Thermo-optical properties of nanophotonic devices with carbon nanotube films

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Thermo-optical properties of nanophotonic devices with carbon nanotube films

Journal of Physics: Conference Series. 2021. Vol. 2086. No. 1. P. 1–4.

Komrakova S., An P., Kovalyuk V., Golikov A., Gladush Y., Mkrtchan A., Nasibulin A., Goltsman G.

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.

Research target: Physics

Ising models on the hydrogen peroxide and other lattices

Qian X., Deng Y., Shchur L. et al., Physica A: Statistical Mechanics and its Applications 2026 Vol. 696 P. 1–13

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

Оптические методы детектирования единичных биомолекул: визуализация, сенсорика, секвенирование молекул ДНК

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

VACUUM DISCHARGE DRIVEN BY STRIPE LINE STORAGE AS A SOURCE OF EUV RADIATION

Antsiferov P.S., Stepanov L.V., Matiukhin N. D., Review of Scientific Instruments 2025 Vol. 96 No. 12 Article 123506

The article presents the discharge plasma based source of extreme ultraviolet (EUV) radiation. The discharge circuit has been driven by means of stripe line storage with working voltage 10.5 kV. The main feature of the proposed source is that plasma electrons acquire the energy, necessary for the production of multiply charged ions with ionization potentials ...

Added: May 20, 2026

Регистрация спектров на 6.65 метровом ВУФ-УФ спектрометре с помощью многоканального детектора

Анциферов П. С., Степанов Л. В., Матюхин Н. Д., Оптика и спектроскопия 2026 Т. 134 № 2 С. 214–218

Сообщено о разработке системы регистрации спектров на ПЗС-линейке для уникального ВУФ спектрометра, построенного на основе сферической дифракционной решетки с радиусом 6.65 m. Была использована линейка HAMAMATSU S11156-2048-02, которая устанавливалась по касательной к окружности Роуланда с возможностью механического перемещения для сканирования спектра. Были получены спектрограммы в диапазоне длин волн 2130-2270 Angstrem. Описана методика сшивки регистрируемых спектральных ...

Added: May 20, 2026

ML-based Fast Simulation of FARICH Responses

Shipilov F., Barnyakov A., Ivanov A. et al., / Series Physics "arxiv.org". 2026.

A fast simulation of the detector response is a vital task in high-energy physics (HEP). Traditional Monte-Carlo methods form the backbone of modern particle physics simulation software but are computationally expensive. We present a machine-learning-based approach to fast simulation of the Focusing Aerogel Ring Imaging Cherenkov (FARICH) detector response. Given a particle track and momentum, ...

Added: May 19, 2026

On a Possible Method for Separating CO Lines from the Spectrum of the Cosmic Microwave Background

Malinovsky A. M., Пилипенко С. В., Mikhalchenko A. O. et al., Astronomy Reports 2026 Vol. 70 P. 1–6

Radiation from rotational transitions of CO molecules in distant galaxies creates a chaotic background with an intensity reaching 1000 Jy/sr at a wavelength of approximately 1 mm. This background will pose a serious problem, when measuring spectral distortions of the cosmic microwave background, in particular, the mu-distortion, which presumably has an intensity of less than ...

Added: May 19, 2026

Broadband photoluminescence of epitaxial bismuth nanowires and planar nanostructures

Kaveev A. K., Fedorov V. V., Pavlov A. V. et al., Journal of Materials Chemistry C 2026 Vol. 14 No. 7 P. 2697–2705

Bismuth nanostructures represent a promising material platform for semiconductor nanooptoelectronics and colorimetry owing to the multi-colored light reflection and quantum confinement. In this work, we study the photoluminescent properties of bismuth nanostructures grown using molecular beam epitaxy on the planar CaF2/Si(111) surface. We demonstrate the different surface morphologies of Bi, ranging from planar films obtained ...

