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A closed ecological system as a means of providing high quality of life in an antarctic station and as a model of a life-support system for the martian mission / A. A. Tikhomirov, I. I. Gitelzon, S. A. Ushakova [et al.] // 55th International Astronautical Congress : proceedings. - 2004. - Ст. IAC-04-G.4.03. - Bibliogr. at the end of the art.

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Держатели документа:
Institute of Biophysics, Russian Academy of Sciences

Доп.точки доступа:
Gitelzon, I. I.; Гительзон, Иосиф Исаевич; Bartsev, S. I.; Барцев, Сергей Игоревич; Okhonin, V. A.; Охонин, Виктор Александрович; Mezhevikin, V. V.; Межевикин, Владислав Валентинович; International Astronautical Congress(55 ; 2004 ; Oct. 4-8 ; Vancouver, Canada); Международный конгресс по астронавтике(55 ; 2004 ; 4-8 окт. ; Ванкувер, Канада)
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ALD stripline resonator and bandpass filters for VHF and UHF bands / B. Belyaev, A. Serzhantov, Y. Balva [et al.] // 2021 IEEE MTT-S International Microwave Filter Workshop, IMFW 2021 : Institute of Electrical and Electronics Engineers, 2021. - 2021 IEEE MTT-S International Microwave Filter Workshop, IMFW 2021 (17 - 19 November 2021, Perugia, Italy) Conference code: 175723. - P. 65-68, DOI 10.1109/IMFW49589.2021.9642365. - Cited References: 15
Кл.слова (ненормированные):
stripline resonator -- quality factor -- bandpass filter -- atomic-layer deposition
Аннотация: It is shown that for an optimal substrate thickness ALD technology will be promising for IF bandpass filter designing. A two-conductor stripline ALD resonator with central frequency 200 MHz will have Q-factor 53 with total length 3.7 mm (0.0025λg) and the frequency separation of the first and the second oscillation modes up to 59. Two bandpass filters for VHF and UHF designed and fabricated for commercial application display good agreement between the simulation and the experiment. A 3-pole bandpass filter with central frequency 255 MHz and lateral size 15.8×3.2 mm2 has stopband width 13.5f0 , and a 6-pole bandpass filter with central frequency 1250 MHz and lateral size 4.4×5.1 mm2 has stopband width 9.4f0.

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Держатели документа:
Kirensky Institute of Physics Sb Ras, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Belyaev, B. A.; Беляев, Борис Афанасьевич; Serzhantov, A.; Balva, Y. F.; Бальва, Ярослав Федорович; Galeev, R.; Lemberg, K.; Leksikov, An. A.; Лексиков, Андрей Александрович; IEEE MTT-S International Microwave Filter Workshop 2021(17 - 19 November 2021 ; Perugia, Italy)
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Angle-resolved reflection spectroscopy of high-quality PMMA opal crystal / I. V. Nemtsev [et al.] // Photonics Nanostruc. Fundam. Appl. - 2018. - Vol. 28. - P. 37-44, DOI 10.1016/j.photonics.2017.11.007. - Cited References: 72. - This study was supported by the Russian Foundation for Basic Research (Grant No. 16-32-00302 мол_а ), by the Council for Grants of the President of the Russian Federation ( SP-317.2015.1 ), by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project No. 16-42-243059 р_мол_а and No. 16-48-242092 р_офи_м, and by the Program of Foundation for Promotion of Small Enterprises in Science and Technology (No.6662ГУ2015) (“УМНИК” program). We acknowledge the support of Krasnoyarsk Regional Center for Collective Use of SB of RAS for equipment and technique. We thank A. V. Shabanov and O. V. Shabanova for assistance in dispersion preparation. We also thank V. G. Myagkov for useful discussion of the results. . - ISSN 1569-4410
Кл.слова (ненормированные):
PMMA opal -- Photonic crystal -- Electron microscopy -- Angular resolved reflective spectroscopy
Аннотация: PMMA opal crystal was prepared by a simple hybrid method, which includes sedimentation, meniscus formation and evaporation. We investigated three surfaces of this crystal by angle-resolved reflective light spectroscopy and SEM study. The angle-resolved reflective measurements were carried out in the 400–1100 nm range. We have determined the high-quality ordered surface of the crystal region. Narrow particle size distribution of the surface has been revealed. The average particle diameter obtained with SEM was nearly 361 nm. The most interesting result was that reflectivity of the surface turned out up to 98% at normal light incidence. Using a fit of dependences of the maximum reflectivity wavelength from an angle based on the Bragg–Snell law, the wavelength of maximum 0° reflectivity, the particle diameter and the fill factor have been determined. For the best surface maximum reflectivity wavelength of a 0° angle was estimated to be 869 nm. The particle diameter and fill factor were calculated as 372 nm and 0.8715, respectively. The diameter obtained by fitting is in excellent agreement with the particle diameter obtained with SEM. The reflectivity maximum is assumed to increase significantly when increasing the fill factor. We believe that using our simple approach to manufacture PMMA opal crystals will significantly increase the fabrication of high-quality photonic crystal templates and thin films

