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Ordering processes and phase transitions in ammonium-containing crystals of A2BWO3F3 elpasolites – com?parative Raman and infrared study [Text] / A. N. Vtyurin, A. S. Krylov [et al.] // The 6th International Seminar on Ferroelastics Physics (ISFP-6) : Voronezh, September 22–25, 2009. - P23

Доп.точки доступа:
Vtyurin, A.N.; Krylov, A.S.; Gerasimova, Ju.V.; Ivanenko, A.A.; Shestakov, N.P.; Laptash, N.M.; International Seminar on Ferroelastic Physics(6 ; 2009 ; Sept. ; 22-25 ; Voronezh)
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Optical thermometer based on efficient near-infrared dual-emission of Cr3+ and Ni2+ in magnetoplumbite structure / Qianqian Zhang, Guogang Li, Guangzhi Li [et al.] // Adv. Optical Mater. - 2024. - Vol. 12, Is. 1. - Ст. 2301429, DOI 10.1002/adom.202301429. - Cited References: 22. - This work was financially supported by the National Science and Technology Major Project (2022YFB3503800), the Projects for Science and Technology Development Plan of Jilin Province (20210402046GH), the National Natural Science Foundation of China (NSFC No. 51932009, 51720105015, 51929201, 52072349, 52172166), the Natural Science Foundation of Zhejiang Province (LR22E020004), and the Project funded by China Postdoctoral Science Foundation (2022TQ0365). M.S. Molokeev acknowledges the support by the Ministry of Science and Higher Education of Russian Federation (Project No. FSRZ-2023-0006) . - ISSN 2195-1071
Кл.слова (ненормированные):
energy transfers -- NIR dual emissions -- NIR-LED -- optical temperature sensing
Аннотация: Recently, an optical thermometer based on the dual-emitting fluorescent intensity ratio (FIR) in the visible light (VIS) region has achieved great development. However, there is very little progress in thermometers from NIR light. In this work, a novel optical thermometer based on highly efficient NIR dual-emission of Cr3+ and Ni2+ in LaZnGa11O19 (LZG) with a magnetoplumbite structure is designed. Utilizing energy transfer from Cr3+ to Ni2+, the dual-emission shows a wide coverage in the 650–1600 nm region, covering the NIR I and II windows, respectively. The as-reported LZG:0.3Cr3+ and LZG:0.3Cr3+,0.01Ni2+ phosphors can reach internal/external quantum efficiency (IQE/EQE) of 94%/64% and 77%/53%, respectively. The electroluminescence property and potential applications in spectroscopic analysis, night-vision, and bioimaging of fabricated NIR-LED with LZG:0.3Cr3+,0.01Ni2+ have also been investigated. In addition, the designed ratiometric optical thermometer responds to wide temperature ranges (100-175 K, 200–475 K) and shows a maximum relative sensitivity value (Sr) of 2.4% K−1 at 475 K. The optical performance of absorption in the red region and emission in the NIR region enables the LZG:0.3Cr3+,0.01Ni2+ to become a candidate for NIR optical thermometers in biotechnological applications.

