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Локально деформированные Ge структуры, встроенные в микрорезонаторы, как активная среда для кремниевой фотоники
С. 819–820.
Юрасов Д. В., Байдакова Н. А., Verbus V. A., Гусев Н. С., Морозова Е. Е., Нежданов А. В., Новиков А. В., Скороходов Е. В., Шенгуров Д. В., Яблонский А. Н.
In book
Т. 2. , Нижегородский государственный университет им. Н.И. Лобачевского, 2020.
Ostovari Moghaddam A., Mehrabi-Kalajahi S., Solizoda I. A. et al., Metals and Materials International 2026 P. 1–9
Off-stoichiometric boron-doped chemically complex intermetallic alloys (CCIMAs) have recently emerged as a new avenue for overcoming the low temperature brittleness of ordered superlattices. However, their behavior at high temperatures remains unexplored. In this study, a novel (Ni39.6Co29.3Cr10Al15.8Ta3.3Nb2)98.5B1.5 CCIMA was prepared and its oxidation resistance over a wide temperature range (500 °C–950 °C) was studied. The ...
Added: October 1, 2026
Бабичев А. В., Makhov I., Kryzhanovskaya N. et al., Оптика и спектроскопия 2026 Т. 134 № 3 С. 272–277
Представлены результаты по реализации генерации при повышенных температурах в лазерах с длиной волны генерации 980 nm на основе вертикального микрорезонатора с использованием непоглощающих на длине волны оптической накачки зеркал. Минимальная пороговая мощность накачки составила ~0.8 mW и соответствовала температуре 150 K. Добротность микрорезонатора, определенная на пороге генерации, превысила 13000. Максимальная рабочая температура микролазера составила 195 ...
Added: September 25, 2026
Бабичев А. В., Makhov I., Kryzhanovskaya N. et al., Письма в Журнал технической физики 2026 Т. 52 № 12 С. 40–43
Реализована одночастотная генерация при 300 K в лазерах на основе вертикального микрорезонатора. Для лазеров с полупроводниковым выводным зеркалом пороговая плотность мощности накачки составила 6.5 kW/cm2. Добротность микрорезонатора и длина волны излучения, определенные на пороге генерации, равнялись 8800 и ~ 959.8 nm. Применение конструкции микрорезонатора с гибридным выводным зеркалом позволило повысить добротность микрорезонатора (до 12 360) ...
Added: September 25, 2026
Деменев А. А., Терешко С. Н., Гиппиус Н А et al., Известия РАН. Серия физическая 2025 Т. 89 № 2 С. 265–273
The authors study the temporal evolution of polarized spectra of emissions from spinor exciton‒
polariton condensates in double tunnel-coupled potential traps inside a high-Q GaAs/AlAs microcavity
at 2 K upon resonance laser pumping with picosecond pulses at times of up to 1.5 ns. The period of the condensates’
spin relaxation in a double trap is estimated as τs ...
Added: June 23, 2026
Filippova A. V., Yurchenko N. Y., Smirnov S. A. et al., Journal of Alloys and Compounds 2026 No. 1074 Article 189162
This study investigates the effects of post-processing heat treatment at 300–500 °C on the microstructure, hardness, and tensile properties of laser powder bed fusion (PBF-LB) processed Al-bronze processed with energy densities (ED) in the range of 125–938 J/mm3. In the as-printed state, sharp needle-like α + β′ laths form at lower ED whereas with increasing ED, the β′ ...
Added: June 12, 2026
Бабичев А. В., Makhov I., Kryzhanovskaya N. et al., Письма в Журнал технической физики 2025 № 21 С. 58–62
Продемонстрирована генерация в микролазерах на основе вертикального микрорезонатора при температуре 244 K. Пороговая поглощенная оптическая мощность, длина волны генерации и добротность микролазера с диаметром 4 µm составили ∼ 2.8 mW, 989 nm и 12 000 соответственно. Минимальная пороговая поглощенная оптическая мощность (250 µW) соответствует температуре 168 K. ...
Added: March 13, 2026
Babichev A., Blokhin A., Zadiranov Y. et al., Applied Physics Letters 2026 Vol. 128 No. 5 Article 051105
High-quality micropillar cavities were grown using molecular-beam epitaxy. Stable continuous-wave lasing at room temperature was demonstrated for microlasers with semiconductor and hybrid output mirrors. At 300 K, single-mode lasing was demonstrated for micropillars with a diameter of 5 um at a wavelength of 960 nm, with a minimum lasing threshold of 1.2 mW and the ...
Added: March 13, 2026
Petrakova N., Demina A., Zobkova Y. et al., Journal of Alloys and Compounds 2025 Vol. 1037 Article 181865
The hydroxyapatite powders with co-doping of Ca2+ with Na+ and Ce3+ were obtained by aqueous precipitation.
Co-doping was considered as a method of charge compensation in the cationic sublattice of the HA structure by
means of the 2Ca2+→Ce3+ + Me+ in order to maintain the stability of phase composition, improve the optical
and microstructural properties of the HA ...
Added: November 5, 2025
Samoilova O., Pratskova S., Shaburova N. et al., Materials 2025 Vol. 18 No. 15 Article 3701
The microstructure, phase composition, and high-temperature oxidation resistance of Fe-free AlCoCrNiNb0.2 and AlCoCr0.5NiNb0.2 high-entropy alloys (HEAs) were investigated. In the as-cast HEAs, niobium was found to mainly release as a Laves phase in the interdendritic region, and its solubility in the dendrites of the BCC solid solution was about 2 at.%. Both samples exhibited parabolic behavior during ...
