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Size effects in the magnetic properties of ε-Fe2O3 nanoparticles / A. A. Dubrovskiy [et al.] // J. Appl. Phys. - 2015. - Vol. 118, Is. 21. - Ст. 213901, DOI 10.1063/1.4936838. - Cited References: 41. - We are grateful to Professor Yu. L. Raikher for useful discussions and M. A. Kazakova for the help in sample preparation. - This work was supported by Russian Federal Agency of Scientific Organizations (Project No. V.44.1.15) and scientific and educational center of energy-efficient catalysis of NSU . - ISSN 0021-8979

РУБ Physics, Applied
Рубрики:
FERROMAGNETIC-RESONANCE
   OXIDE NANOPARTICLES
   WAVE ABSORBER
   IRON
   TRANSITION
   TEMPERATURE
   PARTICLES
   PHASE
   FNANOWIRES
   FIELD
Аннотация: We report the results of comparative analysis of magnetic properties of the systems based on ε-Fe2O3, nanoparticles with different average sizes (from ∼3 to 9 nm) and dispersions. The experimental data for nanoparticles higher than 6-8 nm in size are consistent with the available data, specifically, the transition to the magnetically ordered state occurs at a temperature of ∼500 K and the anomalies of magnetic properties observed in the range of 80-150 K correspond to the magnetic transition. At the same time, Mossbauer and ferromagnetic resonance spectroscopy data as well as the results of static magnetic measurements show that at room temperature all the investigated samples contain ε-Fe2O3 particles that exhibit the superparamagnetic behavior. It was established that the magnetic properties of nanoparticles significantly change with a decrease in their size to ∼6 nm. According to high-resolution electron microscopy and Mossbauer spectroscopy data, the particle structure can be attributed to the ε-modification of trivalent iron oxide; meanwhile, the temperature of the magnetic order onset in these particles is increased, the well-known magnetic transition in the range of 80-150 K does not occur, the crystallographic magnetic anisotropy constant is significantly reduced, and the surface magnetic anisotropy plays a decisive role. This is apparently due to redistribution of cations over crystallographic positions with decreasing particle size, which was established using Mössbauer spectra. As the particle size is decreased and the fraction of surface atoms is increased, the contribution of an additional magnetic subsystem formed in a shell of particles smaller than ∼4 nm becomes significant, which manifests itself in the static magnetic measurements as paramagnetic contribution. © 2015 AIP Publishing LLC.

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Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk, Russian Federation
International Laboratory of High Magnetic Fields and Low Temperatures, Wroclaw, Poland
Siberian Federal University, Krasnoyarsk, Russian Federation
Boreskov Institute of Catalysis, Novosibirsk, Russian Federation
Novosibirsk State University, Novosibirsk, Russian Federation

Доп.точки доступа:
Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Balaev, A. D.; Балаев, Александр Дмитриевич; Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Bayukov, O. A.; Баюков, Олег Артемьевич; Pletnev, O. N.; Плетнев, Олег Николаевич; Yakushkin, S. S.; Bukhtiyarova, G. A.; Martyanov, O. N.
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Flexible film broadband absorber based on diamond-graphite mixture and polyethylene / A. A. Ivanenko [et al.] // Opt. Mater. - 2017. - Vol. 73. - P. 388-392, DOI 10.1016/j.optmat.2017.08.041. - Cited References: 54. - This study was supported by the Russian Foundation for Basic Research (Grants 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. . - ISSN 0925-3467
Кл.слова (ненормированные):
Flexible film broadband absorption -- Diamond-graphite mixture -- Polyethylene -- Reflectivity -- Transmittance
Аннотация: Flexible film broadband absorber based on diamond-graphite mixture and polyethylene was fabricated by hot pressing. The film thickness of the absorber was 90 μm. We have measured angular reflectivity, diffusional reflectivity and transmittance in the range 85–8000 cm−1 (117–1.25 μm) in order to determine the absorption. It was shown that room temperature pressing of mesh print with 250 μm step significantly reduces reflectivity of the absorber. The absorption was over 0.85 in the range 85–320 cm−1 (117–31.25 μm) and >0.98 in the range 320–8000 cm−1 (31.25–1.25 μm). We believe that the designed and manufactured absorber might become a promising material for optical devices where high broadband absorption and flexibility are required.

