?
Microfluidic–nanophotonic sensor for on-chip analysis of complex refractive index
Applied Physics Letters. 2024. Vol. 124. No. 6. Article 063701.
A. Kuzin, Panda K., Chernyshev V., Florya I., V. Kovalyuk, An P., Golikov A., G. Chulkova, Kolesov D., Gorin D., G. Goltsman
Photonic biosensors based on photonic integrated circuits (PICs) and microfluidic channels (MFCs) have become the subject of intensive research for point-of-care (POC) device applications. In the presented work, we demonstrate the possibility of identifying the complex refractive index (RI) of analyzed liquids through the optimization of the geometry configuration of MFCs under PICs by experimental and numerical approaches. Our results suggest that the real and imaginary parts of the RI for analytes under study can be determined from spectrum of devices with optimized MFCs width. This work paves the way for new opportunities to identify the presence and concentration of biological markers by using RI sensors for in situ POC applications.
Zirnik G., Ostovari Moghaddam A., Zhukov S. et al., Journal of Materials Science: Materials in Electronics 2026 Vol. 37 Article 738
In regards to the advances in InGaZnO for flexible transistors applications, herein for the first time we measure the broadband radio-frequency range (10 Hz to 1 MHz) dielectric permittivity ε′ and electrical conductivity σ of InGaZnO4 nanoparticle layers at different temperatures ranging from 10 to 300 K. The InGaZnO4 nanoparticles prepared by metal–nitrate–glycol gel decomposition method exhibited ...
Added: June 6, 2026
Flamarion M. V., Pelinovsky E., Nonlinear Dynamics 2026 Vol. 114 Article 784
In this article, we investigate wave packet and solitary wave dynamics in the Whitham–Ostrovsky (WO) equation. By means of a multiple-scales expansion, we formally derive a nonlinear Schrödinger (NLS) equation governing the envelope evolution.The corresponding modulational stability diagram is then obtained using the Lighthill criterion. We show that sufficiently large values of the low-frequency dispersive term render ...
Added: June 5, 2026
Hazarika A. P., Das A., Das S. K. et al., Physica B: Condensed Matter 2026 Vol. 738 Article 418803
Lemon grass (Cymbopogon citratus, LG-SiO2), horsetail (Equisetum debile, SG-SiO2), and cassava leaves (Manihot esculenta, CL-SiO2) were used to green-synthesize silica (SiO2) nanoparticles (NPs). While LG-SiO2 and SG-SiO2 had strong (101) peaks and a large 22° amorphous peak, XRD of CL-SiO2 verified crystallinity. LG-SiO2 (agglomerated porous), SG-SiO2 (rectangular-cube agglomerates), and CL-SiO2 (flake agglomerates) had different morphologies. The TEM image of LG-SiO2 revealed agglomerated ...
Added: June 4, 2026
Kornbleuth M., Opher M., Drake J. F. et al., Astrophysical Journal 2026 Vol. 1004 No. 1 Article 1
The shape of the heliosphere, regarded as comet-like since the 1960s, has recently been the subject of intense debate in the last decade. There is disagreement as to whether the heliospheric tail extends to ∼10,000 au in a comet-like shape or if it is short (∼400 au) with a split. Energetic neutral atom (ENA) maps from ...
Added: June 3, 2026
Kartsev A., Nishant T., Saswata G. et al., Journal of Materials Chemistry C 2026 Article -
Overheating remains a critical limitation in high-performance electronic and computing systems,
necessitating the development of efficient thermal management fluids. In this work, a magnetically
responsive hybrid ferrofluid was developed by incorporating two-dimensional hexagonal boron nitride
(2D-hBN) nanosheets into a Mn–Zn–ferrite-based ferrofluid. The hybrid system retains magnetic
responsiveness while leveraging the high in-plane thermal conductivity and chemical stability of 2D-hBN
nanosheets. ...
Added: June 2, 2026
Fortuna A. S., A.I. Kartsev, Gorshenkov M. V. et al., Journal of Alloys and Compounds 2026 Vol. 1070 Article 188711
The τ-phase in Mn-Al-Ga alloys is a promising candidate for rare-earth-free permanent magnets. This study re-veals that the τ(γ₂)-phase in rapidly quenched Mn55Al36Ga9 ribbons contains a high density of dislocations, which
form antiphase boundaries (APBs). Using transmission electron microscopy and density functional theory, we
demonstrate that Mn atoms at these APBs couple antiferromagnetically. This antiferromagnetic interaction is
identified ...
