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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Закомирный, Вадим Игоревич, Герасимов, Валерий Сергеевич, Ершов, Александр Евгеньевич, Карпов, Сергей Васильевич
Заглавие : Узкие резонансы в периодических структурах на основе термостойкого нитрида титана
Коллективы : "Решетневские чтения", международная научно-практическая конференция, Сибирский государственный университет науки и технологий им. акад. М. Ф. Решетнева, Информационные спутниковые системы им. академика М. Ф. Решетнева, АО, Красноярский машиностроительный завод, ОАО
Место публикации : Решетневские чтения: [Электронный ресурс] : материалы XXI Междунар. науч.-практич. конф., посвящ. памяти ген. конструктора ракет.-космич. систем акад. М. Ф. Решетнева : в 2-х ч. : электронное издание. - Красноярск: СибГУим. М. Ф. Решетнева, 2017. - Ч. 1. - С. 609-611
Примечания : Библиогр.: 6
Аннотация: Исследованы возможности применения нитрида титана (TiN) для получения высокодобротного поверхностного резонанса на периодической структуре сферических наночастиц. Полученные данные открывают перспективы для использования 2D массивовиз TiN наночастиц в качестве элементов оптических интегральных микросхем нового поколения.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Утюшев А. Д., Ершов, Александр Евгеньевич, Герасимов, Валерий Сергеевич, Закомирный, Вадим Игоревич, Карпов, Сергей Васильевич
Заглавие : Коллективные решеточные резонансы в диэлектрических наноструктурах при наклонных падениях оптического излучения
Коллективы : "Решетневские чтения", международная научно-практическая конференция, Сибирский государственный университет науки и технологий им. акад. М. Ф. Решетнева, Информационные спутниковые системы им. академика М. Ф. Решетнева, АО, Красноярский машиностроительный завод, ОАО
Место публикации : Решетневские чтения: [Электронный ресурс] : материалы XXIV Междунар. науч.-практич. конф., посвящ. памяти ген. конструктора ракет.-космич. систем акад. М. Ф. Решетнева : в 2-х ч. : электронное издание. - Красноярск: СибГУим. М. Ф. Решетнева, 2020. - Ч. 1. - С. 458-460
Примечания : Библиогр.: 2. - Работа поддержана Министерством науки и высшего образования Российской Федерации, проект номер ФСРЗ-2020-008.
Аннотация: Тонкие нанокомпозитные ZnO/SWCNTs пленки были синтезированы с помощью вакуумной фильтрации и атомно-слоевого осаждения. Были измерены вольт-амперные характеристики образцов пленок. Наосновевольт-амперных характеристик было рассчитано электрическое сопротивление для нанокомпозитных ZnO/ОУНТ пленок.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Rotter I., Sadreev A. F.
Заглавие : Zeros in single-channel transmission through double quantum dots
Место публикации : Phys. Rev. E: AMERICAN PHYSICAL SOC, 2005. - Vol. 71, Is. 4. - Ст.46204. - ISSN 1063-651X, DOI 10.1103/PhysRevE.71.046204
Примечания : Cited References: 28
Предметные рубрики: PHASE EVOLUTION
RESONANCE
TRANSPORT
SYSTEMS
Ключевые слова (''Своб.индексиров.''): fano interference--fano resonances--overlapping resonances--transmission amplitude--channel capacity--eigenvalues and eigenfunctions--function evaluation--hamiltonians--mathematical models--mathematical operators--matrix algebra--resonance--signal interference--semiconductor quantum dots
Аннотация: By using a simple model we consider single-channel transmission through a double quantum dot that consists of two single dots coupled by a wire of finite length L. Each of the two single dots is characterized by a few energy levels only, and the wire is assumed to have only one level whose energy depends on the length L. The transmission is described by using S matrix theory and the effective non-Hermitian Hamilton operator H-eff of the system. The decay widths of the eigenstates of H-eff depend strongly on energy. The model explains the origin of the transmission zeros of the double dot that is considered by us. Mostly, they are caused by (destructive) interferences between neighboring levels and are of first order. When, however, both single dots are identical and their transmission zeros are of first order, those of the double dot are of second order. First-order transmission zeros cause phase jumps of the transmission amplitude by pi, while there are no phase jumps related to second-order transmission zeros. In this latter case, a phase jump occurs due to the fact that the width of one of the states vanishes when crossing the energy of the transmission zero. The parameter dependence of the widths of the resonance states is determined by the spectral properties of the two single dots.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gluck M., Kolovsky A. R., Korsch H. J., Zimmer F.