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Держатели документа:
Federal Research Centre Krasnoyarsk Scientific Center of the Siberian Branch of Russian Academy of Sciences, Akademgorodok 50, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, Federal Research Centre Krasnoyarsk Scientific Center of the Siberian Branch of Russian Academy of Sciences, Akademgorodok 50, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Nemtsev, I. V.; Немцев, Иван Васильевич; Tambasov, I. A.; Тамбасов, Игорь Анатольевич; Ivanenko, A. A.; Иваненко, Александр Анатольевич; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич
}
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Belyaev, B. A.
An X-band magnetically tunable bandpass filter based on novel waveguide cavity resonator / B. A. Belayev, K. V. Lemberg, A. M. Serzhantov // Asia-Pacific Microwave Conference Proceedings, APMC 2016 : Institute of Electrical and Electronics Engineers Inc., 2017, DOI 10.1109/APMC.2016.7931355. - Cited References: 12
Кл.слова (ненормированные):
Bandpass filters -- Cavity resonators -- Waveguides -- Operating modes -- Relative bandwidth -- Tunable band-pass filters -- Tunable frequency -- Tunable wave-guides -- Two-pole filters -- Unloaded quality factors -- Waveguide cavity resonators -- Waveguide filters
Аннотация: This paper presents a ferrite tunable waveguide filter showing high Qu and high tunability in X-band. A new type of waveguide cavity resonator with an H102 operating mode was proposed for the creation of a low-loss, two-pole filter. The filter results in an insertion loss of 3.6-4.1 dB over the tuning range 8.74-9.63 GHz with a relative bandwidth of 0.92-0.79% and biasing magnetic field 0-600 Oe. This design demonstrates an unloaded quality factor of 380-396 over the tunable frequency range. © 2016 IEEE.

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Доп.точки доступа:
Lemberg, K. V.; Serzhantov, A. M.; Сержантов, Алексей Михайлович; Беляев, Борис Афанасьевич; Asia-Pacific Microwave Conference(2016 ; Dec. ; New Delhi)
}
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    Belyaev, B. A.
    Analysis of the quality factor of the optical half-wavelength resonator / B. A. Belyaev, V. V. Tyurnev // Microwave Opt. Techn. Lett. - 2013. - Vol. 55, Is. 7. - P. 1613-1616DOI 10.1002/mop.27662
   Перевод заглавия: Анализ добротности оптического полуволнового резонатора
Аннотация: An electrodynamic analysis of an optical resonator comprising a half-wavelength dielectric layer that is covered from both sides by quarter-wavelength layers with higher and lower refractive indices (RIs) is carried out.For such a resonator, the dependences of the external quality factor on number and RIs of the layers are obtained first. That allows one to determine minimum number of the layers in the structure to achieve the required quality factor at practically any contrast of the RIs. The results of this study provide an easy way to optimize the structures of 1D photonic crystal devices, particularly high-selectivity bandpass filters.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk, Russia
Reshetnev Siberian State Aerosp Univ, Krasnoyarsk, Russia
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk, Russia

Доп.точки доступа:
Tyurnev, V. V.; Тюрнев, Владимир Вениаминович; Беляев, Борис Афанасьевич
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    Biodegradable microcarriers for herbicide delivery / S. Thomas, R. V, H. J. Maria [и др.] // Биотехнология новых материалов - окружающая среда - качество жизни : материалы IV Международной научной конференция : Красноярск, 10–13 октября 2021 г. - Красноярск, 2021. - С. 156-159
   Перевод заглавия: Биоразлагаемые микроносители для доставки гербицидов

