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3D optical vortex lattices / D. A. Ikonnikov, S. A. Myslivets, V. G. Arkhipkin, A. M. Vyunishev // Ann. Phys.-Berlin. - 2021. - Vol. 533, Is. 7. - Ст. 2100114, DOI 10.1002/andp.202100114. - Cited References: 29. - This work was supported by the Russian Science Foundation (Grant No. 19-12-00203).The surface grating was fabricated and characterized at the Center for Collective Use of the Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences. The authors thank M. N. Volochaev and A. I. Zaitsev for help . - ISSN 0003-3804. - ISSN 1521-3889

РУБ Physics, Multidisciplinary
Рубрики:
MANIPULATION
   PARTICLES
   ARRAY
   BEAMS
   GENERATION
   TRANSPORT
   VORTICES
Кл.слова (ненормированные):
optical lattices -- optical vortices -- Talbot effect
Аннотация: Fresnel diffraction of light beams with a topological charge on a 2D regular amplitude transparency mask is studied. Numerical predictions show that the 3D optical lattices of optical vortices can be formed using the Talbot effect, with these predictions confirmed by the experimental reconstruction of all 3D optical vortex lattices. The periodicity of the 3D optical vortex lattices is determined by the light wavelength and periodicity of a transparency mask. Furthermore, it is shown that the optical vortices are created and annihilated during light propagation behind the mask with the preservation of the total topological charge. The 3D optical vortex lattices are considered to be tolerant to the perturbations induced by trapped particles caused by the features of the Talbot effect. The 3D optical vortex lattices open new possibilities for light-matter interactions and the related applications.

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

Доп.точки доступа:
Ikonnikov, D. A.; Иконников, Денис Андреевич; Myslivets, S. A.; Мысливец, Сергей Александрович; Arkhipkin, V. G.; Архипкин, Василий Григорьевич; Vyunishev, A. M.; Вьюнышев, Андрей Михайлович; Russian Science FoundationRussian Science Foundation (RSF) [19-12-00203]
}
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Aver'yanov, E. M.
Fluctuations of orientational order in a uniaxial nematic liquid crystal with biaxial molecules and its response to an external field / E. M. Aver'yanov // Phys. Solid State. - 2003. - Vol. 45, Is. 5. - P. 990-1001, DOI 10.1134/1.1575350. - Cited References: 30 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
PHASE-TRANSITION
   SMECTIC-A
   PARTICLES
   SYSTEM
   LANDAU
   MODEL
Аннотация: Homogeneous thermal fluctuations of the orientational order parameters S and G of biaxial molecules in a uniaxial nematic liquid crystal are investigated in the framework of the molecular-statistical theory. It is demonstrated that the molecular biaxiality significantly affects the order parameters S and G, their temperature dependences in the nematic phase, the amplitude and the temperature dependence of the order parameter fluctuations in the nematic and isotropic phases, and the character of the transition from the nematic phase to the isotropic liquid phase. It is established that the fluctuations of the parameters S and G in the nematic phase are related to the temperature dependences of S and G and the susceptibilities chi(S) and chi(G) of the nematic liquid crystal to external fields, which leads to a change in the parameters S and G at a fixed director orientation. Explanations are offered for the known experimental data on the orientational ordering of biaxial molecules under the action of external fields in the isotropic phase of nematic liquid crystals. (C) 2003 MAIK "Nauka/Interperiodica".

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Аверьянов, Евгений Михайлович
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Bulgakov, E. N.
Light guiding above the light line in arrays of dielectric nanospheres / E. N. Bulgakov, D. N. Maksimov // Opt. Lett. - 2016. - Vol. 41, Is. 16. - P. 3888-3891, DOI 10.1364/OL.41.003888. - Cited References: 46. - Russian Foundation for Basic Research (RFBR) (16-02-00314). . - ISSN 0146-9592

РУБ Optics
Рубрики:
SUBWAVELENGTH WAVE-GUIDES
   OPTICAL MODES
   NANOPARTICLES
   CHAINS
   RESONANCES
   PARTICLES
   SPHERES
Аннотация: We consider light propagation above the light line in arrays of spherical dielectric nanoparticles. It is demonstrated numerically that quasi-bound leaky modes of the array can propagate both stationary waves and light pulses to a distance of 60 wavelengths at the frequencies close to the bound states in the radiation continuum. A semi-analytical estimate for decay rates of the guided waves is found to match the numerical data to a good accuracy. © 2016 Optical Society of America.