Заглавие : Wannier-Stark resonances in semiconductor superlattices
Место публикации : Phys. Rev. B: AMERICAN PHYSICAL SOC, 2002. - Vol. 65, Is. 11. - Ст.115302. - ISSN 1098-0121, DOI 10.1103/PhysRevB.65.115302
Примечания : Cited References: 22
Предметные рубрики: ELECTRIC-FIELD
STATES
LADDERS
BREAKDOWN
BLOCH
LOCALIZATION
Аннотация: Wannier-Stark states for semiconductor superlattices in strong static fields, where the interband Landau-Zener tunneling cannot be neglected, are rigorously calculated. The lifetime of these metastable states was found to show multiscale oscillations as a function of the static field, which is explained by an interaction with above-barrier resonances. An equation, expressing the absorption spectrum of semiconductor superlattices in terms of the resonance Wannier-Stark states, is obtained and used to calculate the absorption spectrum in the region of high static fields.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gluck M., Kolovsky A. R., Korsch H. J.
Заглавие : Wannier-Stark resonances in optical and semiconductor superlattices
Место публикации : Phys. Rep.-Rev. Sec. Phys. Lett.: ELSEVIER SCIENCE BV, 2002. - Vol. 366, Is. 3. - P103-182. - ISSN 0370-1573, DOI 10.1016/S0370-1573(02)00142-4
Примечания : Cited References: 234
Предметные рубрики: UNIFORM ELECTRIC-FIELD
QUANTUM CHAOTIC SCATTERING
FRANZ-KELDYSH OSCILLATIONS
METAL-INSULATOR-TRANSITION
ALTERNATING SITE ENERGIES
GAAS-ALAS SUPERLATTICES
RANDOM UNITARY MATRICES
WAVE-GUIDE ARRAYS
BLOCH OSCILLATIONS
PERTURBATION-THEORY
Ключевые слова (''Своб.индексиров.''): wannier-stark resonances--semiconductor superlattices--optical lattices--resonance statistics--quantum chaos--optical lattices--quantum chaos--resonances statistics--semiconductor superlattices--wannier-stark resonances
Аннотация: In this work, we discuss the resonance states of a quantum particle in a periodic potential plus a static force. Originally, this problem was formulated for a crystal electron subject to a static electric field and it is nowadays known as the Wannier-Stark problem. We describe a novel approach to the Wannier-Stark problem developed in recent years. This approach allows to compute the complex energy spectrum of a Wannier-Stark system as the poles of a rigorously constructed scattering matrix and solves the Wannier-Stark problem without any approximation. The suggested method is very efficient from the numerical point of view and has proven to be a powerful analytic tool for Wannier-Stark resonances appearing in different physical systems such as optical lattices or semiconductor superlattices. (C) 2002 Elsevier Science B.V. All rights reserved.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Zakomirnyi V. I., Rasskazov I. L., Gerasimov V. P., Ershov A. E., Ågren H., Polyutov S. P., Karpov S. V.
Заглавие : Ultra-narrow surface lattice resonances in periodic structures of refractory titanium nitride nanodiscs
Коллективы : Novel Optical Materials and Applications, Topical Meeting, OSA Optics and Photonics Congress
Место публикации : 14th Topical Meeting Novel Optical Materials and Applications: program. - 2018. - Polaritonics. - Ст.NOW4J.3. - P.85
Аннотация: We show that regular arrays of TiN nanodiscs support high-Q surface lattice resonances at telecom range. The obtained data open new prospects for utilization of refractory TiN in new photonics interconnects operating at high temperatures.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sadreev A. F., Pilipchuk A. S., Lyapina A. A.
