotonic circuits. Nanowires as narrow as 20nm are realized in direct contact with Si3N4 waveguides and their absorption properties are extracted through balanced measurements. We perform a full characterization of the absorption coefficient in dependence of length, width and separation of the fabricated ...
Added: March 13, 2014