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

Доп.точки доступа:
Ivanenko, A. A.; Иваненко, Александр Анатольевич; Tambasov, I. A.; Тамбасов, Игорь Анатольевич; Pshenichnaia, A. A.; Пшеничная, Анастасия Александровна; Shestakov, N. P.; Шестаков, Николай Петрович
}
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Narrowband wavelength selective thermal emitters by confined tamm plasmon polaritons / Z. -Y. Yang [et al.] // ACS Photonics. - 2017. - Vol. 4, Is. 9. - P. 2212-2219, DOI 10.1021/acsphotonics.7b00408. - Cited References: 41. - This work was supported by the Ministry of Science and Technology (MOST), Taiwan, ROC (MOST 104-2221-E-009-130-MY3) . - ISSN 2330-4022
Кл.слова (ненормированные):
Narrowband absorber -- Tamm plasmon polaritons -- Thermal emission
Аннотация: This study experimentally demonstrates infrared wavelength selective thermal emission based on Tamm plasmon polaritons (TPPs). Unlike conventional TPP structures, which have a thin metal layer on a distributed Bragg reflector (DBR), the proposed structure has a thick metal under a DBR that is more robust for thermal radiation. The number of DBR pairs is a critical factor in maximizing the narrowband emission needed to satisfy the impedance matching condition, which varies with the choice of metal film. Optimum designs for four different metals, aluminum, gold, molybdenum, and tungsten, are presented. The temporal coupled-mode theory was introduced to explain the origin of the high Q-factor of the proposed structure, which can achieve a twice higher Q-factor for the measured emissivity compared to typical plasmonic thermal emitters. The structure is one-dimensional, consisting of only multilayers and free from nanopatterning, offering a practical design in applications such as gas sensing, narrowband IR sources, and thermophotovoltaics. © 2017 American Chemical Society.

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Держатели документа:
Institute of Lighting, Energy Photonics, United Kingdom
Institute of Imaging and Biomedical Photonics, National Chiao Tung University, 301 Gaofa 3rd Road, Tainan, Taiwan
International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, Japan
Institute of Engineering Physics and Radio Electronics, Russian Federation
Institute of Nanotechnology, Spectroscopy and Quantum Chemistry, Siberian Federal University, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Department of Condensed Matter Physics, Graduate School of Science, Hokkaido University, Kita-10 Nishi-8 Kita-ku, Sapporo, Japan

Доп.точки доступа:
Yang, Z. -Y.; Ishii, S.; Yokoyama, T.; Dao, T. D.; Sun, M. -G.; Pankin, P. S.; Timofeev, I. V.; Тимофеев, Иван Владимирович; Nagao, T.; Chen, K. -P.
}
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Experimental demonstration of broadband optical Tamm states in photonic crystal / S. E. Svyakhovskiy [et al.] // International Conference Laser Optics (ICLO 2018) : Proceedings. - 2018. - Ст. 8435505. - P. 309, DOI 10.1109/LO.2018.8435505. - Cited References: 3. - This paper is supported by Russian Foundation for Basic Research (16-02-01100), Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund (16-42-243065). . - ISBN 978-1-5386-3612-1
Кл.слова (ненормированные):
Photonic crystal -- Tamm state -- Plasmon-polariton -- Broadband absorber
Аннотация: We present the theoretical and experimental investigations of optical bound state at the interface of photonic crystal and metal film. The reflectance of the wide-gap photonic crystal can be suppressed by absorption in broadband spectral range.

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Доп.точки доступа:
Svyakhovskiy, S. E.; Bikbaev, R. G.; Myslivets, S. A.; Мысливец, Сергей Александрович; Evlashin, S. A.; Vyunishev, A. M.; Вьюнышев, Андрей Михайлович; Pankin, P. S.; Timofeev, I. V.; Тимофеев, Иван Владимирович; Vetrov, S. Ya.; Ветров, Степан Яковлевич; Arkhipkin, V. G.; Архипкин, Василий Григорьевич; International Conference on Laser Optics(2018 ; St. Petersburg)(June 4-8 2018)
}
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Bikbaev, R. G.
Epsilon-Near-Zero Absorber by Tamm Plasmon Polariton / R. G. Bikbaev, S. Y. Vetrov, I. V. Timofeev // Photonics. - 2019. - Vol. 6, Is. 1. - Ст. 28, DOI 10.3390/photonics6010028. - Cited References: 45. - This research was funded by RFBR according to the research project No. 18-32-00053. I.V.T. and S.Y.V. acknowledge financial support from RFBR and MOST according to the research project No. 19-52-52006. . - ISSN 2304-6732

