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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gavriliuk A. P., Isaev I. L., Karpov S. V., Krasnov I. V., Shaparev N. Y.
Заглавие : Brownian dynamic of laser cooling and crystallization of electron-ion plasma
Место публикации : Phys. Rev. E. - 2009. - Vol. 80, Is. 5. - Ст.56404. - ISSN 1539-3755, DOI 10.1103/PhysRevE.80.056404
Примечания : Cited References: 29
Предметные рубрики: ULTRACOLD NEUTRAL PLASMAS
OPTICAL MOLASSES
LIQUIDS
ATOMS
TRAP
Ключевые слова (''Своб.индексиров.''): brownian motion--laser cooling--plasma collision processes--plasma light propagation--plasma nonlinear processes--plasma simulation--plasma transport processes--brownian dynamics--brownian dynamics simulations--electron ion plasma--electron subsystem--friction force--ionic structure--nonlinear dependence--plasma cooling--brownian movement--crystallization--ions--laser cooling--lasers--cooling
Аннотация: Laser cooling and crystallization of electron-ion plasma is studied using the Brownian dynamics simulation technique and taking into consideration the interaction of ions with the electron subsystem. It has been shown that the nonlinear dependence of laser friction force on the velocity of ions has to be taken into account in order to simulate in an adequate manner the cooling dynamics and obtain a correct estimate for minimum temperatures. It has been found that times required for formation of an ordered ionic structure can be much longer than the typical plasma cooling time.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Gavrilyuk A. P., Isaev I. l., Karpov S. V., Krasnov I. V., Shaparev N. Ya.
Заглавие : Brownian dynamics of laser cooling of rarefied electron-ion plasma
Коллективы : Russian-Chinese symposium on laser physics and laser technologies
Место публикации : The 9-th Russian-Chinese symposium on laser physics and laser technologies: the Conference on lasers and laser technologies for students and young investigators (to the memory of professor N. A. Prilezhaeva, founder of Tomsk school of spectroscopic thought and laser physics) : 26-31 October, 2008, Tomsk, Russia : [proceedings]. - 2008. - p.2. - ISBN 5-94621-255-9
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Ershov A. E., Bikbaev R. G., Rasskazov I. L., Gerasimov V. S., Timofeev I. V., Polyutov S. P., Karpov S. V.
Заглавие : Collective resonances in hybrid photonic-plasmonic nanostructures
Коллективы : International Conference on Metamaterials and Nanophotonics, Санкт-Петербургский национальный исследовательский университет информационных технологий, механики и оптики
Место публикации : International Conference on Metamaterials and Nanophotonics (METANANO 2019). - St. Petersburg, 2019
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Utyushev A. D., Zakomirnyi V. I., Ershov A. E., Gerasimov V. S., Karpov S. V., Rasskazov I. L.
Заглавие : Collective lattice resonances in all-dielectric nanostructures under oblique incidence
Место публикации : Photonics. - 2020. - Vol. 7, Is. 2. - Ст.24. - ISSN 23046732 (ISSN), DOI 10.3390/PHOTONICS7020024
Примечания : Cited References: 70. - This research was funded by the RF Ministry of Science and Higher Education, the State contract with Siberian Federal University for scientific research and Russian Science Foundation project 19-72-00066 (investigation of finite size effects)
Аннотация: Collective lattice resonances (CLRs) emerging under oblique incidence in 2D finite-size arrays of Si nanospheres have been studied with the coupled dipole model. We show that hybridization between the Mie resonances localized on a single nanoparticle and angle-dependent grating Wood-Rayleigh anomalies allows for the efficient tuning of CLRs across the visible spectrum. Complex nature of CLRs in arrays of dielectric particles with both electric dipole (ED) and magnetic dipole (MD) resonances paves a way for a selective and flexible tuning of either ED or MD CLR by an appropriate variation of the angle of incidence. The importance of the finite-size effects, which are especially pronounced for CLRs emerging for high diffraction orders under an oblique incidence has been also discussed.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zakomirnyi V. I., Ershov A. E., Gerasimov V. S., Karpov S. V., Ågren H., Rasskazov I. L.
