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Инфракрасные (850 нм) светодиоды с множественными InGaAs квантовыми ямами и «тыльным» отражателем
Физика и техника полупроводников. 2021. Т. 55. № 8. С. 699–703.
Малевская А. В., Калюжный Н. А., Малевский Д. А., Минтаиров С. А., Nadtochiy A., Нахимович М. В., Солдатенков Ф. Ю., Шварц М. З., Андреев В. М.
Investigation of IR light emitting diodes (wavelength 850 nm) based on AlGaAs/GaAs heterostructures with multiple quantum wells InGaAs in the region generating radiation, grown by the MOCVD technique, has been carried out. Post-growth technologies for removing the growth substrate and for transfer the heterostructure on an alien carrier with an optical reflector have been developed. Technological regimes for fabricating the reflector has been optimized and the increase of the IR radiation reflection coefficient up to 92−93% has been achieved. Lightemitting diodes with the external quantum efficiency of 28.5% have been fabricated.
Publication based on the results of:
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, ...
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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 ...
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Анциферов П. С., Степанов Л. В., Матюхин Н. Д., Оптика и спектроскопия 2026 Т. 134 № 2 С. 214–218
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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, ...
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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 ...
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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 ...
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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 ...
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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 ...
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Smirnov A., 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
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
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
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 ...
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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
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
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nonlinear term. Based on this equation, we develop a diagrammatic technique to calculate corrections
to the correlation function obtained in the linear approximation. We ...
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Арсенов М. А., Loginov D. A., Успехи химии 2025 Т. 94 № 7 Статья RCR5179
Изокумарины являются изомерами широко известного классам органических ароматических лактонов — кумаринов, которые обладают уникальными фотофизическими свойствами. Несмотря на структурное сходство с кумаринами, области применения изокумаринов долгое время ограничивались использованием таких соединений в медицине и сельском хозяйстве благодаря их фунгицидной, антибактериальной и противовоспалительной активности. Большая часть исследованных органических соединений этого класса была выделена из живых организмов. ...
Added: February 20, 2026
Tan J., Jiang X., Liu D. et al., The Journal of Physical Chemistry Letters 2025 Vol. 16 No. 30 P. 7659–7665
Two-dimensional (2D) Ruddlesden–Popper (RP) perovskites are considered as promising optoelectronic materials due to their intriguing broadband emission properties. However, the origin of the broadband emission in RP perovskites remains a controversial issue. Herein, we have systematically analyzed the exciton behavior and luminescence properties of 2D (PEA)2PbI4. Our calculations demonstrate that 2D (PEA)2PbI4 exhibits significant quantum confinement ...
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Мельниченко И. А., Kryzhanovskaya N., Ivanov K. et al., Оптика и спектроскопия 2023 Т. 131 № 8 С. 1112–1117
Исследованы оптические свойства цилиндрических мезаструктур на основе GaAs до и после пассивации, выполненной с применением обработки структур в водородной плазме с последующим атомно-слоевым осаждением слоя Al2O3. В качестве светоизлучающей области мезаструктур использованы квантовая яма In0.2Ga0.8As/GaAs и сверхрешетка GaAs/AlAs. Диаметр мез изменялся от 3 до 20 μm. В результате пассивации получено 8-кратное увеличение интенсивности фотолюминесценции мез ...
Added: October 26, 2023
Адамов Р. Б., Петрук А. Д., Мелентьев Г. А. et al., Научно-технические ведомости Санкт-Петербургского государственного политехнического университета. Физико-математические науки 2022 Т. 15 № 4 С. 32–43
In the paper, comparative studies of near-IR photoluminescence (PL) in structures with GaAs/AlGaAs quantum wells possessing different selective doping profiles have been performed. The PL spectra recorded at 5 K for different intensities of interband optical pumping were analyzed and main channels of radiative recombination were determined. The dependences of the main PL line intensities ...
Added: July 3, 2023
Новиков И. И., Няпшаев И. А., Гладышев А. Г. et al., Физика и техника полупроводников 2022 Т. 56 № 9 С. 933–939
Исследовано влияние состава волновода InGaAlAs на фотолюминесценцию и электролюминесценцию гетероструктур спектрального диапазона 1550 нм на основе тонких напряженных квантовых ям In0.74Ga0.26As. Предложен подход, позволяющий на основе анализа электролюминесценции провести сравнительный анализ параметров усиления изготовленных лазерных гетероструктур. Показано, что уменьшение доли алюминия в составе волноводных слоев гетероструктуры, согласованных по постоянной решетки с фосфидом индия, приводит к ...
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Saakyan S., D'yachkov L., Klimov S. et al., Spectrochimica Acta - Part B: Atomic Spectroscopy 2022 Vol. 195 Article 106503
We report the accurate quantitative measurements of the photoionization (PI) cross section of lithium-7 confined in a magneto-optical trap (MOT). The losses from the MOT induced by radiation of the low-power light-emitting diodes (LEDs) are measured as a function of the photoionizing radiation intensity. On the basis of these measurements, the PI cross section from ...
Added: July 30, 2022
Makhov I., Budkin G. V., Graf S. V. et al., Micro and Nanostructures 2022 Vol. 167 Article 207288
The effect of current drag of photons is experimentally investigated in the mid-infrared spectral range corresponded to the intersubband optical electron transitions in GaAs/AlGaAs quantum wells at room temperature for the first time. The optical electron transitions between the first and second electron subbands in quantum wells are revealed in light absorption spectra in the mid-infrared range. The dependences of the ...
Added: July 5, 2022
Mantsevich V. N., Rozhansky I. V., Maslova N. S. et al., Physical Review B: Condensed Matter and Materials Physics 2019 No. 99 Article 115307
We consider time-dependent processes in the optically excited hybrid system formed by a quantum well (QW) coupled to a remote spin-split correlated bound state. The spin-dependent tunneling from the QW to the bound state results in the nonequilibrium electron spin polarization in the QW. The Coulomb correlations at the bound state enhance the spin polarization ...
Added: October 21, 2021
Makhov I. S., Panevin V. Y., Firsov D. A. et al., Journal of Luminescence 2019 Vol. 210 P. 352–357
The low-temperature terahertz and near-infrared photoluminescence from the near-infrared laser nanostructure with GaAs/AlGaAs quantum wells doped with shallow donors is studied under intense interband optical excitation. The optical electron transitions involving excited and ground donor states in quantum wells are revealed in terahertz and near-infrared photoluminescence spectra. Impurity assisted near-infrared stimulated emission under interband optical ...
Added: October 15, 2021
Makhov I. S., Panevin V. Y., Firsov D. A. et al., Journal of Applied Physics 2019 Vol. 126 No. 17 Article 175702
The terahertz radiation in GaAs/AlGaAs quantum wells with different types of doping was experimentally studied under interband optical excitation of nonequilibrium charge carriers. The structures doped only with donors, and the structures with a high degree of compensation of donors by acceptors were studied. The spectra of terahertz radiation associated with charge carrier transitions with ...
Added: October 15, 2021