Заглавие : Tuning of Fano resonances by rotation of continuum: Wave faucet
Коллективы : RFBR [17-02-00440]
Место публикации : Europhys. Lett. - 2017. - Vol. 117, Is. 5. - Ст.50011. - ISSN 0295-5075, DOI 10.1209/0295-5075/117/50011. - ISSN 1286-4854(eISSN)
Примечания : Cited References:35. - This work has been supported by RFBR through Grant 17-02-00440. The authors thank E. N. Bulgakov and D. N. Maksimov for helpful discussions.
Предметные рубрики: BOUND-STATES
TRAPPED MODES
ACOUSTIC RESONANCES
Аннотация: We consider wave transmission in a non-axisymmetric waveguide which consists of cylindrical resonator and two semi-infinite cylindrical waveguides whose axes are shifted relative to each other by azimuthal angle Δϕ. Although rotation by Δϕ does not change the eigenfrequency spectrum of the resonator, it effectively tunes the Fano resonances and respectively gives rise to an analog of a faucet opening and closing wave flux under rotation. Moreover, under the rotation of the waveguide and variation of the length of resonator, numerous events of the Fano resonance collapse occur to argue for the bound states in the continuum. In the nearest vicinity of the bound states scattering wave function with orbital angular momentum shows phase dislocations with giant vortical acoustic flows around.
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Вид документа : Статья из сборника (выпуск монографической серии)
Шифр издания :
Автор(ы) : Sadreev A. F., Pilipchuk A. S., Pilipchuk A. A.
Заглавие : Tuning of fano resonance by waveguide rotation: Wave faucet and bound states in the continuum
Место публикации : Fano Resonances in Optics and Microwaves: Physics and Applications/ ed.: E. Kamenetskii, A. Sadreev, A. Miroshnichenko: Springer, 2018. - Vol. 219. - P.497-525. - (Springer Series in Optical Sciences; Vol. 219). - , DOI 10.1007/978-3-319-99731-5_21
Примечания : Cited References: 52. - This work has been supported by RFBR through Grant 17-02-00440. A. S. acknowledges discussions with E. N. Bulgakov, D. N. Maksimov, H. Schanz, P. Seba, L. Sirko, H.-J. Stöckmann and Shubo Wang.
Аннотация: We consider acoustic wave transmission in a non-axisymmetric waveguide composed of a cylindrical resonator of radius R and length L and two cylindrical waveguides of radius rR. The center lines of the waveguides are shifted relative to the center line of the resonator by a distance r0 and relative to each other by an azimuthal angle Δϕ. Under variation of L and fixed Δϕ we find bound states in the continuum (trapped modes) due to full destructive interference of resonant modes leaking into waveguides. Rotation by the angle Δϕ brings complex phases into the coupling strengths of the resonator eigenmodes with propagating modes of the waveguides. As the result interference of neighboring resonances strongly depends on rotation of the waveguide introducing novel way for tuning Fano resonances. In turn rotation of the input waveguide strongly affect the acoustic transmission through the resonator imitating a faucet in wave transmission. Under variation of Δϕ and fixed L we find symmetry protected trapped modes. For Δϕ≠0 these trapped modes contribute to the scattering function supporting high vortical acoustic intensity spinning inside the resonator.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Arkhipkin V. G., Myslivets S. A.
Заглавие : Transmission and reflection spectra of a photonic crystal with a Raman defects
Место публикации : J. Exp. Theor. Phys.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2011. - Vol. 111, Is. 6. - P898-906. - ISSN 1063-7761, DOI 10.1134/S1063776110120022
Примечания : Cited References: 37. - This work was supported by the Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools (project no. NSh-7810.2010.3), the Presidium of the Russian Academy of Sciences (project no. 27.1), the Ministry of Education and Science of the Russian Federation (state contract no. 02.740.11.0220), and the Siberian Branch, Russian Academy of Sciences (integration project no. 5).