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Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk, Russian Federation
Siberian State Aerospace University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Maksimov, D. N.; Максимов, Дмитрий Николаевич; Булгаков, Евгений Николаевич
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Dispersion of Faraday rotation in Co/SiO2 multilayer films / I. S. Edelman [et al.] // JETP Letters. - 1996. - Vol. 63, Is. 4. - P. 273-277, DOI 10.1134/1.567015. - Cited References: 9 . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
PARTICLES
Аннотация: The Faraday rotation spectra of Co/SiO2 multilayer films were found to be substantially different from the well-known spectra of homogeneous Co films. The character of these changes was studied as a function of the thicknesses of the ferromagnetic metal and the nonmagnetic dielectric layers. (C) 1996 American Institute of Physics.

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Держатели документа:
L. V. Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, 660036 Krasnoyarsk, Russian Federation
ИФ СО РАН

Доп.точки доступа:
Edelman, I. S.; Эдельман, Ирина Самсоновна; Morozova, T. P.; Zabluda, V. M.; Kim, T. A.; Turpanov, I. A.; Турпанов, Игорь Александрович; Betenkova, A. Ya.; Бетенькова, Анна Яковлевна; Dynnik, Y. A.
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    Dynamics of self-organized aggregation of resonant nanoparticles in a laser field / V. V. Slabko [et al.] // Appl. Phys. B. - 2014. - Vol. 117, Is. 1. - P. 271-278, DOI 10.1007/s00340-014-5831-0. - Cited References: 30. - This research is partially supported by Grant of the Ministry of Education and Science of the Russian Federation for Siberian Federal University, by SB RAS Grant 24.31, and by RFBR Research Project No. 14-02-00219 A. . - ISSN 0946-2171. - ISSN 1432-0649
   Перевод заглавия: Динамика самоорганизованной агрегации резонансных наночастиц в лазерном поле
Рубрики:
PHOTOSTIMULATED AGGREGATION
   SILVER
   PRINCIPLES
   PARTICLES
   SPECTRA
   SOLS
Аннотация: Self-organized aggregation of nanoparticles in external resonant laser field is considered using Brownian dynamics model. Formation probabilities are calculated for the pair of particles in dependence on laser wavelength and mutual orientation of particles. Times required for aggregation are calculated. Possibility of efficient aggregation using pulsed laser is deduced.

Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia
L.V. Kirenskii Inst Phys, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Slabko, V. V.; Слабко, Виталий Васильевич; Tsipotan, A. S. ; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Slyusareva, E. A.; Grant of the Ministry of Education and Science of the Russian Federation for Siberian Federal University; SB RAS Grant [24.31]; RFBR [14-02-00219 A]
}
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Effects of size polydispersity on the extinction spectra of colloidal nanoparticle aggregates / A. E. Ershov [et al.] // Phys. Rev. B. - 2012. - Vol. 85, Is. 4. - Ст. 045421. - P. , DOI 10.1103/PhysRevB.85.045421. - Cited References: 41. - This work was supported by grants from the following foundations of the Russian Federation: Presidium of RAS, OFN RAS, and SB RAS. . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
METAL FRACTAL CLUSTERS
   OPTICAL-PROPERTIES
   ABSORPTION
   NONLINEARITIES
   COMPOSITES
   SCATTERING
   PARTICLES
   SPHERES
   GRAINS
Аннотация: We investigate the effect of particle polydispersity on the optical extinction spectra of colloidal aggregates of spherical metallic (silver) nanoparticles, taking into account the realistic interparticle gaps caused by layers of stabilizing polymer adsorbed on the metal surface (adlayers). The spectra of computer-generated aggregates are computed using two different methods. The coupled-multipole method is used in the quasistatic approximation and the coupled-dipole method beyond the quasistatics. The latter approach is applicable if the interparticle gaps are sufficiently wide relative to the particle radii. Simulations are performed for two different particle size distribution functions (bimodal and Gaussian), varying the number of particles per aggregate, and different distribution functions of the interparticle gap width. The strong influence of the latter factor on the spectra is demonstrated and investigated in detail.