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Держатели документа:
State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei2 30026, China
Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan4 30074, China
Zhejiang Institute, China University of Geosciences, Hangzhou 311305, China
College of Pharmacy, Jiamusi University, Jiamusi, Heilongjiang 154007, P. R. China
International Research Center of Spectroscopy and Quantum Chemistry—IRCSQC, Siberian Federal University, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Zhang, Qianqian; Li, Guogang; Li, Guangzhi; Liu, Dongjie; Dang, Peipei; Qiu, Lei; Lian, Hongzhou; Molokeev, M. S.; Молокеев, Максим Сергеевич; Lin, Jun
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    Effects of endohedral Gd-containing fullerenols with a different number of oxygen substituents on bacterial bioluminescence / E. A. Stepin, E. S. Sushko, N. G. Vnukova [et al.] // Int. J. Mol. Sci. - 2024. - Vol. 25, Is. 2. - Ст. 708, DOI 10.3390/ijms25020708. - Cited References: 102. - This research was funded by the State Assignment of the Ministry of Science and Higher Education of the Russian Federation, project No. 0287-2021-0020, and partly supported by the Russian Science Foundation No. 23-26-10018, Krasnoyarsk Regional Science Foundation . - ISSN 1661-6596. - ISSN 1422-0067
   Перевод заглавия: Влияние эндоэдральных Gd-содержащих фуллеренолов с различным числом кислородных заместителей на биолюминесценцию бактерий
Кл.слова (ненормированные):
endohedral fullerenol -- gadolinium -- bioluminescence -- bacterial bioassay -- toxicity -- enzymatic bioassay -- reactive oxygen species -- density functional tight binding method -- fourier-transform infrared spectroscopy
Аннотация: Gadolinium (Gd)-containing fullerenols are perspective agents for magnetic resonance imaging and cancer research. They combine the unique paramagnetic properties of Gd with solubility in water, low toxicity and antiradical activity of fullerenols. We compared the bioeffects of two Gd-containing fullerenols with a different number of oxygen groups—20 and 42: Gd@C82O20H14 and Gd@C82O42H32. The bioluminescent bacteria-based assay was applied to monitor the toxicity of fullerenols, bioluminescence was applied as a signal physiological parameter, and bacterial enzyme-based assay was used to evaluate the fullerenol effects on enzymatic intracellular processes. Chemiluminescence luminol assay was applied to monitor the content of reactive oxygen species (ROS) in bacterial and enzymatic media. It was shown that Gd@C82O42H32 and Gd@C82O20H14 inhibited bacterial bioluminescence at >10?1 and >10?2 gL?1, respectively, revealing a lower toxicity of Gd@C82O42H32. Low-concentration (10?3–10?1 gL?1) bacterial bioluminescence activation by Gd@C82O42H32 was observed, while this activation was not found under exposure to Gd@C82O20H14. Additional carboxyl groups in the structure of Gd@C82O42H32 were determined by infrared spectroscopy and confirmed by quantum chemical calculations. The groups were supposed to endow Gd@C82O42H32 with higher penetration ability through the cellular membrane, activation ability, lower toxicity, balancing of the ROS content in the bacterial suspensions, and lower aggregation in aqueous media.

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Держатели документа:
Biophysics Department, School of Fundamental Biology and Biotechnology, Siberian Federal University, 660041 Krasnoyarsk, Russia
Institute of Biophysics SB RAS, FRC KSC SB RAS, 660036 Krasnoyarsk, Russia
Institute of Physics SB RAS, FRC KSC SB RAS, 660036 Krasnoyarsk, Russia
Department of Solid State Physics and Nanotechnology, School of Engineering Physics and Radioelectronics, Siberian Federal University, 660074 Krasnoyarsk, Russia
Department of Physical and Inorganic Chemistry, School of Non-Ferrous Metals and Materials Science, Siberian Federal University, 660025 Krasnoyarsk, Russia
Laboratory for Digital Controlled Drugs and Theranostics, FRC KSC SB RAS, 660036 Krasnoyarsk, Russia