Added: May 19, 2026

STM study of single phosphorus incorporation into silicon by heating PBr3 on Si(100)

Pavlova T., V.M. Shevlyuga (Шевлюга В. М., Applied Surface Science 2026 Vol. 736 P. 166813–166813

The objective of miniaturizing doped areas in silicon, with the ultimate goal of achieving atomic-precision doping, requires a fundamental understanding of the dopant incorporation process at the atomic level. We present a combined scanning tunneling microscopy (STM) and density functional theory (DFT) investigation of single phosphorus atom incorporation into the Si(100) surface. Phosphorus was supplied ...

Added: May 19, 2026

Single-photon diamond sources created by nature

Pasternak D., Romshin A., Khmelnitsky Р. et al., Carbon 2026 Vol. 256 Article 121655

A single-photon source (SPS) is a key component required for quantum communication devices. We report the discovery of bright diamond-based SPS created by nature. It is shown that narrow (≤2 nm) lines observed in the 500-800 nm range in photoluminescence (PL) spectra of the surface layer of untreated Yakut diamonds rich in nitrogen and hydrogen are linked to ...

Added: May 19, 2026

Optical features of nanoplatelets modified with chiral ligands

A.M. Smirnov, Kurtina D. A., Saitov S. R. et al., Optical Materials: X 2026 Vol. 30 Article 100441

Chiral semiconductor nanostructures and nanoparticles are promising materials for applications in biological sensing, enantioselective separation, photonics, and spin-polarized devices. Here we performed a detailed analysis of optical properties of chiral CdSe nanoplatelets with thickness of 2 and 3 monolayers (ML) with Nacetyl-L-cysteine ligands. We studied the absorption spectra peculiarities, analyzed time-resolved photoluminescence and investigated circular ...

Added: May 18, 2026

Temperature-driven charge transport in annealed CdSe/CdS nanoplatelets film

Smirnov A., Mantsevich V. N., Saitov S. R. et al., Journal of Applied Physics 2026 Vol. 139 Article 185702

This work presents a comprehensive investigation into the temperature-dependent thermally stimulated conductivity and photoconductivity of vacuum-annealed thin films based on core–shell CdSe/CdS nanoplatelets passivated with oleic acid ligands. Controlled thermal annealing under vacuum conditions leads to a substantial increase in both dark and photoinduced conductivity, which is primarily attributed to partial desorption of the ligands. ...

Added: May 18, 2026

Направленность вывода излучения из кольцевых микролазеров с нарушенной вращательной симметрией

Масютин Д. А., Moiseev E., Komarov S. et al., Письма в Журнал технической физики 2026 Т. 52 № 7 С. 27–30

Исследованы инжекционные полупроводниковые микролазеры с кольцевым резонатором радиусом 15 мкм с несимметричным расположением внутреннего отверстия резонатора. Показано, что асимметрия обеспечивает формирование в диаграмме направленности двух лепестков излучения, разориентированных на 50° относительно оси смещения внутреннего отверстия. Измеренная добротность резонаторов сопоставима с добротностью дисковых резонаторов и находится на уровне ∼ 10^6. ...

Added: May 18, 2026

Plasmonic Au-Assisted g-C3N4/CeO2 Heterojunction for Enhanced Photocatalytic Breakdown of Organic Pollutants

Rathish S., Andrey S. Vasenko, Thazhathenair A. et al., The Journal of Physical Chemistry Letters 2026 Vol. 17 No. 18 P. 5386–5394

We demonstrate and rationalize the effect of Au nanoparticles (NPs) on the hierarchical g-C3N4/CeO2 heterojunction. g-C3N4/CeO2 decorated with monodispersed plasmonic Au NPs was synthesized. Detailed analyses showed that CeO2 nanocubes and monodispersed Au NPs were evenly distributed over the 2D g-C3N4 surface, forming a robust interface enriched with abundant active sites. The structure enabled efficient separation of photogenerated charge ...