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Доп.точки доступа:
Thomas, S.; V, R.; Maria, H. J.; Kiselev, E. G.; Киселев, Евгений Геннадьевич; Nemtsev, I. V.; Немцев, Иван Васильевич; "Biotechnology of new materials - environment - quality of life", International scientific conference(4 ; 2021 ; Oct. ; Krasnoyarsk (on-line)); "Биотехнология новых материалов - окружающая среда - качество жизни", международная научная конференция(4 ; 2021 ; окт. ; Красноярск (on-line)); Сибирский федеральный университет
}
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Bulgakov, E. N.
Interaction between dielectric particles enhances the Q factor. / E. N. Bulgakov, K. N. Pichugin, A. F. Sadreev // Journal of Physics: Conference Series. - 2020. - Vol. 1461, Is. 1. - Ст. 012144, DOI 10.1088/1742-6596/1461/1/012144. - Cited References: 22. - This work was supported by Russian Science Foundation through Grant 19-02-00055. A. S. thanks A. Bogdanov for numerous and fruitful discussions
Кл.слова (ненормированные):
Anti-symmetric -- Avoided crossings -- Dielectric particles -- Identical particles -- Individual particles -- Quality factors -- Strong enhancement -- Two particles -- Q factor measurement
Аннотация: We consider resonant modes of two dielectric identical particles which can be classified as symmetric and anti symmetric combinations of the resonant modes of individual particles. We show that an approaching of two particles gives rise to an avoided crossing of resonant poles because of interaction between the disks. That in turn results in strong enhancement of the quality factor factor of two disks compared to isolated disks.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center, KSC SB RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Pichugin, K. N.; Пичугин, Константин Николаевич; Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич; International Conference on Metamaterials and Nanophotonics(4 ; 2019 ; 15 - 19 July ; St. Petersburg, Russian Federation)
}
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Elastic anharmonicity and elastic constants temperature dependences of different quality quartz crystals / B. P. Sorokin [et al.] // Proc Annu IEEE Int Freq Control Symp. - 2000. - P. 410-415 . - ISBN 0161-6404
Кл.слова (ненормированные):
Acoustic bulk wave devices -- Acoustic wave propagation -- Elastic moduli -- Pressure effects -- Quartz -- Thermal effects -- Crystal quality -- Elastic anharmonicity -- Mechanical pressure -- Second order elastic constant -- Temperature coefficients -- Crystal structure
Аннотация: SOEC temperature dependences of different quality quartz crystals were studied. The simplified phenomenological theory was applied to calculate second order elastic constant temperature dependences. The bulk acoustic waves propagation under the bias of temperature field or of the uniaxial mechanical pressure was considered. It was found that crystal quality changes have caused certain variations of some third order elastic constant values and some temperature coefficients.

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Доп.точки доступа:
Sorokin, B. P.; Glushkov, D. A.; Turchin, P. P.; Michailyuta, S. V.; Aleksandrov, K. S.; Александров, Кирилл Сергеевич; Doubovsky, A. B.; IEEE Annual frequency control symposium(54 ; 2000 ; Jun. ; 7-9 ; Kansas)
}
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    Enhanced cyan emission and optical tuning of Ca3Ga4O9:Bi3+ for high-quality full-spectrum white light-emitting diodes / D. J. Liu, X. H. Yun, G. G. Li [et al.] // Adv. Opt. Mater. - 2020. - Vol. 8, Is. 22. - Ст. 2001037, DOI 10.1002/adom.202001037. - Cited References: 55. - This work was financially supported by the National Natural Science Foundation of China (NSFC No. 51932009, 51720105015, 51672265, 51672266, 51672257 and 51672259), the Key Research Program of Frontier Sciences, CAS (Grant No. YZDY-SSW-JSC018), Science and Technology Cooperation Project between Chinese and Australian Governments (2017YFE0132300), the Jiangmen Innovative Research Team Program (2017), and the Major Program of Basic Research and Applied Research of Guangdong Province (2017KZDXM083) . - ISSN 2195-1071
   Перевод заглавия: Улучшенное голубое излучение и оптическая настройка Ca3Ga4O9:Bi3+ для получения высококачественных белых светодиодов полного спектра

РУБ Materials Science, Multidisciplinary + Optics
Рубрики:
ENERGY-TRANSFER
   TUNABLE LUMINESCENCE
   PHOSPHOR
   CRYSTAL
   MODULATION
Кл.слова (ненормированные):
cyan-emitting phosphors -- full-spectrum white lighting -- optical tuning -- single-phased white light-emitting diodes
Аннотация: Highly efficient cyan‐emitting phosphor materials are indispensable for closing the cyan gap in spectra of the traditional phosphor‐converted white light‐emitting diodes (WLEDs) to achieve high‐quality full‐spectrum white lighting. In this work, bright cyan‐emitting Ca3Ga4O9 (CGO):0.02Bi3+,0.07Zn2+ phosphor is developed to bridge the cyan gap. Such a Bi3+,Zn2+ codoping enhances the cyan emission of CGO:0.02Bi3+ by 4.1 times due to the influence of morphology and size of phosphor particles, charge compensation and lattice distortion. Interestingly, codoping La3+ ions into the current system can achieve a photoluminescence tuning of CGO:0.02Bi3+ from cyan to yellowish‐green by crystallographic site engineering. Besides, Bi3+–Eu3+ energy transfer is successfully realized in CGO:0.02Bi3+,0.07Zn2+,nEu3+ phosphors and the emission color tuning from cyan to orange is observed. The investigation of thermal quenching behaviors reveals that the incorporation of Zn2+ and La3+ improves the thermal stability of CGO:0.02Bi3+. Finally, CGO:0.02Bi3+,0.07Zn2+,0.10Eu3+ phosphor is employed to obtain a single‐phased warm WLED device. A full‐spectrum WLED device with remarkable color rendering index (Ra) of 97.4 and high luminous efficiency of 69.72 lm W−1 is generated by utilizing CGO:0.02Bi3+,0.07Zn2+ phosphor. This result suggests the important effect of CGO:0.02Bi3+,0.07Zn2+ phosphor on closing the cyan gap, providing new insights of cyan‐emitting phosphors applied in full‐spectrum white lighting.