Заглавие : Collective lattice resonances in arrays of dielectric nanoparticles: a matter of size
Место публикации : Opt. Lett. - 2019. - Vol. 44, Is. 23. - P.5743-5746. - ISSN 0146-9592, DOI 10.1364/OL.44.005743. - ISSN 1539-4794 (eISSN)
Примечания : Cited References: 66. - Russian Science Foundation (19-72-00066).
Аннотация: Collective lattice resonances (CLRs) in finite-sized 2D arrays of dielectric nanospheres have been studied via the coupled dipole approximation. We show that even for sufficiently large arrays, up to 100×100 nanoparticles (NPs), electric or magnetic dipole CLRs may differ significantly from the ones calculated for infinite arrays with the same NP sizes and interparticle distances. The discrepancy is explained by the existence of a sufficiently strong cross-interaction between electric and magnetic dipoles induced at NPs in finite-sized lattices, which is ignored for infinite arrays. We support this claim numerically and propose an analytic model to estimate a spectral width of CLRs for finite-sized arrays. Given that most of the current theoretical and numerical researches on collective effects in arrays of dielectric NPs rely on modeling infinite structures, the reported findings may contribute to thoughtful and optimal design of inherently finite-sized photonic devices.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zakomirnyi, Vadim, I, Karpov S. V., Agren, Hans, Rasskazov, Ilia L.
Заглавие : Collective lattice resonances in disordered and quasi-random all-dielectric metasurfaces
Коллективы : Russian Foundation for Basic Research (RFBR) [18-42-240013]; Russian Science Foundation (RSF) [18-13-00363]; Siberian Federal University (SibFU) [3.8896.2017]
Место публикации : J. Opt. Soc. Am. B. - 2019. - Vol. 36, Is. 7. - P.E21-E29. - ISSN 0740-3224, DOI 10.1364/JOSAB.36.000E21. - ISSN 1520-8540(eISSN)
Примечания : Cited References: 91. - Russian Foundation for Basic Research (RFBR) (18-42-240013); Russian Science Foundation (RSF) (18-13-00363); Siberian Federal University (SibFU) (3.8896.2017).
Предметные рубрики: PLASMON RESONANCES
NANOPARTICLE ARRAY
MODES
GOLD
NANOPHOTONICS
Аннотация: Collective lattice resonances in disordered 2D arrays of spherical Si nanoparticles (NPs) have been thoroughly studied within the framework of the coupled dipole approximation. Three types of defects have been analyzed: positional disorder, size disorder, and quasi-random disorder. We show that the positional disorder strongly suppresses either the electric dipole (ED) or the magnetic dipole (MD) coupling, depending on the axis along which the NPs are shifted. Contrarily, size disorder strongly affects only the MD response, while the ED resonance can be almost intact, depending on the lattice configuration. Finally, random removing of NPs from an ordered 2D lattice reveals a quite surprising result: hybridization of the ED and MD resonances with lattice modes remains observable even in the case of random removing of up to 84% of the NPs from the ordered array. The reported results could be important for rational design and utilization of metasurfaces, solar cells, and other alldielectric photonic devices. (C) 2019 Optical Society of America
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Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Ershov A. E., Bikbaev R. G., Rasskazov I. L., Gerasimov V. S., Timofeev I. V., Polyutov S. P., Karpov S. V.
Заглавие : Collective resonances in hybrid photonic-plasmonic nanostructures
Коллективы : International Conference on Metamaterials and Nanophotonics
Место публикации : J. Phys.: Conf. Ser. - 2020. - Vol. 1461, Is. 1. - Ст.012046. - DOI 10.1088/1742-6596/1461/1/012046
Примечания : Cited References: 11. - The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science (Grant No. 18-42-240013); A.E. thanks the grant of the President of Russian Federation (agreement 075-15-2019-676)
Аннотация: We present the theoretical model to predict the spectral position of Rayleigh anomalies emerged in hybrid system consisting of periodic array of plasmonic nanodisks embeded into the middle of defect layer of 1D photonic crystal (PhC). The spectral positions of these new emerged Rayleigh anomalies agree well with the results of exact simulations with Finite-Difference Time-Domain (FDTD) method.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Rasskazov I. L., Karpov S. V., Panasyuk G. Y., Markel V. A.
