Библиотека института физики им. Л.В. Киренского СО РАН

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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gerasimov V. S., Ershov A. E., Bikbaev R. G., Rasskazov I. L., Isaev I. L., Semina P. N., Kostyukov A. S., Zakomirnyi V. I., Polyutov S. P., Karpov S. V.
Заглавие : Plasmonic lattice Kerker effect in ultraviolet-visible spectral range
Место публикации : Phys. Rev. B. - 2021. - Vol. 103, Is. 3. - Ст.035402. - ISSN 24699950 (ISSN), DOI 10.1103/PhysRevB.103.035402
Примечания : Cited References: 66. - The research was supported by the Ministry of Science and High Education of Russian Federation, Project No. FSRZ-2020-0008, by RFBR, Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science, project number 20-42-240003 and by the Russian Science Foundation (Project No. 18-13-00363) (numerical calculations of phase dependences and corresponding research), A. E. acknowledges the grant of the President of the Russian Federation, agreement No. 075–15–2019–676
Аннотация: Mostly forsaken, but revived after the emergence of all-dielectric nanophotonics, the Kerker effect can be observed in a variety of nanostructures from high-index constituents with strong electric and magnetic Mie resonances. A necessary requirement for the existence of a magnetic response limits the use of generally nonmagnetic conventional plasmonic nanostructures for the Kerker effect. In spite of this, we demonstrate here the emergence of the lattice Kerker effect in regular plasmonic Al nanostructures. Collective lattice oscillations emerging from the delicate interplay between Rayleigh anomalies and localized surface plasmon resonances both of electric and magnetic dipoles, and electric and magnetic quadrupoles result in suppression of the backscattering in a broad spectral range. Variation of geometrical parameters of Al arrays allows for tailoring the lattice Kerker effect throughout UV and visible wavelength ranges, which is close to impossible to achieve using other plasmonic or all-dielectric materials. It is argued that our results set the ground for wide ramifications in the plasmonics and further application of the Kerker effect.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kostyukov A. S., Ershov A. E., Bikbaev R. G., Gerasimov V. S., Rasskazov I. L., Karpov S. V., Polyutov S. P.
Заглавие : Substrate-mediated lattice Kerker effect in Al metasurfaces
Место публикации : J. Opt. Soc. Am. B. - 2021. - Vol. 38, Is. 9. - P.C78-C83. - ISSN 07403224 (ISSN), DOI 10.1364/JOSAB.427939
Примечания : Cited References: 62. - Funding. Russian Foundation for Basic Research, Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science (20-42-240003); Ministry of Science and Higher Education of the Russian Federation (FSRZ-2020-0008)
Аннотация: Surface lattice resonances (SLRs) emerging in regular arrays of plasmonic nanoparticles (NPs) are known to be exceptionally sensitive to the homogeneity of the environment. It is considered necessary to have a homogeneous environment for engineering narrowband SLRs, while in a half-space environment, SLRs rapidly vanish as the contrast between the refractive indices of the substrate and superstrate increases. From this conventional wisdom, it is apparent that the delicate lattice Kerker effect emerging from SLRs and resonances on constituent NPs should be difficult to achieve in a non-homogeneous environment. Using a rigorous theoretical treatment with multipolar decomposition, we surprisingly find and explain a narrowband substrate-mediated lattice Kerker effect in two-dimensional arrays of Al nanocylinders in a half-space geometry. We propose to use this effect for sensing applications and demonstrate its broad tunability across the UV/Vis wavelength range.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volkov N. V., Tarasov A. S., Eremin E. V., Varnakov S. N., Ovchinnikov S. G., Zharkov S. M.
Заглавие : Magnetic-field- and bias-sensitive conductivity of a hybrid Fe/SiO 2/p-Si structure in planar geometry
Место публикации : Journal of Applied Physics: American Institute of Physics, 2011. - Т. 109, № 12. - С. 123924. - ISSN 0021-8979, DOI 10.1063/1.3600056. - ISSN 1089-7550(eissn)
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zakomirnyi V. I., Rinkevicius Z., Baryshnikov G. V., Sorensen L. K., Agren H.