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Держатели документа:
Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, Changchun 130022, Peoples R China.
Univ Sci & Technol China, Sch Appl Chem & Engn, Hefei 230026, Peoples R China.
China Univ Geosci, Fac Mat Sci & Chem, Engn Res Ctr Nanogeomat, Minist Educ, Wuhan 430074, Peoples R China.
RAS, SB, Lab Crystal Phys, Kirensky Inst Phys,Fed Res Ctr,KSC, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Dept Engn Phys & Radioelect, Krasnoyarsk 660041, Russia.
Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia.
Shandong Univ, Sch Mat Sci & Engn, Jinan 266071, Peoples R China.
Wuyi Univ, Sch Appl Phys & Mat, Jiangmen 529020, Guangdong, Peoples R China.

Доп.точки доступа:
Liu, Dongjie; Yun, Xiaohan; Li, Guogang; Dang, Peipei; Molokeev, M. S.; Молокеев, Максим Сергеевич; Lian, Hongzhou; Shang, Mengmeng; Lin, Jun
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10.

High-quality compact interdigital microstrip resonator and its application to bandpass filter / B. Belyaev [et al.] // Prog. Electromagn. Res. C : Proceedings. - 2017. - Vol. 72. - P. 91-103. - Cited References: 27 . - ISSN 1937-8718
Кл.слова (ненормированные):
Alumina -- Bandpass filters -- Bandwidth -- Microwave filters -- Q factor measurement -- Resonators -- Alumina substrates -- Central frequency -- Fractional bandwidths -- Interdigital structures -- ITS applications -- Microstrip resonator -- Number of fingers -- Unloaded quality factors -- Microstrip filters
Аннотация: A compact microstrip resonator based on the interdigital structure is proposed. The resonator has several times higher unloaded quality factor compared to similar resonators presented previously and can even reach the Q-factor of a regular λ/4 resonator. The size of the resonator can be significantly reduced with a substantial increase in quality factor by incrementing the number of fingers in the interdigital structure. In addition, for each gap between the fingers, there exist an optimal number of fingers that correspond to the maximum Q-factor. An extension of the upper stopband for a bandpass filter designed using the resonator can be achieved by the interconnection of the fingers in each of the comb structures. The simulation results are proven by fabricated resonators and a fourpole bandpass filter. For the central frequency of 2000 MHz and 16.2% fractional bandwidth, the lateral size of the filter is only 11.5mm × 3.8 mm for alumina substrate (eps = 9.8). The filter has an upper stopband up to 5.8f0 at the level −40 dB.

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Держатели документа:
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Belyaev, B. A.; Беляев, Борис Афанасьевич; Serzhantov, A.; Leksikov, Al. A.; Лексиков, Александр Александрович; Bal'va, Y. F.; Бальва, Ярослав Федорович; Leksikov, An. A.; Лексиков, Андрей Александрович
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11.

Laser processing of polymer films fabricated from phas differing in their monomer composition / T. G. Volova, A. I. Golubev, I. V. Nemtsev [и др.] // Биотехнология новых материалов - окружающая среда - качество жизни : материалы IV Международной научной конференция : Красноярск, 10–13 октября 2021 г. - Красноярск, 2021. - С. 51-54

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Доп.точки доступа:
Volova, T. G.; Волова, Татьяна Григорьевна; Golubev, A. I.; Голубев Алексей И.; Nemtsev, I. V.; Немцев, Иван Васильевич; Lukyanenko, A. V.; Лукьяненко, Анна Витальевна; Dudaev, A. E.; Shishatskaya, E. I.; Шишацкая, Екатерина Игоревна; "Biotechnology of new materials - environment - quality of life", International scientific conference(4 ; 2021 ; Oct. ; Krasnoyarsk (on-line)); "Биотехнология новых материалов - окружающая среда - качество жизни", международная научная конференция(4 ; 2021 ; окт. ; Красноярск (on-line))
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12.