Added: June 2, 2026
Dikhtievskaya K., Argunov E., Карцев А. И. et al., The Journal of Physical Chemistry Letters 2026 Vol. 17 No. 17 P. 4999–5004
In this study we revealed the effect of scandium doping on the electronic and superconducting properties of the MgB2 compound. Calculations demonstrate that Sc substitutes for Mg atoms, acting as an electron donor. Mg substitution diminishes the density of states in the σ-band and attenuates the electron–phonon coupling, thereby elucidating the reduction in critical temperature. Simultaneously, ...
Added: June 2, 2026
Duran E. ., Pulgar A., Izquierdo R. et al., Physica Status Solidi (A) Applications and Materials 2026 Vol. 223 No. 7 Article e202500942
Ceramic superconductors exhibit remarkable properties, including zero electrical resistance and potent magnetic behavior, operating at temperatures as high as the boiling points of liquid nitrogen (77 K) and liquid hydrogen (20 K). These characteristics position them as key enablers for sustainable technologies spanning electric propulsion, lossless energy transmission, advanced medical imaging, and quantum computation. This review presents ...
Added: June 1, 2026
Borisov V., Danilov V., Электросвязь 2025 № 12 С. 73–84
Представлены результаты математического моделирования процесса полевой эмиссии из катода малых размеров – одного из основных физических процессов, обеспечивающих работы многих электронных устройств, в частности FED-дисплеев (устройства, работающие на принципе полевой эмиссии), кантилеверов и т.д. Дается краткий обзор текущих результатов в области исследования, обосновывается актуальность задачи, приводятся примеры наиболее вероятного использования результатов решения задачи. Обсуждаются физические ...
Added: May 29, 2026
Jiang Q., Fang J., Chen J. et al., Science China Information Sciences 2026 Vol. 69 No. 6 Article 162402
Resonators based on nanoelectromechanical systems (NEMS) using two-dimensional (2D) materials with high-quality factors and excellent electrical control are critical for tunable coherent phonon dynamics, resonant sensors and wireless communications. However, their performance is fundamentally limited by the lack of a unified framework governing energy dissipation mechanisms and their electrical tunability. Here, we synergistically modulate both ...
Added: May 28, 2026
Elesin L., Shilov A., Jana S. et al., Advanced Functional Materials 2026 P. 1–10
Thermoelectric materials, long explored for energy harvesting and thermal sensing, convert heat directly into electrical signals. Extending their application to the terahertz (THz) frequency range opens opportunities for low-noise, bias-free THz detection, yet conventional thermoelectrics lack the sensitivity required for practical devices. Thermoelectric coefficients can be strongly enhanced near van Hove singularities (VHS), though these ...
Added: May 28, 2026
Degtyarev A., Bakhurin S., Yudin N., DSPA 2026 P. 1–6
This paper investigates one possible solution to the problem of self-interference cancellation (SIC) arising in the design of in-band full-duplex (IBFD) communication systems. Self-interference cancellation is performed in the digital domain using multilayer nonlinear models adapted via gradient-based optimization. The presence of local minima and saddle points during the adaptation of multilayer models limits the ...
Added: May 26, 2026
Qian X., Deng Y., Lev N. Shchur et al., Physica A: Statistical Mechanics and its Applications 2026 Vol. 696 Article 131679
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: May 24, 2026
Melentiev P. N., Калмыков А. С., Гритченко А. С. et al., Успехи физических наук 2024 Т. 194 № 11 С. 1130–1145
Представлен краткий обзор достигнутого уровня оптических методов детектирования единичных молекул в биомедицинских приложениях. Показано, что регистрация флуоресценции единичных молекул красителей, ковалентно связанных с антителами (биомолекулами), совместно с использованием современных методов нанофотоники может быть применена для решения различных задач в биологии и медицине: визуализации биомолекул, токсинов, вирусных частиц, определения ультранизких концентраций аналитов напрямую во взятой пробе, ...
Added: May 21, 2026
Fominykh N., Fedosov I. S., Kryzhanovskaya N. et al., Письма в Журнал технической физики 2025 Т. 51 № 19 С. 11–14
The directed emission output of microdisk lasers through a coupled optical waveguide fabricated from the same heterostructure has been investigated. Disks with diameters of 30 and 40 µm containing an active region based on InGaAs/GaAs quantum dots were studied. To reduce absorption losses in the waveguide, a forward bias was applied to it. At a ...