Доп.точки доступа:
Stepin, E. A.; Sushko, E. S.; Сушко, Екатерина Сергеевна; Vnukova, N. G.; Внукова, Наталья Григорьевна; Churilov, G. N.; Чурилов, Григорий Николаевич; Rogova, A. V.; Tomilin, F. N.; Томилин, Феликс Николаевич; Kudryasheva, N. S.
}
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    Solid state synthesis, structural, DFT and spectroscopic analysis of EuAl3(BO3)4 / A. S. Oreshonkov, A. S. Aleksandrovsky, O. D. Chimitova [et al.] // Mater. Chem. Phys. - 2024. - Vol. 320. - Ст. 129400, DOI 10.1016/j.matchemphys.2024.129400. - Cited References: 55. - The work was carried out within the state assignment No FWES-2024-0003 of Kirensky Institute of Physics. This work was partially supported by the state order of BINM SB RAS (0273-2021-0008). The samples for this research were synthesized using equipment of the CCU BINM SB RAS. The reflectance spectrum was obtained at the Center for Optical and Laser Materials Research of Research park of St. Petersburg State University. The SEM measurements were performed at Krasnoyarsk Regional Center of Research Equipment of Federal Research Center "Krasnoyarsk Science Center SB RAS" . - ISSN 0254-0584. - ISSN 1879-3312
   Перевод заглавия: Твердофазный синтез, структурный, квантово-химический (DFT) и спектроскопический анализ EuAl3(BO3)4
Кл.слова (ненормированные):
EuAl(BO) -- Huntite -- X-ray diffraction -- SEM -- DFT -- Charge transfer -- Raman -- Infrared -- Luminescence
Аннотация: Huntite-like borates are versatile and promising materials with wide range of applications in frequency conversion, UV light generation, lighting, displays, quantum information storage, and more, demonstrated by their various properties and uses in scientific research. In this work, EuAl3(BO3)4 powder was prepared through multi-stage solid-state reaction method using high-purity starting reagents: Eu2O3, Al2O3 and H3BO3, considering a 20 wt% excess of H3BO3 to compensate for B2O3 volatilization. Obtained samples undergo several treatments at varying temperatures and their phase purity is subsequently verified through powder X-ray diffraction analysis. The scanning electron microscopy reveals that resulting EuAl3(BO3)4 powder consists of granules exhibiting irregular morphologies with dimensions of 0.5–8 μm. The electronic band structure of EuAl3(BO3)4, calculated using the GGA PBE method, reveals f-states of Eu near 4 eV. These states do not produce emphasized peaks on simulated absorbance spectra. Using of DFT + U for the f-states of Eu pushed up f-bands above 6 eV and the charge transfer from p-O to d-Eu was obtained (Egdirect = 5.63 eV, Egindirect = 5.37 eV using Ueff = 4 eV). The variation of Ueff has a weak influence on the position of the bottom of the conduction band. The experimental bandgaps of EuAl3(BO3)4 crystalline powder, both direct and indirect, are found to be 3.96 and 3.67 eV, correspondingly. These values are lower than theoretical values what is associated with limitations of DFT calculations involving f electrons. The Raman spectrum of EuAl3(BO3)4 powder is discussed, detailing the contributions of different ions to specific spectral bands. Investigation of high-resolution luminescence spectra shows the possibility to estimate the content of defects by the testing the violation of the prohibition of ultranarrow 5D0 → 7F0 line that is forbidden in the ideal crystalline structure of trigonal EuAl3(BO3)4.

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Держатели документа:
Laboratory of Molecular Spectroscopy, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russia
School of Engineering and Construction, Siberian Federal University, Krasnoyarsk, 660041, Russia
Laboratory of Coherent Optics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russia
Institute of Nanotechnology, Spectroscopy and Quantum Chemistry, Siberian Federal University, Krasnoyarsk, 660041, Russia
Laboratory of Oxide Systems, Baikal Institute of Nature Management, SB RAS, Ulan-Ude, 670047, Russia
Center for Optical and Laser Materials Research, Saint-Petersburg State University, Saint-Petersburg, 199034, Russia
Emanuel Institute of Biochemical Physics of Russian Academy of Sciences, Moscow, 119334, Russia
Plekhanov Russian University of Economics, Moscow, 117997, Russia
Moscow Institute of Physics and Technology, Dolgoprudny, 141700, Russia
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russia
School of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, 660041, Russia
Institute of Automation and Electrometry, Russian Academy of Sciences, Novosibirsk, 630090, Russia
Department of Molecular Electronics, Federal Research Center Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, 660036, Russia
Institute of Fundamental Biology and Biotechnology, Siberian Federal University, Krasnoyarsk, 660041, Russia