Заглавие : Extended Discrete Interaction Model: Plasmonic Excitations of Silver Nanoparticles
Место публикации : J. Phys. Chem. C. - 2019. - Vol. 123, Is. 47. - P.28867-28880. - ISSN 19327447 (ISSN), DOI 10.1021/acs.jpcc.9b07410
Примечания : Cited References: 64. - H.Å. and V.I.Z. acknowledge the support of the Russian Science Foundation (project no. 18-13-00363). L.K.S. acknowledges the support of Carl Tryggers Stifetelse, project no. CTS 18-441.
Аннотация: We present a new atomistic model for plasmonic excitations and optical properties of metallic nanoparticles, which collectively describes their complete response in terms of fluctuating dipoles and charges that depend on the local environment and on the morphology of the composite nanoparticles. Being atomically dependent, the total optical properties, the complex polarizability, and the plasmonic excitation of a cluster refer to the detailed composition and geometric characteristics of the cluster, making it possible to explore the role of the material, alloy mixing, size, form shape, aspect ratios, and other geometric factors down to the atomic level and making it useful for the design of plasmonic particles with particular strength and field distribution. The model is parameterized from experimental data and, at present, practically implementable for particles up to more than 10 nm (for nanorods even more), thus covering a significant part of the gap between the scales where pure quantum calculations are possible and where pure classical models based on the bulk dielectric constant apply. We utilized the method to both spherical and cubical clusters along with nanorods where we demonstrate both the size, shape, and ratio dependence of plasmonic excitations and connect this to the geometry of the nanoparticles using the plasmon length.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Leksikov A. A., Serzhantov A. M., Govorun I. V., Afonin A. O., Ugryumov A. V., Leksikov An. A.
Заглавие : Microstrip diplexer with Π-shaped matching circuit
Место публикации : Prog. Electromagn. Res. Lett. - 2020. - Vol. 88. - P.59-65. - ISSN 19376480 (ISSN), DOI 10.2528/PIERL19083005
Примечания : Cited References: 15. - The work is supported by the Ministry of science and highest education of the Russian Federation (contract #03.G25.31.0279).
Аннотация: We propose a new method to match diplexer channels with a common port in which a Π-shaped strip conductor is used as a matching circuit. The applicability of the method is illustrated by simulating and fabricating a microstrip diplexer for GPS/GLONASS applications. The central frequencies of the channels are 1.234 GHz and 1.597 GHz, and their fractional bandwidths are 6.8% and 7.3%, respectively; minimum insertion losses are 1.05 dB and 1.08 dB. The main advantage of the diplexer is its compact size: 16.8 mm × 9.0 mm × 6.4 mm in housing. Using 1D models and a quasi-TEM approach, the frequency-dependent coupling coefficients between the matching circuit and input resonators of the channels are calculated, and the influence of the matching circuit’s geometrical parameters on its coupling with diplexer channels is studied. © 2020, Electromagnetics Academy. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Boca M., Molokeev M. S., Rakhmatullin A., Kubikova B., Netriova Z.
Заглавие : The structure of the metastable K18Ta5Zr5F63 phase
Место публикации : New J. Chem. - 2020. - Vol. 44, Is. 22. - P.9264-9270. - ISSN 11440546 (ISSN), DOI 10.1039/d0nj02428g
Примечания : Cited References: 30. - Financial support from TGIR-RMN-THC Fr3050 CNRS for conducting the research is gratefully acknowledged. This work was supported by the Slovak Research and Development Agency under the contract no. APVV-15-0479. This work was financially supported by the Scientific Grant Agency of the Ministry of Education of the Slovak Republic and the Slovak Academy of Sciences, grant no. Vega 2/0024/20
Аннотация: A metastable phase K18Ta5Zr5F63 was prepared by molten salt synthesis of K2TaF7 and K2ZrF6 in a sealed Pt crucible. This is the first example of a structure of a fluoride complex compound containing both tantalum and zirconium as central atoms. The asymmetric part of the unit cell contains two Ta/Zr sites and one pure Zr site. The Ta1/Zr1 ion is coordinated by seven F ions forming one capped trigonal prism. The Ta2/Zr2 ion is coordinated by six F ions forming a trigonal prism, and this polyhedron is fully ordered. The Zr3 ion is coordinated by six F ions, which are disordered over two positions. All (Zr/Ta)Fn (n = 6–8) polyhedra are isolated from each other, although the ZrF6 units have shared faces, forming an infinite channel along the c-axis. 19F MAS NMR experiments agree with the proposed structural model, identifying all five central non-equivalent polyhedra. The K18Ta5Zr5F63 phase decomposes within several months to its initial components; this can be monitored by NMR, DSC and XRD experiments. Moreover, accelerated decomposition can be achieved by thermal treatment, resulting in the formation of a K3ZrF7 phase.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volkov N.V., Eremin E.V., Patrin G.S., Kim P.D.