Added: August 29, 2025
Ostovari Moghaddam A., Shaburova N., Abdollahzadeh A. et al., Journal of Alloys and Compounds 2025 Vol. 1035 Article 181537
In this study, an off-stoichiometric boron-doped chemically complex intermetallic alloy with a dual phase ordered-L12/disordered-FCC structure was developed, which exhibited an outstanding combination of high strength and ductility. The superior mechanical properties were attributed to the synergistic features of dual-phase microstructure, increased antiphase boundary energy due to the multi-additions of Ti, Nb and Ta elements ...
Added: June 30, 2025
Nechvoglod O., Ostovari Moghaddam A., Pratskova S. et al., The Minerals, Metals & Materials Society 2025 Vol. 77 P. 1005–1028
This work provides an overview on the fabrication process, composition and properties of high-entropy alloy (HEA) coatings fabricated by electrodeposition. Special attention is paid to the effect of electrodeposition parameters and electrolyte composition on the microstructure, morphology, and mechanical/functional properties of the HEA coatings. It is demonstrated that the majority of researches has been focused ...
Added: June 10, 2025
Дудников Д. О., Коннов Э. А., Огурцов Н. А., Вестник Астраханского государственного технического университета. Серия: Управление, вычислительная техника и информатика 2025 Т. 2025 № 2 С. 69–75
Представлены современные подходы к автоматизации анализа микроструктуры металлических материалов, направленные на повышение точности и эффективности исследований. Описана разработка программного обеспечения для идентификации и классификации зерен в металлах, что является ключевым аспектом в изучении их структуры и прогнозировании механических свойств. Программа включает модули для частично автоматизированной обработки изображений, анализа характеристик зерен, визуализации результатов и интеграции с ...
Added: May 15, 2025
Зубов Ф. И., Шерняков Ю. М., Бекман А. А. et al., Письма в Журнал технической физики 2024 Т. 50 № 6 С. 23–27
Исследованы ватт-амперные характеристики полудисковых микролазеров c активной областью на основе квантовых яма-точек InGaAs/GaAs, излучающих на длине волны 1090 nm. Приборы изготовлены путем скалывания дисковых резонаторов диаметром 200 µm с шириной кольцевого контакта 10 µm. В режиме непрерывной накачки максимальная выходная мощность при 20◦C составила 110 mW, а лазерная генерация наблюдалась до 113◦C ...
Added: February 25, 2025
Trofimov E., Ostovari Moghaddam A., Litvinyuk K. et al., Journal of Alloys and Compounds 2023 Vol. 934 Article 168021
High-entropy intermetallic compounds (HEICs) are a relatively new group of materials with potentially intricate properties. This work presents an experimental and theoretical study of microsegregation in single-phase (Co0.2Cu0.2Fe0.2Mn0.2Ni0.2)Al and (Co0.2Cu0.2Fe0.2Mn0.2Ni0.2)Zn3 HEICs prepared by melting technique. It is shown that the microsegregation of elements occupying the high-entropy sublattice can be explained by the nature of the ...
Added: February 18, 2025
Lashkari A. H., Ostovari Moghaddam A., Naseri M. et al., Journal of Materials Research and Technology 2023 Vol. 24 P. 5024–5031
In the present work, the formation of high entropy MAX phase during mechanical alloying and subsequent spark plasma sintering (SPS) of two powder mixtures with (HfZrNbTiTa)3SiC2 and (HfZrNbTiTa)3(SiAl)1.1C1.95 stoichiometries is investigated. The results indicate that a high entropy carbide (HEC) with cubic HfC-prototype structure is formed for both compositions after 7 h of mechanical alloying. The ...
Added: February 18, 2025
Effect of Pt Addition on the Oxidation and Corrosion Resistance of Al0.25CoCrFeNi High-Entropy Alloy
Samoilova O., Pratskova S., Suleymanova I. et al., Metals 2023 Vol. 13 No. 10 Article 1709
The effect of minor platinum alloying on the microstructure, phase composition, oxidation and corrosion resistance of Al0.25CoCrFeNi high-entropy alloy (HEA) has been studied. It was observed that Pt does not segregate as a separate phase, but it is incorporated into the fcc solid solution. High-temperature oxidation of the as-cast Al0.25CoCrFeNi and Al0.25CoCrFeNiPt0.1 high-entropy alloys was ...
Added: February 18, 2025
Ostovari Moghaddam A., Shaburova N., Naseri M. et al., Metals 2023 Vol. 13 No. 11 Article 1807
Ni-based composite coatings reinforced by high-entropy intermetallic compounds (HEICs) were prepared by detonation spraying (DS) on low alloy steel substrates. To this end, first (Ti-Nb)(V-Cr-Ni-Fe) and Al3(TiZrNbCrHfTa) HEIC powders were fabricated by arc melting followed by ball milling. The as-milled HEIC powders were then employed as reinforcement particles to prepare Ni-7wt.% HEIC composite coatings. The ...
Added: February 18, 2025
Ostovari Moghaddam A., Shaburova N., Pashkeev K. et al., Transactions of the Indian Institute of Metals 2025 Vol. 78 Article 61
In this study, BaFe12O19 and three corresponding BaFe6(AlCrTiGaCo)6O19, BaFe2(AlCrTiGaCo)10O19 and BaFe6(AlCrSnGaCo)6O19 high-entropy oxides (HEOs) particles were utilized as reinforcement particles to fabricate Al-matrix composites coatings using cold gas dynamic spraying technique. First, BaFe12O19 and HEOs reinforcement particles with a single BaFe12O19-type structure were fabricated by solid-phase sintering and ball milling. Then, Al-matrix composites with a ...
Added: February 8, 2025