Доп.точки доступа:
Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Chimitova, O.D.; Pankin, D.V.; Popov, Z.I.; Sukhanova, E.V.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Adichtchev, S.V.; Pugachev, A.M.; Nemtsev, I. V.; Немцев, Иван Васильевич
}
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Tamm plasmon polariton-based planar hot-electron photodetector for the near-infrared region / Yu. V. Konov, D. A. Pykhtin, R. G. Bikbaev, I. V. Timofeev // Nanoscale. - 2024, DOI 10.1039/D4NR00710G. - Cited References: 36 . - Article in press. - ISSN 2040-3364. - ISSN 2040-3372
Аннотация: Light-trapping devices have always been a topic of intense interest among researchers. One such device that has gained attention is the hot-electron photodetector with a tunable detection wavelength. Photodetectors based on plasmon nanostructures that provide excitation of surface plasmon polaritons are challenging to manufacture. To address this issue, a planar hot-electron photodetector based on a Tamm plasmon polariton localized in a metal–semiconductor-multilayer mirror structure has been proposed in this study. The parameters and materials of the structure were adjusted to ensure perfect absorption at the resonance wavelength. As a result, the photoresponsivity of the proposed device can reach 42.6 mA W−1 at 905 nm. For the first time, the photosensitivity was calculated analytically by solving the dispersion law for the Tamm plasmon polariton.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Siberian Federal University, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Konov, Yu. V.; Конов, Юрий В.; Pykhtin, D. A.; Пыхтин, Дмитрий А.; Bikbaev, R. G.; Бикбаев, Рашид Гельмединович; Timofeev, I. V.; Тимофеев, Иван Владимирович
}
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    Regulating Eu2+ multisite occupation through structural disorder toward broadband near-infrared emission / Y. Zhu, X. Wang, J. Qiao [et al.] // Chem. Mater. - 2023. - Vol. 35, Is. 3. - P. 1432-1439, DOI 10.1021/acs.chemmater.2c03631. - Cited References: 33. - This research was supported by the National Key Research and Development Program of China (2021YFB3500400 and 2021YFE0105700), the National Natural Science Foundations of China (Grant Nos. 51972118, 11974022, and 52102169), the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program (2017BT01X137), the China Postdoctoral Science Foundation (2021M691053), and the Young Elite Scientists Sponsorship Program by China Association for Science and Technology (No. YESS20200053) . - ISSN 0897-4756. - ISSN 1520-5002
   Перевод заглавия: Регулирование Eu2+ допирования во многих кристаллографических позициях посредством структурного беспорядка для широкополосного излучения в ближнем инфракрасном диапазоне
Аннотация: To promote the development of near-infrared (NIR) light sources in optoelectronic and biomedical applications, the discovery of NIR-emitting phosphor materials and their design principles are essential. Herein, we report a novel Eu2+-activated broadband NIR-emitting phosphor, BaSrGa4O8:Eu2+, which features multisite occupation due to Ba/Sr and oxygen site occupancy disorder. With an increase in the Ba/Sr atomic ratio from 1:1 to 1.7:0.3, the Eu2+ emission band maximum red-shifts from 670 to 775 nm, along with an enlargement of the full width at half-maximum (FWHM) from 140 to 230 nm. The underlying mechanism for the structure–property relationship is elucidated using density functional theory calculations. The application of the NIR phosphor-converted light-emitting diodes (pc-LEDs) is demonstrated, showing their potential in night-vision technology. Our results can initiate further exploitation of the host structural disorder toward Eu2+ broadband NIR luminescence for applications in pc-LEDs.