Morozov, E. V.
MRI monitoring and non-destructive quality measurement of polymeric patterns manufactured via stereolithography / E. V. Morozov, M. M. Novikov, V. M. Bouznik // Addit. Manuf. - 2016. - Vol. 12. - P. 16-24, DOI 10.1016/j.addma.2016.05.015 . - ISSN 2214-8604
Кл.слова (ненормированные):
Aging -- Build parameters -- MRI -- Polymers -- Stereolithography
Аннотация: The use of Magnetic Resonance Imaging (MRI) for monitoring, studying and performing output quality measurements of the acrylate-based polymeric patterns manufactured using stereolithography (SL) was introduced in this work. The effects of build parameters and humid environment on sample homogeneity, distribution of crosslink density, stability and defect formation were examined. The spatial resolution of the method was found to be sufficient to identify patterns according to the build parameters used and to detect specific hatch-predicted crosslink density variations. Qualitative information obtained using MRI visualisation was supplemented by quantitative measurements of Nuclear Magnetic Resonance (NMR) relaxation times and 1H NMR spectra. NMR spectroscopy confirmed the identity of the chemical composition among the patterns and showed that the crosslink density variation observed via spatially resolved T2-profiles stems from the difference of the build parameters. Different types of defects in the samples were observed and classified; some defects originated from local matrix continuity failures (partially cured resin trapping within the polymer or bubbles formation), while other defects were found in the form of bulk layering. MRI visualisation coupled with relaxometry and 1H spectroscopy of patterns during their interaction with humidity allowed tracking water distribution inside the sample and observing effects of swelling, fracturing and chemical decomposition. It was found that the initial inhomogeneous structure of the specimen has a crucial role in subsequent fracturing due to non-uniform expansion of the swollen parts. As a result, the approach presented in this work improves the output quality control and current testing techniques, provides insight how physical properties of the 3D parts are affected by different technical parameters, and eventually can help the use of SL technologies for a variety of applications. © 2016 Elsevier B.V.

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Держатели документа:
Kirensky Institute of Physics SB RAS, Krasnoyarsk, Russian Federation
Institute of Chemistry and Chemical Technology SB RAS, Krasnoyarsk, Russian Federation
Institute on Laser and Information Technologies RAS, Shatura, Russian Federation
All-Russian Scientific Research Institute of Aviation Materials, Moscow, Russian Federation

Доп.точки доступа:
Novikov, M. M.; Bouznik, V. M.; Морозов, Евгений Владимирович
}
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13.

Multifunctional RFe3(BO3)4 materials: Quality control / K. N. Boldyrev [et al.] ; ed. V. V. Samartsev [et al.] // EPJ Web of Conf. - 2015. - Vol. 103. - Ст. 09001, DOI 10.1051/epjconf/201510309001. - Cited References: 3. - This work was supported by the Russian Science Foundation (Grant № 14-12-01033) . - ISSN 2100-014X

РУБ Optics of Crystals + Optical Materials

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Доп.точки доступа:
Samartsev, V. V. \ed.\; Vinogradov, E.A. \ed.\; Naumov, A.V. \ed.\; Karimullin, K.R. \ed.\; Boldyrev, K. N.; Popova, M. N.; Molchanova, A. D.; Stanislavchuk, T. N.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Gudim, I. A.; Гудим, Ирина Анатольевна; International Workshop on Quantum Optics(12th ; Moscow)(Aug 11-16, 2015)
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14.