РУБ Optics
Рубрики:
PERFECT ABSORPTION
   PHOTONIC CRYSTAL
   PROPAGATION
   LIGHT
Кл.слова (ненормированные):
photonic crystal -- nanocomposite -- epsilon near-zero material -- Tamm plasmon polariton
Аннотация: Two schemes of excitation of a Tamm plasmon polariton localized at the interface between a photonic crystal and a nanocomposite with near-zero effective permittivity have been investigated in the framework of the temporal coupled-mode theory. The parameters of the structure have been determined, which correspond to the critical coupling of the incident field with a Tamm plasmon polariton and, consequently, ensure the total absorption of the incident radiation by the structure. It has been established that the spectral width of the absorption line depends on the scheme of Tamm plasmon polariton excitation and the parameters of a nanocomposite film. The features of field localization at the Tamm plasmon polariton frequency for different excitation schemes have been examined. It has been demonstrated that such media can be used as narrowband absorbers based on Tamm plasmon polaritons localized at the interface between a photonic crystal and a nanocomposite with near-zero effective permittivity.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Vetrov, S. Ya.; Ветров, Степан Яковлевич; Timofeev, I. V.; Тимофеев, Иван Владимирович; Бикбаев, Рашид Гельмединович; RFBR; MOST [19-52-52006]
}
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    Broadband Tamm plasmon polariton / A. M. Vyunishev [et al.] // J. Opt. Soc. Am. B. - 2019. - Vol. 36, Is. 8. - P. 2299-2305, DOI 10.1364/JOSAB.36.002299. - Cited References: 50. - Russian Foundation for Basic Research (RFBR) (18-32-00053); Grant of the President of the Russian Federation (MK-2761.2019.2). . - ISSN 0740-3224. - ISSN 1520-8540
   Перевод заглавия: Широкополосный таммовский плазмон-поляритон

РУБ Optics
Рубрики:
PHOTONIC CRYSTAL
   OPTICAL-CONSTANTS
   PERFECT ABSORBER
   ABSORPTION
Аннотация: A broadband Tamm plasmon polariton localized at the interface between the Bragg mirror and a thin metallic layer has been theoretically and experimentally investigated. The possibility of a localized state formation has been demonstrated and energy coefficients at the Tamm plasmon polariton wavelength have been predicted in the framework of the coupled mode theory. The metallic layer material and thickness corresponding to the maximum coupling between the incident radiation and the Tamm plasmon polariton has been determined. Experimental reflectance and transmittance spectra of the structure consisting of the Bragg mirror and chromium layers of different thicknesses have been measured. The analysis of the energy spectra shows the existence of the wavelength range with the near-unity absorption coefficient inside the Bragg mirror bandgap. The use of chromium as a metal results in the broadband Tamm plasmon polariton excitation. It is demonstrated that the experimental data is in a good agreement with the calculation.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119991, Russia.
Skolkovo Inst Sci & Technol, Ctr Design Mfg & Mat, 3 Nobel St, Moscow 143026, Russia.

Доп.точки доступа:
Vyunishev, A. M.; Вьюнышев, Андрей Михайлович; Bikbaev, R. G.; Бикбаев, Рашид Гельмединович; Svyakhovskiy, Sergey E.; Timofeev, I. V.; Тимофеев, Иван Владимирович; Pankin, P. S.; Панкин, Павел Сергеевич; Evlashin, Stanislav A.; Vetrov, S. Ya.; Ветров, Степан Яковлевич; Myslivets, S. A.; Мысливец, Сергей Александрович; Arkhipkin, V. G.; Архипкин, Василий Григорьевич; Russian Foundation for Basic Research (RFBR) [18-32-00053]; Russian Federation [MK-2761.2019.2]
}
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Features of the pulsed magnetization switching in a high-coercivity material based on ε-Fe2O3 nanoparticles / S. I. Popkov, A. A. Krasikov, S. V. Semenov [et al.] // Phys. Solid State. - 2020. - Vol. 62, Is. 3. - P. 445-453, DOI 10.1134/S1063783420030166. - Cited References: 44. - The study was supported by the Russian Foundation for Basic Research, the Government of the Krasnoyarsk Krai, and the Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities, project no. 18-42-240012 "Magnetization Switching of Magnetic Nanoparticles in Strong Pulsed Magnetic Fields: New Approach to Studying the Dynamic Effects Related to the Magnetization of Magnetic Nanoparticles." . - ISSN 1063-7834. - ISSN 1090-6460