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Держатели документа:
The State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China
Anhui Key Laboratory of Optoelectric Materials Science and Technology, Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Normal University, Wuhu, Anhui 241000, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
Institute of Engineering Physics and Radioelectronics, Siberian Federal University, Krasnoyarsk 660041, Russia
Department of Physics, Far Eastern State Transport University, Khabarovsk 680021, Russia
Department of Physics, University of the Free State, P.O. Box 339, Bloemfontein ZA-9300, South Africa
Department of Physics, South China University of Technology, Guangzhou 510641, China

Доп.точки доступа:
Zhu, Yingze; Wang, Xuesong; Qiao, Jianwei; Molokeev, M. S.; Молокеев, Максим Сергеевич; Swart, Hendrik C.; Ning, Lixin; Xia, Zhiguo
}
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    Double-site occupation triggered broadband and tunable NIR-I and NIR-II luminescence in AlNbO4:Cr3+ phosphors / K. Lyu, G. Liu, M. S. Molokeev, Z. Xia // Adv. Phys. Res. - 2023. - Vol. 2, Is. 4. - Ст. 2200056, DOI 10.1002/apxr.202200056. - Cited References: 38. - This research was supported by the International Cooperation Project of the National Key Research and Development Program of China (2021YFB3500400 and 2021YFE0105700), National Natural Science Foundations of China (Grant No. 51972118), Guangzhou Science & Technology Project (202007020005), the State Key Laboratory of Luminescent Materials and Devices (Skllmd-2022-02), and the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program (2017BT01×137). This work was also funded by RFBR according to the research project No. 19-52-80003 . - ISSN 2751-1200
   Перевод заглавия: Широкополосная и перестраиваемая люминесценция NIR-I и NIR-II в люминофорах AlNbO4:Cr3+, запускаемая заселением двух позиций в кристалле
Кл.слова (ненормированные):
near-infrared luminescence -- phosphor -- site occupation -- tunable emissions
Аннотация: Near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs) are desired for optoelectronic and biomedical applications, while the development of target broadband NIR phosphors still remains a significant challenge. Herein, a kind of Cr3+-doped AlNbO4 phosphors with a broad NIR emission ranging from 650 to 1400 nm under 450 nm excitation are reported. A giant red-shift emission peak from 866 to 1020 nm together with broadened full width at half-maximum of 320 nm is achieved simply by varying the doped Cr3+ concentrations. Structural and spectroscopy analysis demonstrate that a concentration-dependent site-occupation of Cr3+ emitters in different Al3+ sites is responsible for the tunable NIR luminescence. The as-fabricated NIR pc-LED based on optimized AlNbO4:Cr3+ phosphor exhibits great potential in night-vision applications. This work provides a novel design principle on the Cr3+-doped AlNbO4 phosphor with tunable broadband luminescence from NIR-I to NIR-II, and these materials can be employed in NIR spectroscopy applications.

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Держатели документа:
The State Key Laboratory of Luminescent Materials and Devices Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, School of Materials Science and Engineering South China University of Technology, Guangzhou 510641, P. R. China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
Department of Engineering Physics and Radioelectronic, Siberian Federal University, Krasnoyarsk 660041, Russia
Research and Development Department, Kemerovo State University, Kemerovo 650000, Russia
School of Physics and Optoelectronics, South China University of Technology, Guangzhou 510641, P. R. China