    Multiple strategies to approach high-efficiency luminescence controllable in blue/cyan/green-emitting Bi3+-activated phosphors / P. Gao, Q. Li, S. Li [et al.] // J. Phys. Chem. C. - 2022. - Vol. 126, Is. 21. - P. 9195-9206, DOI 10.1021/acs.jpcc.2c02560. - Cited References: 53. - The authors would like to gratefully acknowledge funds from the National Natural Science Foundation of China (grant no. 51974123), the Distinguished Youth Foundation of Hunan Province (grant no.2020JJ2018), the Key R&D projects in Hunan Province (2020WK2016, 2020SK2032, 2021SK2047, and 2022NK2044), the Natural Science Foundation of Hunan Province, China (grant no. 2021JJ40261), the Hunan High Level Talent Gathering Project (2019RS1077 and 2020RC5007), the Scientific Research Fund of Hunan Provincial Education Department (19C0903), the Natural Sciences Foundation of Hunan Agricultural University, China (grant no. 19QN11), the Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Resource Utilization Science Foundation (19KFXM12), the Changsha Science and Technology Plan (KH2005114, KH2201428), and the College Students’ Innovative Training (S202110537012) . - ISSN 1932-7447
   Перевод заглавия: Многочисленные стратегии достижения высокоэффективной управляемой люминесценции в синих/голубых/зеленых Bi3+-активированных люминофорах
Кл.слова (ненормированные):
Energy transfer -- Luminescence -- Blue phosphors -- Emitting phosphors -- High quality -- Higher efficiency -- Multiple strategy -- Optical tuning -- Performance -- Photoluminescence spectrum -- Red green blues -- White light emitting diodes
Аннотация: Cyan gap is a major block in achieving high-quality white light-emitting diodes (WLEDs). Hence, a novel cyan-emitting phosphor Sr2GdGaO5/0.02Bi3+ with optical tuning performance is synthesized based on the local crystal field regulation strategy surrounding the luminescence center. With the substitution of Al3+ for Ga3+, the photoluminescence (PL) spectra of Sr2GdGa1–xAlxO5/0.02Bi3+ (0 ≤ x ≤ 1) phosphors adjust from cyan (466 nm) to blue (450 nm). Moreover, such a Ba2+ doping adjusts the PL spectra of Sr2–xBaxGdGaO5/0.02Bi3+ (0 ≤ x ≤ 0.5) phosphors from cyan (466 nm) to green (482 nm). These phenomena are contributed to the crystal field splitting and nephelauxetic effect. The energy transfer from Bi3+ to Eu3+ is realized by co-doping Bi3+ and Eu3+ ions in the A2GdBO5/Bi3+ (A = Sr, Ba; B = Ga, Al) host materials, and two single-phase white phosphors Sr2GdGaO5/0.02Bi3+, 0.05Eu3+ and Sr1.5Ba0.5GdGaO5/0.02Bi3+, 0.05Eu3+ are obtained. Finally, a WLED with high color rendering index (Ra = 93.6) is prepared by using red/green/blue (RGB) phosphors and Sr2GdGaO5/0.02Bi3+ phosphor, which is higher than that of the WLED prepared by RGB phosphors (Ra = 86.7), indicating that Sr2GdGaO5/0.02Bi3+ phosphor can close the cyan gap. These results provide multiple strategies in achieving luminescence controllable and WLED.

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Держатели документа:
School of Chemistry and Materials Science, Hunan Agricultural University, Changsha, 410128, China
Hunan Optical Agriculture Engineering Technology Research Center, Changsha, 410128, China
College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Gao, P.; Li, Q.; Li, S.; Gai, S.; Li, Y.; Ma, Y.; Zhang, Z.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Zhou, Z.; Xia, M.
}
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15.

Novel high-quality compact microstrip resonator and its application to bandpass filter / B. A. Belyaev [et al.] // IEEE Microw. Wirel. Compon. Lett. - 2015. - Vol. 25, Is. 9. - P. 579-581, DOI 10.1109/LMWC.2015.2451363. - Cited References: 13. - This work was supported by the Ministry of Education and Science of the Russian Federation under State contract 14.607.21.0039. . - ISSN 1531-1309

РУБ Engineering, Electrical & Electronic

Кл.слова (ненормированные):
Bandpass filter (BPF) -- interdigital resonator -- microstrip -- microstrip resonator
Аннотация: A novel compact microstrip resonator based on interdigital structure is proposed. The resonator has several times higher quality factor than similar resonators presented earlier. It is shown that the size of the resonator can be significantly reduced with substantial increase in quality factor by incrementing the number of pins in the interdigital structure. A 4-pole bandpass filter with central frequency 900 MHz and an overall size 4.6 mm × 10.0 mm was designed and fabricated on the base of the proposed structure. The measured upper stopband of the filter was found to be up to 7.4fo at the level -40 dB.

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Доп.точки доступа:
Belyaev, B. A.; Беляев, Борис Афанасьевич; Serzhantov, A. M.; Сержантов, Алексей Михайлович; Leksikov, Al. A.; Лексиков, Александр Александрович; Bal'va, Y. F.; Бальва, Ярослав Федорович; Leksikov, An. A.; Лексиков, Андрей Александрович
}
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16.