Added: May 16, 2026

The origin of enhanced photocatalytic performance in titanium dioxide via niobium doping: From experimental assessments to DFT insights

Das A., Paul R., Sharma N. et al., Colloids and Surfaces A: Physicochemical and Engineering Aspects 2026 Vol. 728 P. 138830

Niobium-doped TiO2 (Nb-TiO2), demonstrates dual functionality as an efficient photocatalyst for dye degradation and a promising photoelectrocatalyst for water oxidation. Nb incorporation via a facile hydrothermal method was confirmed by XRD (Rietveld refinement), XPS, TEM, FT-IR, Raman, and BET analyses, indicating successful lattice doping and structural modification. Photocatalytic dye degradation experiments were conducted using a model ...

Added: May 16, 2026

Perturbation theory for phase correlations of a light wave propagating in a turbulent medium

I. V. Kolokolov, V. V. Lebedev, Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 2026 Vol. 113 No. 5 Article 054117

We theoretically investigate the correlation functions of the phase of a light wave propagating through a turbulent medium. We use an equation for the logarithm of a wave packet envelope, which includes a secondorder nonlinear term. Based on this equation, we develop a diagrammatic technique to calculate corrections to the correlation function obtained in the linear approximation. We ...

Added: May 15, 2026

Perovskite nanoparticles Cs4PbBr6 and CsPbBr3: synthesis, analysis and peculiar optical properties

Гущина В. А., / Series chemrxiv-2023-vpzhz-v2 "ChemRxiv". 2023.

All-inorganic perovskite CsPbBr3 and Cs4PbBr6 nanoparticles are being intensively studied due to their unique properties and wide range of applications; however, however, the nature of their optical properties is not yet fully understood due to the difficulty of synthesis of singlephase nanoparticles. In this article we describe the features of the synthesis of single-phase particles ...

Added: May 14, 2026

CsPbBr3 and Cs4PbBr6 perovskite nanoparticles: hidden potential of Cs4PbBr6 or ineffective fluorescence?

Гущина В. А., Mendeleev Communications 2025 Vol. 35 No. 2 P. 193–195

All-inorganic perovskite CsPbBr3 and Cs4PbBr6 nanoparticles are intensively studied for their unique optical properties, though synthesizing single-phase nanoparticles has posed challenges. Detailed synthesis method of CsPbBr3 and Cs4PbBr6 single-phase nanoparticles and their chemical and phase analysis are described. Distinctive optical characteristics, such as photoluminescence, optical band gap and the Urbach tail region, are revealed and explained within the current ...

Added: May 14, 2026

SERS effect on the surface of ZnO nanorods coated with CsPbBr3

Гущина В. А., Physics of Complex System 2026 Vol. 7 No. 1 P. 3–15

Heterostructures based on ZnO nanorods and CsPbBr3 nanocrystals were investigated for their potential as semiconductor SERS substrates. We found that ZnO morphology governs the efficiency of interfacial energy transfer, leading to enhanced photoluminescence under 390 nm excitation and a noticeable reduction of the bandgap in the composites. Raman analysis revealed a pronounced intensity enhancement and ...

Added: May 14, 2026

Исследование быстродействия электрооптического модулятора на кольцевом микрорезонаторе из тонкопленочного ниобата лития на изоляторе

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

Разработка волноводного сверхпроводникового детектора с разрешением по числу фотонов

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

Low power reconfigurable multilevel nanophotonic devices based on Sn-doped Ge2Sb2Te5 thin films

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

Performance of microheaters for tunable on-chip interferometer

Venediktov I. O., Elezov M. S., Prokhodtsov A. I. et al., Journal of Physics: Conference Series 2021 Vol. 2086 No. 1 P. 1–4

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 ...

Added: February 15, 2022

Characterization of focusing grating couplers for telecom wavelengths in the first and second diffraction order

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

Лазерная модификация титановой пленки на поверхности оптических волноводов в ниобате лития

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