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Держатели документа:
[Ershov, Alexander E.
Isaev, Ivan L.
Semina, Polina N.
Karpov, Sergei V.] Russian Acad Sci, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Ershov, Alexander E.
Karpov, Sergei V.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Markel, Vadim A.] Univ Penn, Dept Bioengn, Dept Radiol, Philadelphia, PA 19104 USA
[Markel, Vadim A.] Univ Penn, Grad Grp Appl Math & Computat Sci, Philadelphia, PA 19104 USA

Доп.точки доступа:
Ershov, A. E.; Ершов, Александр Евгеньевич; Isaev, I. L.; Исаев, Иван Леонидович; Semina, P. N.; Семина, Полина Николаевна; Markel, V. A.; Karpov, S. V.; Карпов, Сергей Васильевич
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EPR study of the Jahn-Teller effect of Cu2+ ions in ZnGa2O4 / A. M. Vorotynov [et al.] // Phys. Solid State. - 2010. - Vol. 52, Is. 11. - P. 2415-2418, DOI 10.1134/S1063783410110314. - Cited References: 12 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
MAGNETIC-PROPERTIES
PARTICLES
CUFE2O4
Аннотация: The Jahn-Teller effect in the ZnGa2O4 spinel single crystal has been investigated using electron paramagnetic resonance of Cu2+ ions in the temperature range 110-560 K. It has been shown that copper ions occupy octahedral sites 16d in the ZnGa2O4 crystal with cubic symmetry O (h) (7) (Fd-3m). At T 560 K, the octahedra undergo tetragonal distortions (predominantly tension) and rotation around the fourfold axes by the angle theta a parts per thousand 2.6A degrees. The parameters of the spin Hamiltonian, which characterize the prolate (g (aEuro-)

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Держатели документа:
[Vorotynov, A. M.
Petrakovskii, G. A.
Sablina, K. A.
Bovina, A. F.
Vasil'ev, A. D.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Vorotynov, A. M.; Воротынов, Александр Михайлович; Petrakovskii, G. A.; Петраковский, Герман Антонович; Sablina, K. A.; Саблина, Клара Александровна; Bovina, A. F.; Бовина, Ася Федоровна; Vasil'ev, A. D.; Васильев, Александр Дмитриевич
}
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Identification of ε-Fe2O3 nano-phase in borate glasses doped with Fe and Gd / O. S. Ivanova [et al.] // J. Magn. Magn. Mater. - 2016. - Vol. 401. - P. 880-889, DOI 10.1016/j.jmmm.2015.10.126. - Cited References: 40. - This work was supported partly by the Russian Foundation for Basic Research, Grants No 14-02-01211-a and by the President of Russia Grant No. NSh-2886.2014.2. Authors are grateful to G.A. Bukhtiyarova and U.N. Martyanov for the assistance in the ε-Fe2O3 nanoparticles prepared by a wet chemical pore filling impregnation method and for the discussion of the obtained results . - ISSN 0304-8853

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
MAGNETIC-PROPERTIES
   IRON-OXIDE
   NANOPARTICLES
   CERAMICS
   CRYSTAL
   PARTICLES
   SURFACE
Кл.слова (ненормированные):
Magnetic nanoparticles -- ε-Fe2O3 -- Magnetic circular dichroism -- Electron magnetic resonance
Аннотация: A new type of magnetic nanoparticles was revealed in borate glasses co-doped with low contents of iron and gadolinium. Structure and magnetic properties of the particles differ essentially from that of the α-Fe2O3, γ-Fe2O3, or Fe3O4 nanoparticles which were detected earlier in similar glass matrices. Transmission electron microscopy including STEM-HAADF and EDX, synchrotron radiation-based XRD, static magnetic measurements, magnetic circular dichroism, and electron magnetic resonance studies allow referring the nanoparticles to the iron oxide phase-ε-Fe2O3. Analysis of the data set has shown that it is Gd atoms that govern the process of nanoparticles' nucleation and its incorporation into the particles in different proportions can be used to adjust their magnetic and magneto-optical characteristics. © 2015 Elsevier B.V.

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Держатели документа:
L.V. Kirensky Institute of Physics, Siberian Branch of RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
NRC Kurchatov Institute, Moscow, Russian Federation
Boreskov Institute of Catalysis, Siberian Branch of RAS, Novosibirsk, Russian Federation
Novosibirsk State University, Novosibirsk, Russian Federation
Vavilov State Optical Institute, All-Russia Research Center, Petersburg, Russian Federation