Предметные рубрики: ELECTROMAGNETICALLY INDUCED TRANSPARENCY
SLOW-LIGHT
NONLINEAR OPTICS
MICROCAVITIES
LASERS
AMPLIFIER
MODES
Ключевые слова (''Своб.индексиров.''): group velocities--high frequency hf--microwatts--nonlinear refractive index--one dimensional photonic crystal--probe field--pump intensities--raman gain--raman resonances--reflection spectra--spectral position--three level atoms--transmission spectrums--defects--dispersion (waves)--probes--pumping (laser)--pumps--refractive index--resonance--photonic crystals
Аннотация: Features of Raman gain of probe radiation in three-level atoms placed in a defect of a one-dimensional photonic crystal in the presence of laser radiation (pump) at an adjacent high-frequency transition have been theoretically investigated. It has been shown that there is a pump intensity range where narrow peaks (resonances) simultaneously appear in the transmission and reflection spectra of the probe field. Beyond this region, the peak in the transmission spectrum is transformed to a narrow dip. The spectral position of these peaks is determined by the Raman resonance and the transmittance and reflectance can be larger than unity at pump intensities from several microwatts per square centimeter to several tens of milliwatts per square centimeter. The nature of narrow peaks is due to a sharp dispersion of a nonlinear refractive index near the Raman resonance; this dispersion is responsible for a strong decrease in the group velocity of probe radiation. The proposed scheme makes it possible to obtain controlled ultranarrow resonances in the transmission and reflection spectra of the photonic crystal.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sorensen, Lasse K., Khrennikov, Daniil E., Gerasimov, Valeriy S., Ershov, Alexander E., Vysotin M. A., Monti, Susanna, Zakomirnyi, Vadim, I, Polyutov, Sergey P., Agren, Hans, Karpov S. V.
Заглавие : Thermal degradation of optical resonances in plasmonic nanoparticles
Коллективы : Russian Science FoundationRussian Science Foundation (RSF) [18-13-00363]; Carl Tryggers Stifetelse [CTS 18-441]; Swedish Research CouncilSwedish Research CouncilEuropean Commission [SNIC 2020/3-29]
Место публикации : Nanoscale. - 2022. - Vol. 14, Is. 2. - P.433-447. - ISSN 2040-3364, DOI 10.1039/d1nr06444d. - ISSN 2040-3372(eISSN)
Примечания : Cited References: 85. - The work is supported by the Russian Science Foundation (project No. 18-13-00363). L. K. S. acknowledges the support of Carl Tryggers Stifetelse, project CTS 18-441. The authors thank the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center "Krasnoyarsk Science Center SB RAS" for the use of Hitachi S-5500 high-resolution scanning electron microscope for the analysis of nanomaterials. Some of the computations were enabled by resources provided by the Swedish National Infrastructure for Computing (SNIC) at the High Performance Computing Center North (HPC2N) partially funded by the Swedish Research Council through grant agree-ment no. SNIC 2020/3-29. Authors thank Anton Utyushev for technical assistance in preparation of Fig. 3
Предметные рубрики: STABILIZED GOLD NANOPARTICLES
DIPOLE INTERACTION-MODEL
Аннотация: The dependence of plasmon resonance excitations in ultrafine (3-7 nm) gold nanoparticles on heating and melting is investigated. An integrated approach is adopted, where molecular dynamics simulations of the spatial and temporal development of the atoms constituting the nanoparticles generate trajectories out of which system conformations are sampled and extracted for calculations of plasmonic excitation cross sections which then are averaged over the sample configurations for the final result. The calculations of the plasmonic excitations, which take into account the temperature- and size-dependent relaxation of the plasmons, are carried out with a newly developed Extended Discrete Interaction Model (Ex-DIM) and complemented by multilayered Mie theory. The integrated approach clearly demonstrates the conditions for suppression of the plasmons starting at temperatures well below the melting point. We have found a strong inhomogeneous dependence of the atom mobility in the particle crystal lattice increasing from the center to its surface upon the temperature growth. The plasmon resonance suppression is associated with an increase of the mobility and in the amplitude of phonon vibrations of the lattice atoms accompanied by electron-phonon scattering. This leads to an increase in the relaxation constant impeding the plasmon excitation as the major source of the suppression, while the direct contribution from the increase in the lattice constant and its chaotization at melting is found to be minor. Experimental verification of the suppression of surface plasmon resonance is demonstrated for gold nanoparticles on a quartz substrate heated up to the melting temperature and above.
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