РУБ Physics, Condensed Matter
Рубрики:
HIGH-TEMPERATURE
   WAVE ABSORBER
   OXIDE
   FIELD
   TRANSITION
   RESONANCE
Кл.слова (ненормированные):
ε-Fe2O3 nanoparticles -- dynamic magnetization switching -- coercivity
Аннотация: The magnetic structure of the ε-Fe2O3 iron oxide polymorphic modification is collinear ferrimagnetic in the range from room temperature to ~150 K. As the temperature decreases, ε-Fe2O3 undergoes a magnetic transition accompanied by a significant decrease in the coercivity Hc and, in the low-temperature range, the compound has a complex incommensurate magnetic structure. We experimentally investigated the dynamic magnetization switching of the ε-Fe2O3 nanoparticles with an average size of 8 nm in the temperature range of 80–300 K, which covers different types of the magnetic structure of this iron oxide. A bulk material consisting of xerogel SiO2 with the ε-Fe2O3 nanoparticles embedded in its pores was examined. The magnetic hysteresis loops under dynamic magnetization switching were measured using pulsed magnetic fields Hmax of up to 130 kOe by discharging a capacitor bank through a solenoid. The coercivity Нс upon the dynamic magnetization switching noticeably exceeds the Нс value under the quasi-static conditions. This is caused by the superparamagnetic relaxation of magnetic moments of particles upon the pulsed magnetization switching. In the range from room temperature to ~ 150 K, the external field variation rate dH/dt is the main parameter that determines the behavior of the coercivity under the dynamic magnetization switching. It is the behavior that is expected for a system of single-domain ferro- and ferrimagnetic particles. Under external conditions (at a temperature of 80 K) when the ε-Fe2O3 magnetic structure is incommensurate, the coercivity during the pulsed magnetization switching depends already on the parameter dH/dt and is determined, to a great extent, by the maximum applied field Hmax. Such a behavior atypical of systems of ferrimagnetic particles is caused already by the dynamic spin processes inside the ε-Fe2O3 particles during fast magnetization switching.

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Публикация на русском языке Особенности импульсного перемагничивания высококоэрцитивного материала на основе наночастиц ε-Fe2O3 [Текст] / С. И. Попков, А. А. Красиков, С. В. Семенов [и др.] // Физ. тверд. тела. - 2020. - Т. 62 Вып. 3. - С. 395-402

Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Krasnoyarsk Sci Ctr, Siberian Branch, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Boreskov Inst Catalysis, Siberian Branch, Novosibirsk 630090, Russia.

Доп.точки доступа:
Popkov, S. I.; Попков, Сергей Иванович; Krasikov, A. A.; Красиков, Александр Александрович; Semenov, S. V.; Семёнов, Сергей Васильевич; Dubrovskii, A. A.; Дубровский, Андрей Александрович; Yakushkin, S. S.; Kirillov, V. L.; Mart'yanov, O. N.; Balaev, D. A.; Балаев, Дмитрий Александрович; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Government of the Krasnoyarsk Krai; Krasnoyarsk Territorial Foundation [18-42-240012]
}
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Bikbaev, R. G.
Hyperbolic metamaterial for the Tamm plasmon polariton application / R. G. Bikbaev, S. Y. Vetrov, I. V. Timofeev // J. Opt. Soc. Am. B. - 2020. - Vol. 37, Is. 8. - P. 2215-2220, DOI 10.1364/JOSAB.394935. - Cited References: 51. - Russian Foundation for Basic Research (18-32-00053, 19-42-240004, 19-52-52006) . - ISSN 0740-3224. - ISSN 1520-8540