Доп.точки доступа:
Lyu, Kuangnan; Liu, Gaochao; Molokeev, M. S.; Молокеев, Максим Сергеевич; Xia, Zhiguo
}
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    Evolution of structures and optical properties in a series of infrared nonlinear optical crystals LixAg1–xInSe2 (0 ≤ x ≤ 1) / L. Isaenko, L. Dong, K. Korzhneva [et al.] // Inorg. Chem. - 2023. - Vol. 62, Is. 39. - P. 15936-15942, DOI 10.1021/acs.inorgchem.3c01993. - Cited References: 27. - This work was supported by the National Natural Science Foundation of China (Grant No. 22133004), Russian Science Foundation, grant # 19-12-00085-P (crystal growth, crystal structure analysis, band gap measurement), Ministry of Education and Science of the Russian Federation, grant FSUS-2020-0036 (SHG coefficients measurements), and partly done on state assignment of IGM SB RAS No. 122041400031-2 (composition chemical analysis) . - ISSN 0020-1669. - ISSN 1520-510X
   Перевод заглавия: Эволюция структур и оптических свойств в серии инфракрасных нелинейно-оптических кристаллов LixAg1–xInSe2 (0 ≤ x ≤ 1)
Аннотация: In this work, a number of new infrared nonlinear optical (NLO) crystals of LixAg1–xInSe2, in which the ratio x of Li/Ag varies in a wide range from 0 to 1, are investigated. Structural analysis reveals that the space group of LixAg1–xInSe2 evolved from I4̅2d in AgInSe2 to Pna21 in LiInSe2 as x increases from low values (0, 0.2, 0.37) to large values (0.55, 0.78, 0.81, 1). Compared to other Li/Ag coexisting chalcogenides such as LixAg1–xGaS2 and LixAg1–xGaSe2, the structural distortions in LixAg1–xInSe2 are much more prominent. This may explain the limited crystallization region in the phase graph of the tetragonal structure LixAg1–xInSe2. The fundamental optical absorption edges in these LixAg1–xInSe2 compounds are determined from the direct electronic transitions and the band gaps Eg gradually increase as the lithium content increases, consistent with the first-principles calculations. The composition x = 0.78 is calculated to have a good set of optical properties with a large NLO coefficient (dpowder = 28.8 pm/V) and moderate birefringence (Δn ∼ 0.04). Accordingly, the Li0.78Ag0.22InSe2 crystal is grown by the modified Bridgman–Stockbarger method, and it exhibits a wide transparency range from 0.546 to 14.3 μm at the 2% transmittance level.

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Держатели документа:
Novosibirsk State University, Novosibirsk 630090, Russia
Sobolev Institute of Geology and Mineralogy SB RAS, Novosibirsk 630090, Russia
Functional Crystals Lab, Technical Institute of Physics and Chemistry CAS, Beijing 100190, China
University of Chinese Academy of Sciences, Beijing 100049, China
Nikolaev Institute of Inorganic Chemistry SB RAS, Novosibirsk 630090, Russia
Department of Physics, Far Eastern State Transport University, Khabarovsk 680021, Russia
Laboratory of Crystal Physics, Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russian
Laboratory of Theory and Optimization of Chemical and Technological Processes, University of Tyumen, Tyumen 625003, Russia

Доп.точки доступа:
Isaenko, Lyudmila; Dong, Linfeng; Korzhneva, Ksenia; Yelisseyev, Alexander; Lobanov, Sergey; Gromilov, Sergey; Molokeev, Maxim S.; Kurus, Alexey; Lin, Zheshuai
}
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    Infrared bound states in the continuum: random forest method / M. S. Molokeev, A. S. Kostyukov, A. E. Ershov [et al.] // Opt. Lett. - 2023. - Vol. 48, Is. 17. - P. 4460-4463, DOI 10.1364/OL.494629. - Cited References: 42. - Ministry of Science and Higher Education of the Russian Federation (FSRZ-2023-0006) . - ISSN 0146-9592. - ISSN 1539-4794
   Перевод заглавия: Инфракрасные связанные состояния в континууме: метод случайного леса
Кл.слова (ненормированные):
Field enhancement -- Infrared radiation -- Neural networks -- Refractive index -- Second harmonic generation -- Subwavelength gratings
Аннотация: In this Letter, we consider optical bound states in the continuum (BICs) in the infrared range supported by an all-dielectric metasurface in the form of subwavelength dielectric grating. We apply the random forest machine learning method to predict the frequency of the BICs as dependent on the optical and geometric parameters of the metasurface. It is found that the machine learning approach outperforms the standard least square method at the size of the dataset of ≈4000 specimens. It is shown that the random forest approach can be applied for predicting the subband in the infrared spectrum into which the BIC falls. The important feature parameters that affect the BIC wavelength are identified.