Заглавие : Controllable propagation of surface plasmon polaritons in chains of non-spherical nanoparticles on dielectric substrate
Коллективы : Electromagnetic and Light Scattering Conference
Место публикации : Electromagnetic & Light Scattering XV : abstracts. - Leipzig, 2015. - Ст.88
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Карпов, Сергей Васильевич, Исаев, Иван Леонидович, Герасимов, Валерий Сергеевич, Грачев, Александр Сергеевич, Рассказов И. С, Ципотан, Алексей Сергеевич
Заглавие : Cинтез плазмонно-резонансных нановолноводов оптического излучения на диэлектрической подложке в условиях ее электростатической функционализации
Коллективы : "Ультрадисперсные порошки, наноструктуры, материалы", Всероссийская научно-техническая конференция, Ставеровские чтения
Место публикации : Ультрадисперсные порошки, наноструктуры, материалы: получение, свойства, применение. V Ставеровские чтения: труды Всерос. науч.-технич. конф. с междунар. участием, 15-16 октября 2009 г., Красноярск. - Красноярск: СФУ, 2009. - С. 210-211
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10.

Вид документа : Статья из сборника (том многотомника)
Шифр издания :
Автор(ы) : Орешонков, Александр Сергеевич, Попов, Захар Иванович
Заглавие : DFT-моделирование спектров КРС монослоёв XMoY (X=S, Se; Y=Se, Te, O)
Коллективы : Сибирский федеральный университет, Российская академия наук, Сибирское отделение РАН, Федеральный исследовательский центр "Красноярский научный центр Сибирского отделения Российской академии наук", Институт физики им. Л.В. Киренского Сибирского отделения РАН, Всероссийская научная конференция с международным участием "Енисейская фотоника-2022", "Енисейская фотоника", Всероссийская научная конференция с международным участием
Место публикации : Енисейская фотоника-2022: тезисы докладов : в 2-х т./ Сиб. федер. ун-т [и др.]. - Красноярск, 2022. - Т. 1, Секция 1: Новые оптические материалы. - С. 89. - ISBN 978-5-6045250-1-2
Примечания : Библиогр.: 2
Аннотация: В работе выполнено численное моделирование спектров комбинационного рассеяния света монослоёв XMoY (X=S, Se; Y=Se, Te, O). Валидность используемого подхода подтверждена путём сравнения полученных спектров с имеющимися экспериментальными данными. Проанализированы как графеноподобные 1H и 1T фазы, так и монослои со структурами 1Tʹ, 1Hʹ, 1Aʹ и 1S.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gavrilyuk A.P., Karpov S.V.
Заглавие : Dynamic Changes of Optical Characteristics of Resonant Domains in Metal Nanoparticle Aggregates under Pulsed Laser Fields
Место публикации : Applied Physics B: Lasers and Optics. - 2010. - Vol. 101. - С. 512
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ershov A. E., Gavrilyuk A. P., Karpov S. V., Semina P. N.
Заглавие : Effect of local environment in resonant domains of polydisperse plasmonic nanoparticle aggregates on optodynamic processes in pulsed laser fields
Коллективы : Russian Academy of Sciences [24.29, 24.31, III.9.5, 43, SB RAS-SFU (101), 3-9-5]
Место публикации : Chin. Phys. B: IOP Publishing, 2015. - Vol. 24, Is. 4. - Ст.047804. - ISSN 1674, DOI 10.1088/1674-1056/24/4/047804. - ISSN 17414199(eISSN)
Примечания : Cited References:25. - Project supported by the Russian Academy of Sciences (Grant Nos. 24.29, 24.31, III.9.5, 43, SB RAS-SFU (101), and 3-9-5).