Observation of an accidental bound state in the continuum in a chain of dielectric dIsks / M. S. Sidorenko, O. N. Sergaeva, Z. F. Sadrieva [et al.] // Phys. Rev. Appl. - 2021. - Vol. 15, Is. 3. - Ст. 034041, DOI 10.1103/PhysRevApplied.15.034041. - Cited References: 58. - The authors acknowledge Almas Sadreev for fruitful discussions. M.D.N. acknowledges financial support from the Government of the Russian Federation through the ITMO Fellowship and Professorship Program and thanks ITMO University for hospitality. C.R.-C. acknowledges funding from the MIT MISTI-Russia Program. This work is supported by the Russian Foundation for Basic Research (Grants No. 19-02-00419 and No. 20-52-12062), the grant of the President of the Russian Federation (MK-2224.2020.2), and the Foundation for the Advancement of Theoretical Physics and Mathematics BASIS . - ISSN 2331-7019
Кл.слова (ненормированные):
Dielectric disks -- Material absorption -- Near-field measurement -- Photonic systems -- Quality factors -- Radio frequencies -- Tight binding model -- Transmission spectrums -- Loop antennas
Аннотация: Being a general wave phenomenon, bound states in the continuum (BICs) appear in acoustic, hydrodynamic, and photonic systems of various dimensionalities. Here, we report the first experimental observation of an accidental electromagnetic BIC in a one-dimensional periodic chain of coaxial ceramic disks. We show that the accidental BIC manifests itself as a narrow peak in the transmission spectra of the chain placed between two loop antennas. We demonstrate a linear growth of the radiative quality factor of the BICs with the number of disks that is well described with the developed tight-binding model. We estimate the number of disks when the radiation losses become negligible in comparison to material absorption and, therefore, the chain can be considered as practically infinite. The presented analysis is supported by near-field measurements of the BIC profile. The obtained results provide useful guidelines for practical implementations of structures with BICs opening up horizons for the development of radio-frequency and optical metadevices.

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Держатели документа:
Department of Physics and Engineering, Itmo University, St. Petersburg, 197101, Russian Federation
Research Laboratory of Electronics, Massachusetts Institute of Technology, 50 Vassar Street, Cambridge, MA, United States
Kirensky Institute of Physics, Federal Research Center Ksc Sb Ras, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Sidorenko, M. S.; Sergaeva, O. N.; Sadrieva, Z. F.; Roques-Carmes, C.; Muraev, P. S.; Мураев, Павел Сергеевич; Maksimov, D. N.; Максимов, Дмитрий Николаевич; Bogdanov, A. A.
}
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17.

Pichugin, K. N.
Interaction between coaxial dielectric disks enhances the Q factor / K. N. Pichugin, A. F. Sadreev // J. Appl. Phys. - 2019. - Vol. 126, Is. 9. - Ст. 093105, DOI 10.1063/1.5094188. - Cited References: 32. - We are grateful to A. A. Bogdanov, E. N. Bulgakov, and D. N. Maksimov for numerous and fruitful discussions. This work was supported by the Russian Federation for Basic Research (RFBR) (Grant No. 19-02-00055) and Ministry of Education and Science of Russian Federation (State Contract No. 3.1845.2017). . - ISSN 0021-8979. - ISSN 1089-7550

РУБ Physics, Applied
Рубрики:
WHISPERING-GALLERY MODES
QUALITY-FACTOR
Аннотация: We study the behavior of resonant modes under variation of the distance between two coaxial dielectric disks and show an avoided crossing of resonances because of the interaction between the disks. Owing to coaxial arrangement of disks, the resonant modes are specified by the azimuthal index m = 0,1,2, ... . In the present paper, we consider the case m = 0. At a long enough distance, the modes are symmetric and antisymmetric hybridizations of the resonant modes of the isolated disk. With decreasing the distance, the interaction becomes stronger, giving rise to avoided crossings of different resonances of the isolated disk. This in turn enhances the Q factor of the two disks by one order in magnitude compared to the Q factor of the isolated disk.

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Держатели документа:
RAS, Fed Res Ctr KSC, Kirensky Inst Phys, SB, Krasnoyarsk 660036, Russia.
Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk 660037, Russia.

Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Пичугин, Константин Николаевич; Russian Federation for Basic Research (RFBR)Russian Foundation for Basic Research (RFBR) [19-02-00055]; Ministry of Education and Science of Russian FederationMinistry of Education and Science, Russian Federation [3.1845.2017]
}
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18.

Properties of films from degradable phas of different monomer compositions / T. G. Volova, E. G. Kiselev, A. E. Dudaev [и др.] // Биотехнология новых материалов - окружающая среда - качество жизни : материалы IV Международной научной конференция : Красноярск, 10–13 октября 2021 г. - Красноярск, 2021. - С. 40-44

Материалы конференции,
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Доп.точки доступа:
Volova, T. G.; Волова, Татьяна Григорьевна; Kiselev, E. G.; Киселев, Евгений Геннадьевич; Dudaev, A. E.; Nemtsev, I. V.; Немцев, Иван Васильевич; Lukyanenko, A. V.; Лукьяненко, Анна Витальевна; Sukovatyǐ, A. G.; Суковатый, Алексей Григорьевич; Ryltseva, G.; Shishatskaya, E. I.; Шишацкая, Екатерина Игоревна; "Biotechnology of new materials - environment - quality of life", International scientific conference(4 ; 2021 ; Oct. ; Krasnoyarsk (on-line)); "Биотехнология новых материалов - окружающая среда - качество жизни", международная научная конференция(4 ; 2021 ; окт. ; Красноярск (on-line)); Сибирский федеральный университет
}
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19.