Доп.точки доступа:
Ivanova, O. S.; Иванова, Оксана Станиславовна; Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Edelman, I. S.; Эдельман, Ирина Самсоновна; Petrakovskaja, E. A.; Петраковская, Элеонора Анатольевна; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Zubavichus, Y. V.; Zaikovskii, V .I.; Stepanov, S. A.
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Karpov, S. V.
The role of the electron tunneling effect in the coagulation kinetics of polydisperse metal nanocolloids / S. V. Karpov, P. N. Semina, A. P. Gavrilyuk // Colloid J. - 2012. - Vol. 74, Is. 3. - P. 305-312, DOI 10.1134/S1061933X12030052. - Cited References: 16. - Authors are thankful to G. A. Chiganova for discussions and helpful comments. Studies were carried out with the support of grants: the Presidium of RAS No 29 and No 31, OFN RAS III.9.5, IP SB RAS No 43, IP SB RAS (and SFU) No 101. . - ISSN 1061-933X

РУБ Chemistry, Physical
Рубрики:
PARTICLES
Аннотация: The energy of pair interactions between metal nanoparticles of different sizes is shown to be able to increase upon coagulation due to the additional electrostatic effect resulting from mutual heteropolar charging of the particles. The tunnel electron transfer occurring upon the collisions between particles of different sizes may be the reason for the charging. The transfer is caused by the dependence of the electron work function on the particle size. The electron transfer through the interparticle gap equalizes the Fermi levels in particles of different sizes and is associated with this dependence. Using the example of bimodal silver nanocolloids, it is shown that mutual heteropolar charging of particles with different sizes may accelerate the coagulation of polydisperse colloidal systems by an order of magnitude or more as compared with monodisperse systems, in which this effect is absent.

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Публикация на русском языке Карпов, Сергей Васильевич. Роль электронного туннельного эффекта в кинетике коагуляции полидисперсных наноколлоидов металлов [Текст] / С. В. Карпов, П. Н. Сёмина, А. П. Гаврилюк // Коллоид. журн. - М. : Наука, 2012. - Т. 74 № 3. - С. 329-336

Держатели документа:
[Karpov, S. V.
Semina, P. N.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Karpov, S. V.] Siberian Fed Univ, Krasnoyarsk 660028, Russia
[Gavrilyuk, A. P.] Russian Acad Sci, Siberian Branch, Inst Computat Modeling, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Semina, P. N.; Семина, Полина Николаевна; Gavrilyuk, A. P.; Карпов, Сергей Васильевич
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10.

Light transmission of polymer-dispersed liquid crystal layer composed of droplets with inhomogeneous surface anchoring / V. A. Loiko [et al.] // Opt. Spectrosc. - 2016. - Vol. 120, Is. 1. - P. 143-152, DOI 10.1134/S0030400X16010112. - Cited References:43. - This work was supported by the National Academy of Sciences of Belarus and the Siberian Branch of the Russian Academy of Sciences (project no. 36) and the Belarusian Republican Foundation for Fundamental Research (project no. F15SO-039). . - ISSN 0030-400X. - ISSN 1562-6911

РУБ Optics + Spectroscopy
Рубрики:
NEMATIC DROPLETS
   IONIC MODIFICATION
   FIELD
   TRANSITIONS
   SCATTERING
   PARTICLES
   INTERFACE
   DISPLAYS
Аннотация: We have developed a model and realized an algorithm for the calculation of the coefficient of coherent (direct) transmission of light through a layer of liquid crystal (LC) droplets in a polymer matrix. The model is based on the Hulst anomalous diffraction approximation for describing the scattering by an individual particle and the Foldy-Twersky approximation for a coherent field. It allows one to investigate polymer dispersed LC (PDLC) materials with homogeneous and inhomogeneous interphase surface anchoring on the droplet surface. In order to calculate the configuration of the field of the local director in the droplet, the relaxation method of solving the problem of minimization of the free energy volume density has been used. We have verified the model by comparison with experiment under the inverse regime of the ionic modification of the LC-polymer interphase boundary. The model makes it possible to solve problems of optimization of the optical response of PDLC films in relation to their thickness and optical characteristics of the polymer matrix, sizes, polydispersity, concentration, and anisometry parameters of droplets. Based on this model, we have proposed a technique for estimating the size of LC droplets from the data on the dependence of the transmission coefficient on the applied voltage.

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Публикация на русском языке Пропускание света слоем капсулированного полимером жидкого кристалла при неоднородном сцеплении на поверхности капель [Текст] / В. А. Лойко [и др.] // Оптика и спектроскопия : Наука, 2016. - Т. 120 № 1. - С. 158-168

Держатели документа:
Natl Acad Sci Belarus, Stepanov Inst Phys, Minsk 220072, Byelarus.
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Loiko, V. A.; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Konkolovich, A. V.; Miskevich, A. A.
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