Предметные рубрики: METAL NANOPARTICLES
GOLD NANOPARTICLES
OPTICAL-PROPERTIES
Ключевые слова (''Своб.индексиров.''): nanoparticle--surface plasmon--colloid aggregate--optodynamics
Аннотация: Interactions of pulsed laser radiation with resonance domains of multiparticle colloidal aggregates having an increasingly complex local environment are studied via an optodynamic model. The model is applied to the simplest configurations, such as single particles, dimers, and trimers consisting of mono- and polydisperse Ag nanoparticles. We analyze how the local environment and the associated local field enhancement by surrounding particles affect the optodynamic processes in domains, including their photomodification and optical properties.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Khrennikov D. E., Titov A. K., Ershov A. E., Klyuchantsev A. B., Pariev V. I., Karpov S. V.
Заглавие : Effect of the surface shape of a large space body on its fragmentation in a planetary atmosphere
Место публикации : Mon. Not. Roy. Astron. Soc. - 2020. - Vol. 493, Is. 1. - P.1352-1360. - ISSN 0035-8711, DOI 10.1093/mnras/staa330. - ISSN 1365-2966(eISSN)
Примечания : Cited References: 38
Предметные рубрики: LARGE METEOROIDS
Аннотация: Employing the finite element and computational fluid dynamics methods, we have determined the conditions for the fragmentation of space bodies or preservation of their integrity when they penetrate into the Earth's atmosphere. The origin of forces contributing to the fragmentation of space iron bodies during the passage through the dense layers of the planetary atmosphere has been studied. It was shown that the irregular shape of the surface can produce transverse aerodynamic forces capable of causing deformation stress in the body exceeding the tensile strength threshold of iron.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ershov A. E., Isaev I. L., Semina P. N., Markel V. A., Karpov S. V.
Заглавие : Effects of size polydispersity on the extinction spectra of colloidal nanoparticle aggregates
Место публикации : Phys. Rev. B: American Physical Society, 2012. - Vol. 85, Is. 4. - Ст.045421. - P. - ISSN 1098-0121, DOI 10.1103/PhysRevB.85.045421
Примечания : 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.
Предметные 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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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Markel V. A., Pustovit V. N., Karpov S. V., Obuschenko A. V., Gerasimov V. S., Isaev I. L.
Заглавие : Electromagnetic density of states and absorption of radiation by aggregates of nanospheres with multipole interactions
Место публикации : Phys. Rev. B: AMER PHYSICAL SOC, 2004. - Vol. 70, Is. 5. - Ст.54202. - ISSN 1098-0121, DOI 10.1103/PhysRevB.70.054202
Примечания : Cited References: 81
Предметные рубрики: DISCRETE-DIPOLE APPROXIMATION
ENHANCED RAMAN-SCATTERING
METAL FRACTAL CLUSTERS
OPTICAL-PROPERTIES
SELECTIVE PHOTOMODIFICATION
DISORDERED CLUSTERS
NUMERICAL-SIMULATION
SPECTRAL DEPENDENCE
PARTICULATE MATTER
LIGHT-SCATTERING
Ключевые слова (''Своб.индексиров.''): carbon--iron--palladium--silver--article--dipole--electromagnetic field--geometry--mathematical analysis--molecular interaction--nanoparticle--radiation absorption
Аннотация: We calculate the quasistatic electromagnetic density of states for aggregates of touching spheres, in particular, linear chains and computer-generated random fractal aggregates. Multipole moments with orders of up to L=64 are taken into account for random aggregates with the number of particles of up to N=100 and up to L=8000 for linear chains. Extensive comparisons with the dipole approximation and geometrical cluster renormalization method are performed. Extinction spectra are calculated for several metals and black carbon. Long wavelength electromagnetic properties of fractal aggregates are considered in details.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gerasimov V. S., Ershov A. E., Bikbaev R. G., Rasskazov I. L., Timofeev I. V., Polyutov S. P., Karpov S. V.
Заглавие : Engineering mode hybridization in regular arrays of plasmonic nanoparticles embedded in 1D photonic crystal
Место публикации : J. Quant. Spectrosc. Radiat. Transf. - 2019. - Vol. 224. - P.303-308. - ISSN 00224073 (ISSN), DOI 10.1016/j.jqsrt.2018.11.028
Примечания : Cited References: 49. - The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science (Grant No.18-42-240013); by the RF Ministry of Science and Higher Education, the State contract with Siberian Federal University for scientific research in 2017–2019 (Grant No.3.8896.2017); by the Russian Science Foundation (Project No. 18-13-00363 ) (numerical calculations of Rayleigh anomalies in planar structures and corresponding research).