Quality of the rare earth aluminum borate crystals for laser applications, probed by high-resolution spectroscopy of the Yb3+ ion / K. N. Boldyrev [et al.] // Opt. Mater. - 2012. - Vol. 34, Is. 11. - P. 1885-1889, DOI 10.1016/j.optmat.2012.05.021. - Cited References: 20. - This work was supported by the Russian Academy of Sciences under the Programs for Basic Research, the Russian Foundation for Basic research under Grants No 10-02-01071-a and No 09-02-00171-a, and by the Ministry of Education and Science under Grant HIII-4828.2012.2. . - ISSN 0925-3467

РУБ Materials Science, Multidisciplinary + Optics
Рубрики:
GROWTH
   Y1-XYBXAL3(BO3)4
   LUMINESCENCE
   FREQUENCY
   CENTERS
Кл.слова (ненормированные):
Ytterbium -- Aluminum borates -- Impurities -- High-resolution spectroscopy -- UV edge
Аннотация: A comparative study was performed of the low-temperature high-resolution absorption spectra of the Yb3+ probe in R1−xYbxAl3(BO3)4 (R = Y, Tm, Lu) crystals grown by flux technique independently in four different laboratories using different solvents. We show that the incorporation of solvent components into the crystal in the course of crystallization gives rise to spectral satellites of the Yb3+ 0(2F7/2) → 0′(2F5/2) absorption lines and assign particular satellites to the Yb3+ centers near the bismuth and molybdenum impurities (which decrease the transparency of YAB in the UV spectral range). We suggest this spectroscopic method for a rapid analysis of the quality of UV laser crystals and for improvement of growth technologies.

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Держатели документа:
[Boldyrev, K. N.
Popova, M. N.] RAS, Inst Spect, Troitsk 142190, Moscow Region, Russia
[Bettinelli, M.] Univ Verona, Dept Biotechnol, I-37134 Verona, Italy
[Bettinelli, M.] UdR Verona, INSTM, I-37134 Verona, Italy
[Temerov, V. L.
Gudim, I. A.
Bezmaternykh, L. N.] RAS, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Loiseau, P.
Aka, G.] ENSCP, CNRS, LCMCP, UMR 7574, F-75005 Paris, France
[Leonyuk, N. I.] Moscow MV Lomonosov State Univ, Fac Geol, Moscow 119899, Russia

Доп.точки доступа:
Boldyrev, K. N.; Popova, M. N.; Bettinelli, M.; Temerov, V. L.; Темеров, Владислав Леонидович; Gudim, Irina A.; Гудим, Ирина Анатольевна; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Loiseau, P.; Aka, G.; Leonyuk, N. I.
}
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20.

Study of the weak field sensor on the resonant microstrip structure with a thin ferromagnetic film / B. A. Belyaev [et al.] // Russ. Phys. J. - 2018. - Vol. 61, Is. 8. - P. 1367-1375, DOI 10.1007/s11182-018-1544-x. - Cited References: 19. - This research was performed with support of the Russian Ministry of Education and Science, project No. RFMEFI60417X0179. . - ISSN 1064-8887
Кл.слова (ненормированные):
microstrip resonator -- thin magnetic film -- frequency response -- sensor of weak magnetic fields -- quality factor -- scattering matrix -- magnetometer
Аннотация: The paper examines the characteristics of the miniature sensor of weak magnetic fields on the resonant microstrip structure with a thin ferromagnetic film. The authors calculated the frequency response of irregular microstrip resonator containing anisotropic magnetic film in quasi-static approximation. The resonator is connected to transmission lines via coupling capacities. The authors determined the optimal directional angles of the constant magnetic displacement field ensuring maximum sensitivity of the sensor. They examined the impact of angular and amplitude dispersion of uniaxial magnetic anisotropy of thin film upon the sensor characteristics. The regularities determined in this research qualitatively agree with the experimental results.

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Публикация на русском языке Исследование датчика слабых магнитных полей на резонансной микрополосковой структуре с тонкой ферромагнитной пленкой [Текст] / Б. А. Беляев [и др.] // Изв. вузов. Физика. - 2018. - Т. 61 № 8. - С. 3-10

Держатели документа:
L. V. Kirensky Institute of Physics of the Krasnoyarsk Research Center of the Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Belyaev, B. A.; Беляев, Борис Афанасьевич; Boev, N. M.; Боев, Никита Михайлович; Izotov, A. V.; Изотов, Андрей Викторович; Solovyev, P. N.; Соловьев, Платон Николаевич; Tyurnev, V. V.; Тюрнев, Владимир Вениаминович
}
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