Added: August 27, 2025
Kolymagin D. A., Prokhodtsov A. I., Chubich D. A. et al., Bulletin of the Russian Academy of Sciences: Physics 2024 Vol. 88 No. 12 P. 2016–2021
Photonic integrated circuits with improved optical input are used to obtain high-performance data transmission and processing systems. Transmitance spectra are studied for 3D microstructures fabricated via two-photon polymerization for inputting radiation in the range of 1480 to 1640 nm into photonic integrated circuits. Results were compared to transmittance of diffraction gratings. ...
Added: February 19, 2025
An P. P., V. V. Kovalyuk, Y. G. Gladush et al., Applied Physics Letters 2024 Vol. 125 No. 20 Article 201101
The rapid development of photonic integrated circuits (PICs) and their applications in various fields of science and technology requires the creation of easy-to-manufacture high-speed integrated detectors. In this work, we fabricated and studied planar waveguide-integrated bolometers based on a thin film of single-walled carbon nanotubes (SWCNTs) on the silicon nitride platform. This bolometer showed good ...
Added: November 11, 2024
K.V. Shein, A.N. Lyubchak, Zharkova E. et al., St. Petersburg Polytechnical University Journal: Physics and Mathematics 2024 Vol. 17 No. 3.2 P. 241–245
Photonic integrated circuits (PIC) represent a promising platform for applications in the field of quantum technologies, such as quantum computing and cryptography. One of the key components for these applications is detectors based on thin superconducting films. Nevertheless, fabricating thin detectors atop a waveguide utilizing conventional superconducting materials acquired through magnetron sputtering presents a multifaceted ...
Added: November 5, 2024
В. В. Ковалюк, И. О. Венедиктов, К. О. Седых et al., Известия высших учебных заведений. Радиофизика 2023 Т. 66 № 11 С. 927–985
We consider superconducting single-photon detectors, which are the key element of quantum optical
technologies due to their unique characteristics not available in other technologies today. Since the first
demonstration in Russia in 2001, such detectors have evolved significantly and, their waveguide-based
versions are ready for scaling both in the fields of classical technologies (attenuated light) and of
quantum optical ...
Added: April 10, 2024
A. Kuzin, Chernyshev V., V. Kovalyuk et al., Applied Physics Letters 2023 Vol. 123 No. 19 Article 193702
Today, the search for disease biomarkers and techniques for their detection is one of the most important focuses in modern healthcare. Extracellular vesicles (EVs) are known to be related to the pathogenesis of various illnesses, such as cancer, neurodegenerative disease, and cardiovascular disease. Specific EV detection and potential control of their amount in biological fluids ...
Added: November 8, 2023
Shakhovoy R., Marius P., Sharoglazova V. et al., Physical Review A: Atomic, Molecular, and Optical physics 2023 Vol. 107 No. 1 Article 012616
Gain-switched lasers are in demand in numerous quantum applications, particularly in systems of quantum key distribution and in various optical quantum random number generators. The reason for this popularity is natural phase randomization between gain-switched laser pulses. The idea of such randomization has become so familiar that most authors use it without regard to the ...
Added: January 30, 2023
Hangzhou: IEEE Xplore, 2022.
2022 PhotonIcs & Electromagnetics Research Symposium (PIERS), Hangzhou, China, 25–27 April 2022 ...
Added: January 30, 2023
Aleksei Kuzin, Chernyshev V., Kovalyuk V. et al., Optics Letters 2022 Vol. 47 No. 9 P. 2358–2361
Today, a lab-on-a-chip is one of the most promising ways to create sensor devices for gas and liquid analysis for environmental monitoring, early diagnosis, and treatment effectiveness assessment. On the one hand, this requires a large number of measurements and, on the other hand, involves minimum consumption of the test analytes. Combi- nation of highly ...
Added: January 30, 2023
Lazarenko P., Kovalyuk V., An P. et al., APL Materials 2021 Vol. 9 No. 12 Article 121104
We have studied transmission spectra of a silicon nitride O-ring resonator with a Ge2Sb2Te5 (GST) thin-film cover. We have performed numerical simulations of the transmission, absorption, reflection, and scattering for the GST cells of various thicknesses and lengths and have also measured transmission spectra O-ring resonators for GST cells of various length and phase states. ...
Added: January 30, 2023