Аннотация: We analytically and numerically study coupling mechanisms between 1D photonic crystal (PhC) and 2D array of plasmonic nanoparticles (NPs) embedded in its defect layer. We introduce general formalism to explain and predict the emergence of PhC-mediated Wood–Rayleigh anomalies, which spectral positions agree well with the results of exact simulations with Finite-Difference Time-Domain (FDTD) method. Electromagnetic coupling between localized surface plasmon resonance (LSPR) and PhC-mediated Wood–Rayleigh anomalies makes it possible to efficiently tailor PhC modes. The understanding of coupling mechanisms in such hybrid system paves a way for optimal design of sensors, light absorbers, modulators and other types of modern photonic devices with controllable optical properties.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Utyushev A. D., Isaev I. L., Gerasimov V. S., Ershov A. E., Zakomirnyi V. I., Rasskazov I. L., Polyutov S. P., Ågren H., Karpov S. V.
Заглавие : Engineering novel tunable optical high-Q nanoparticle array filters for a wide range of wavelengths
Место публикации : Opt. Express. - 2020. - Vol. 28, Is. 2. - P.1426-1438. - ISSN 1094-4087, DOI 10.1364/OE.28.001426
Примечания : Cited References: 62. - The reported study was funded by the Russian Science Foundation, project No. 18-13-00363; the grant of the President of Russian Federation for young scientists No. 075-15-2019-676 (calculations of the electromagnetic field configurations in NPs array)
Предметные рубрики: Nanophotonics, Metamaterials, and Photonic Crystals
Аннотация: The interaction of non-monochromatic radiation with arrays comprising plasmonic and dielectric nanoparticles has been studied using the finite-difference time-domain electrodynamics method. It is shown that LiNbO3, TiO2, GaAs, Si, and Ge all-dielectric nanoparticle arrays can provide a complete selective reflection of an incident plane wave within a narrow spectral line of collective lattice resonance with a Q-factor of 103 or larger at various spectral ranges, while plasmonic refractory TiN and chemically stable Au nanoparticle arrays provide high-Q resonances with moderate reflectivity. Arrays with fixed dimensional parameters make it possible to fine-tune the position of a selected resonant spectral line by tilting the array relative to the direction of the incident radiation. These effects provide grounds for engineering novel selective tunable optical high-Q filters in a wide range of wavelengths, from visible to middle-IR.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Karpov S. V., Gerasimov V. S., Isaev I. L., Markel V. A.
Заглавие : Local anisotropy and giant enhancement of local electromagnetic fields in fractal aggregates of metal nanoparticles
Место публикации : Phys. Rev. B: AMER PHYSICAL SOC, 2005. - Vol. 72, Is. 20. - Ст.205425. - ISSN 1098-0121, DOI 10.1103/PhysRevB.72.205425
Примечания : Cited References: 56
Предметные рубрики: SMALL-PARTICLE COMPOSITES
DIFFUSION-LIMITED AGGREGATION
OPTICAL-PROPERTIES
SELECTIVE PHOTOMODIFICATION
NUMERICAL-SIMULATION
DISORDERED CLUSTERS
ABSORPTION-SPECTRUM
PARTICULATE MATTER
NONLINEAR OPTICS
LIGHT-SCATTERING
Аннотация: We have shown within quasistatic approximation that the giant fluctuations of a local electromagnetic field in random fractal aggregates of silver nanospheres are strongly correlated with a local anisotropy factor S which is defined in this paper. The latter is a purely geometrical parameter which characterizes the deviation of local environment of a given nanosphere in an aggregate from spherical symmetry. Therefore, it is possible to predict the sites with anomalously large local fields in an aggregate without explicitly solving the electromagnetic problem. We have also demonstrated that the average (over nanospheres) value of S does not depend noticeably on the fractal dimension D, except when D approaches the trivial limit D=3. In this case, as one can expect, the average local environment becomes spherically symmetrical and S approaches zero. This corresponds to the well-known fact that in trivial aggregates, fluctuations of local electromagnetic fields are much weaker than in fractal aggregates. Thus, we find that, within the quasistatics, the large-scale geometry does not have a significant impact on local electromagnetic responses in nanoaggregates in a wide range of fractal dimensions. However, this prediction is expected not to be correct in aggregates which are sufficiently large for the intermediate- and radiation-zone interaction of individual nanospheres to become important.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sorensen L. K., Khrennikov D. E., Gerasimov V. S., Ershov A. E., Polyutov S. P., Karpov S. V., Agren H.