Заглавие : Magnetic tunnel junction in the current-in-plane geometry: Magnetoresistance; photovoltaic effect
Место публикации : Rare Metals. - 2009. - Vol. 28, Spec. Issue. - С. 170-173
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bhalla, Nikhil, Thakur, Atul, Edelman I. S., Ivantsov R. D.
Заглавие : Endorsing a hidden plasmonic mode for enhancement of LSPR sensing performance in evolved metal–insulator geometry using an unsupervised machine learning algorithm
Место публикации : ACS Phys. Chem. Au. - 2022. - Vol. 2, Is. 6. - P.459-467. - ISSN 2694-2445, DOI 10.1021/acsphyschemau.2c00033
Примечания : Cited References: 35
Аннотация: Large-area nanoplasmonic structures with pillared metal–insulator geometry, also called nanomushrooms (NM), consist of an active spherical-shaped plasmonic material such as gold as its cap and silicon dioxide as its stem. NM is a geometry which evolves from its precursor, nanoislands (NI) consisting of aforementioned spherical structures on flat silicon dioxide substrates, via selective physical or chemical etching of the silicon dioxide. The NM geometry is well-known to provide enhanced localized surface plasmon resonance (LSPR) sensitivity in biosensing applications as compared to NI. However, precise optical phenomenon behind this enhancement is unknown and often associated with the existence of electric fields in the large fraction of the spatial region between the pillars of NM, usually accessible by the biomolecules. Here, we uncover the association of LSPR enhancement in such geometries with a hidden plasmonic mode by conducting magneto-optics measurements and by deconvoluting the absorbance spectra obtained during the local refractive index change of the NM and NI geometries. By the virtue of principal component analysis, an unsupervised machine learning technique, we observe an explicit relationship between the deconvoluted modes of LSPR, the differential absorption of left and right circular polarized light, and the refractive index sensitivity of the LSPR sensor. Our findings may lead to the development of new approaches to extract unknown properties of plasmonic materials or establish new fundamental relationships between less understood photonic properties of nanomaterials.
https://doi.org/10.1021/acsphyschemau.2c00033
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Fedoseev A. D.
Заглавие : Modification of topological corner excitations at the interplay of boundary geometry and Coulomb interaction
Колич.характеристики :9 с
Место публикации : J. Phys. Condens. Matter. - 2023. - Vol. 35, Is. 45. - Ст.455301. - ISSN 09538984 (ISSN), DOI 10.1088/1361-648X/aceddf. - ISSN 1361648X (eISSN)
Примечания : Cited References: 35. - The author thanks S V Aksenov and M M Korovushkin for the fruitful discussions and valuable remarks. The reported study was supported by Russian Science Foundation (Project No. 22-22-20076) and Krasnoyarsk Regional Fund of Science
Аннотация: The effect of Coulomb interaction on the 2D second order topological superconductor is investigated taking into account different geometries of the boundary in the mainframe of the mean-field approximation. The spontaneous symmetry breaking, described earlier in Aksenov et al (2023 Phys. Rev.B 107 125401), is found to be robust against the boundary deformation. Meanwhile, the details of the state with spontaneously broken symmetry is found to be dependent on the specific boundary geometry. Considering different types of the boundary of the 2D system, it is demonstrated that the deviation of the electron density in the broken symmetry state is determined by the position of the zero-dimensional (second-order) excitations with nearly zero energy. The critical value of the Coulomb interaction, at which the transition occurs, is found to be determined by the energy of these excitations, which is non-zero due to overlapping of the wave-functions at different corners.
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10.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Volkov N.V., Eremin E.V., Tarasov A.S., Patrin G.S., Kim P.D., Varnakov S.N., Ovchinnikov S.G.
Заглавие : Magnetic tunnel structures in the current-in-plane geometry: channel switching, magnetoresistance, and photovoltaic effect
Коллективы : Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium, Уральское отделение РАН
Место публикации : IV Euro-Asian Symposium "Trends in MAGnetism" Nanospintronics (EASTMAG-2010). School for young scientist "Spintronics": June 28 - Lule 2, 2010"Book of abstracts. - Ekaterinburg, 2010. - P.38
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