РУБ Optics
Рубрики:
PHOTONIC CRYSTAL
   PERFECT ABSORBER
   STATES
   HETEROSTRUCTURES
Аннотация: The possibility of using a hyperbolic metamaterial to form conventional and epsilon-near-zero Tamm plasmon polaritons in the near-infrared and visible spectral ranges is demonstrated. The spectral properties of the hyperbolic metamaterial are investigated in the framework of the effective medium theory and confirmed by the transfer matrix method. It is found that at the oblique incidence of light onto a structure, the I-type hyperbolic metamaterial can be implemented, while II-type cannot. The sensitivity of the epsilon-near-zero wavelength to the variation in the angle of light incidence for TE and TM waves is demonstrated. It is shown that both the high-quality and broadband Tamm plasmon polaritons are excited in the investigated structures.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Vetrov, S. Ya.; Ветров, Степан Яковлевич; Timofeev, I. V.; Тимофеев, Иван Владимирович; Бикбаев, Рашид Гельмединович; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-32-00053, 19-42-240004, 19-52-52006]
}
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Germanium metasurfaces with lattice Kerker effect in near-infrared photodetectors / Z.-X. Zhou, M.-J. Ye, M.-W. Yu [et al.] // ACS Nano. - 2022. - Vol. 16. Is. 4. - P. 5994-6001, DOI 10.1021/acsnano.1c11326. - Cited References: 51. - We are grateful to Prof. Chun-Ting Lin and Prof. Chien-Chung Lin for helpful discussions. This work was supported by the Higher Education Sprout Project of the National Yang Ming Chiao Tung University and Ministry of Education and the Ministry of Science and Technology (MOST-111-2923-E-A49-001-MY3; 108-2923-E-009-003-MY3; 110-2224-E-009-002; 109-2628-E-009-007-MY3; 110-2221-E-A49-019-MY3). This research was also funded by the Russian Science Foundation (project no. 22-42-08003) . - ISSN 1936-0851
Кл.слова (ненормированные):
germanium (Ge) -- high refractive index (HRI) -- dielectric nanoantennas -- photodetector -- metasurfaces -- absorber
Аннотация: In O-and C-band optical communications, Ge is a promising material for detecting optical signals that are encoded into electrical signals. Herein, we study 2D periodic Ge metasurfaces that support optically induced electric dipole and magnetic dipole lattice resonances. By overlapping Mie resonances and electric dipole lattice resonances, we realize the resonant lattice Kerker effect and achieve narrowband absorption. This effect was applied to the photodetector demonstrated in this study. The absorptance of the Ge nanoantenna arrays increased 6-fold compared to that of the unpatterned Ge films. In addition, the photocurrent in such Ge metasurface photodetectors increases by approximately 5 times compared with that in plane Ge film photodetectors by the interaction of these strong near-fields with semiconductors and the further transformation of the optical energy into electricity.

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Держатели документа:
Institute of Photonic System, National Yang Ming Chiao Tung University, 301 Gaofa 3rd Road, Tainan, 711, Taiwan
College of Photonics, National Yang Ming Chiao Tung University, 301 Gaofa 3rd Road, Tainan, 711, Taiwan
Institute of Lighting and Energy Photonics, National Yang Ming Chiao Tung University, 301 Gaofa 3rd Road, Tainan, 711, Taiwan
Department of Electrical and Computer Engineering, University of New Mexico, Albuquerque, NM 87131, United States
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Institute of Engineering Physics and Radioelectronics, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Institute of Imaging and Biomedical Photonics, National Yang Ming Chiao Tung University, 301 Gaofa 3rd Road, Tainan, 711, Taiwan

Доп.точки доступа:
Zhou, Z. -X.; Ye, M. -J.; Yu, M. -W.; Yang, J. -H.; Su, K. -L.; Yang, C. -C.; Lin, C. -Y.; Babicheva, V. E.; Timofeev, I. V.; Тимофеев, Иван Владимирович; Chen, K. -P.
}
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10.

    Polarization-sensitive resonant absorber based on splitted tamm plasmon polariton / A. Y. Avdeeva, R. G. Bikbaev, S. Y. Vetrov [et al.] // Photonics Nanostruc. Fundam. Appl. - 2023. - Vol. 53, Is. 16. - Ст. 101094, DOI 10.1016/j.photonics.2022.101094. - Cited References: 55 . - ISSN 1569-4410. - ISSN 1569-4429
   Перевод заглавия: Поляризационно-чувствительный резонансный поглотитель на основе расщепления таммовского плазмон-поляритона
Кл.слова (ненормированные):
Absorber -- Polarization -- Localization of light -- Tamm plasmon polariton -- Anisotropic nanocomposite -- Plasmonic sensor
Аннотация: The possibility of creating a polarization-sensitive absorber on the basis of the splitting of a Tamm plasmon polariton at the interface between a metallic film and an anisotropic nanocomposite layer conjugated with a photonic crystal is theoretically predicted. The effect of geometrical parameters on the optical absorption spectra under the critical coupling conditions is discussed. It is shown that, changing the polarization of the radiation falling onto the structure along its normal, one can control the absorption at the Tamm plasmon polariton wavelength.

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Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Avdeeva, A. Yu.; Авдеева, Анастасия Юрьевна; Bikbaev, R. G.; Бикбаев, Рашид Гельмединович; Vetrov, S. Ya.; Ветров, Степан Яковлевич; Doyko, R. K.; Timofeev, I. V.; Тимофеев, Иван Владимирович
}
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