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Держатели документа:
IRC SQC, Siberian Federal University, Krasnoyarsk, 660041, Russia
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russia
Laboratory of Theory and Optimization of Chemical and Technological Processes, University of Tyumen, Tyumen, 625003, Russia
Institute of Computational Modelling SB RAS, Krasnoyarsk, 660036, Russia

Доп.точки доступа:
Molokeev, M. S.; Молокеев, Максим Сергеевич; Kostyukov, A. S.; Ershov, A. E.; Maksimov, D. N.; Максимов, Дмитрий Николаевич; Gerasimov, V. S.; Polyutov, S. P.
}
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10.

    Modulation of Bi3+ luminescence from broadband green to broadband deep red in Lu2WO6 by Gd3+ doping and its applications in high color rendering index white LED and near-infrared LED / X. Wang, X. Feng, M. S. Molokeev [и др.] // Dalton Trans. - 2023. - Vol. 52, Is. 9. - P. 2619-2630, DOI 10.1039/D2DT03751C. - Cited References: 4. - This work is supported in part by the Project of Education Department of Liaoning Province (Grant No. LQ2019014) and he Natural Science Foundation of Liaoning Province (Grant No. 2020-MS-286). The authors are thankful for the support for the 4B9A Beamline from the Beijing Synchrotron Radiation Facility (BSRF) (Project No. 2021-BEPC-PT-005290). The authors would like to thank Siqi Liu from Shiyanjia Lab ( . - ISSN 1477-9226. - ISSN 1477-9234
   Перевод заглавия: Модуляция люминесценции Bi3+ от широкополосного зеленого до широкополосного темно-красного в Lu2WO6 с помощью легирования Gd3+ и его применение в белых светодиодах с высоким индексом цветопередачи и светодиодах ближнего инфракрасного диапазона
Аннотация: Phosphors that exhibit tunable broadband emissions are highly desired in multi-functional LEDs, including pc-WLEDs and pc-NIR LEDs. In this work, broadband emissions were obtained and modulated in the unexpectedly wide spectral range of 517–609 nm for (Lu0.99−xGdxBi0.01)2WO6 phosphors by tuning the Gd3+ content (x = 0–0.99). The effects of Gd3+ doping on phase constituents, particle morphology, crystal structure, and photoluminescence were systematically investigated. Broadband green emission was obtained from Gd3+-free (Lu0.99Bi0.01)2WO6 phosphors (x = 0), whose emission intensity was enhanced by 50% with 5 at% Gd3+ (x = 0.05). The phase transition happened when x 0.50 and the broadband red-NIR emission was obtained when x = 0.75–0.99. Three luminescence centers were proved to be responsible for the broadband green emissions via crystal structure, spectral fitting and fluorescence decay analysis. A pc-WLED with a high color rendering index (Ra = 91.3), a stable emission color, and a low color temperature (3951 K) was fabricated from the (Lu0.94Gd0.05Bi0.01)2WO6 broadband green phosphor, and an LED device that simultaneously emits high color rendering index white light and NIR light was obtained with the (Gd0.99Bi0.01)2WO6 broadband red-NIR phosphor. Night vision and noninvasive imaging were also demonstrated using the latter LED device.

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Держатели документа:
College of Chemistry and Materials Engineering, Bohai University, Jinzhou, Liaoning 121007, China
Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan
Laboratory of Crystal Physics, Kirensky Institute of Physics, FRC KSC SB RAS, Krasnoyarsk 660036, Russia
Research and Development Department, Kemerovo State University, Kemerovo 650000, Russia
Siberian Federal University, Krasnoyarsk 660041, Russia
Jilin Engineering Laboratory for Quantum Information Technology, Institute for Interdisciplinary Quantum Information Technology, Jilin Engineering Normal University, Changchun 130052, China

Доп.точки доступа:
Wang, Xuejiao; Feng, Xiaowen; Molokeev, M. S.; Молокеев, Максим Сергеевич; Zheng, Huiling; Wang, Qiushi; Xu, Chunyan; Li, Ji-Guang
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