Заглавие : Medium dependent optical response in ultra-fine plasmonic nanoparticles
Место публикации : Phys. Chem. Chem. Phys. - 2022. - Vol. 24, Is. 39. - P.24062-24075. - ISSN 14639084 (ISSN), DOI 10.1039/d2cp02929d
Примечания : Cited References: 52. - DEK, VSG, SVK acknowledge the support of the Russian Science Foundation (project no. 18-13-00363). L. K. S. acknowledges the support of Carl Tryggers Stiftelse, project CTS 18-441. We also acknowledge the Swedish National Infrastructure for Computing (SNIC) at the High Performance Computing Center North (HPC2N) partially funded by the Swedish Research Council through grant agreement no. 2021/3-22
Аннотация: We study the influence of media on the interaction of ultra-fine plasmonic nanoparticles (≤ 8 nm) with radiation. The important role of the surface layer of the nanoparticles, with properties that differ from the ones in the inner part, is established. Using an atomistic representation of the nanoparticle material and its interaction with light, we find a highly inhomogeneous distribution of the electric field inside and around the particles. It is predicted that with an increase in the refractive index of the ambient medium, the extension of the surface layer of atoms increases, something that also is accompanied by an enhanced red shift of the plasmon resonance band compared to large particles in which the influence of this layer and its relative volume is reduced. It is shown that the physical origin for the formation of a surface layer of atoms near the nanoparticle boundary is related to the anisotropy of the local environment of atoms in this layer which changes the conditions for the interaction of neighboring atoms with each other and with the incident radiation. It is shown that a growth of the refractive index of the ambient medium results in an increase in the local field in the dielectric cavity in which a plasmonic nanoparticle is embedded and which is accompanied by a growth of the amplitude of the plasmon resonance. We predict that in the ultra-fine regime the refractive index sensitivity shows a decreasing trend with respect to size which is opposite to that for larger particles. With the applied atomistic model this work demonstrates close relations between field distributions and properties of ultra-fine nanoparticles.
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Вид документа : Статья из журнала
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Автор(ы) : Ershov A. E., Gerasimov V. S., Bikbaev R. G., Polyutov S. P., Karpov S. V.
Заглавие : Mode coupling in arrays of Al nanoparticles
Место публикации : J. Quant. Spectrosc. Radiat. Transf. - 2020. - Vol. 248. - Ст.106961. - ISSN 00224073 (ISSN), DOI 10.1016/j.jqsrt.2020.106961
Примечания : Cited References: 81. - The reported study was funded by the grant of the President of Russian Federation (agreement 075-15-2019-676 ); the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science (Grant No.18-42-240013); the State contract with Siberian Federal University for scientific research; Russian Science Foundation project number 19-72-00066 (investigation of finite size effects)
Аннотация: The mechanisms of coupling between the lattice modes of a two-dimensional (2D) array consisting of Al nanoparticles and the localized modes of individual Al nanoparticles have been studied in detail. The results were obtained employing the finite-difference time-domain method (FDTD) and the generalized Mie theory. It was shown that interactions of single particles with 2D lattice modes significantly change the extinction spectra depending on the particle radius and the lattice period. The Rayleigh anomalies of higher orders contribute to formation of hybrid modes resulting in increase of the extinction efficiency in short wavelength range of the spectrum. It was shown that high intensity magnetic modes are excited in aluminum nanoparticles arrays. The patterns of spatial electromagnetic field distribution at the frequencies of hybrid modes have been studied. We note that comprehensive understanding the mode coupling mechanisms in arrays paves the way for engineering different types of modern photonic devices with controllable optical properties.
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