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 Найдено в других БД:Каталог книг и брошюр библиотеки ИФ СО РАН (58)Каталог журналов библиотеки ИФ СО РАН (19)
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Общее количество найденных документов : 245
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1.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pyatnov M. V., Bikbaev R. G., Timofeev I. V., Vetrov S. Ya.
Заглавие : Model of a tunable hybrid Tamm mode-liquid crystal device
Коллективы : Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-52-52006]
Место публикации : Appl. Optics. - 2020. - Vol. 59, Is. 21. - P.6347-6351. - ISSN 1559-128X, DOI 10.1364/AO.395901. - ISSN 2155-3165(eISSN)
Примечания : Cited References: 37. - Russian Foundation for Basic Research (19-52-52006)
Предметные рубрики: PLASMON
PHASE
SENSOR
STATES
Аннотация: A concept of an easily tunable device based on hybrid Tamm modes is proposed. The device can be controlled using a high-sensitivity chiral liquid crystal serving as a mirror. The coupling of the chiral optical Tamm state with the Tamm plasmons is predicted. The Tamm plasmons are excited at different frequencies for the orthogonal linear polarizations, while the chiral Tamm state is excited at only one frequency. The properties of the proposed model are analytically and numerically calculated. The possibility of creating a two- and three-mode laser with tunable characteristics on the basis of the proposed model is discussed.
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2.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ikonnikov, Denis A., Vyunishev A. M.
Заглавие : Tailoring diffraction of light carrying orbital angular momenta
Коллективы : Russian Science FoundationRussian Science Foundation (RSF) [19-12-00203]
Место публикации : Opt. Lett. - 2020. - Vol. 45, Is. 14. - P.3905-3908. - ISSN 0146-9592, DOI 10.1364/OL.389019. - ISSN 1539-4794(eISSN)
Примечания : Cited References: 29. - Russian Science Foundation (19-12-00203).
Предметные рубрики: OPTICAL VORTICES
ENTANGLEMENT
TWEEZERS
Аннотация: A unified approach to controlling the diffraction of light carrying orbital angular momenta (OAM) is developed and experimentally verified in this Letter. This approach allows one to specify not only the number of diffraction maxima, their spatial frequencies, and the intensity distribution between them, but also the OAM in each maximum. It is verified that the approach can be used for structuring both single and multiple beams carrying OAMs. Simulations reveal phase singularities in structured beams. In addition, the approach makes it possible to shape the light in regular and irregular two-dimensional arrays with addressing the OAMs at each site. This approach offers new opportunities for singular optics.
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3.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vetrov S. Ya., Avdeeva A. Yu., Pyatnov M. V., Timofeev I. V.
Заглавие : Hybrid Tamm-cavity modes in photonic crystal with resonant nanocomposite defect layer
Место публикации : Комп. оптика. - 2020. - Т. 44, № 3. - С.319-324. - ISSN 01342452 (ISSN), DOI 10.18287/2412-6179-CO-637; Comput. Opt.
Примечания : Библиогр.: 32. - This research was funded by the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research Project No 18-42-243025
Аннотация: Hybrid optical modes in a one-dimensional photonic crystal with a resonant nanocomposite defect bounded by a metallic layer are studied. The nanocomposite consists of spherical metallic constituents, that are distributed in a dielectric matrix. Transmittance, reflectance, and absorbance spectra of this structure, which is shined by light with normal incidence, are calculated. The possibility of control of the hybrid modes spectral characteristics by changing the thickness of the layer adjacent to the metal, the number of layers, and the nanocomposite filling factor is shown.
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4.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bulgakov E. N., Sadreev A. F.
Заглавие : Resonant bending of silicon nanowires by incident light
Место публикации : Opt. Lett. - 2020. - Vol. 45, Is. 19. - P.5315-5318. - ISSN 01469592 (ISSN), DOI 10.1364/OL.406109
Примечания : Cited References: 29
Аннотация: Coupling of two dielectric wires with a rectangular cross section gives rise to bonding and anti-bonding resonances. The latter is featured by extremal narrowing of the resonant width for variation of the aspect ratio of the cross section and distance between wires. A plane wave resonant to this anti-bonding resonance gives rise to unprecedent enhancement of the optical forces up to several nano Newtons per micrometer length of the wires. The forces oscillate with the angle of incidence of the plane wave but always try to repel the wires. If the wires are fixed at the ends, the light power 1.5mW/µm2 bends wires with length 50 µm by order 100 nm.
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5.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bikbaev R. G., Vetrov S. Ya., Timofeev I. V., Shabanov V. F.
Заглавие : Photosensitivity and reflectivity of the active layer in a Tamm-plasmon-polariton-based organic solar cell
Место публикации : Appl. Opt. - 2021. - Vol. 60, Is. 12. - P.3338-3343. - ISSN 1559128X (ISSN), DOI 10.1364/AO.421374
Примечания : Cited References: 49. - The reported study was funded by the grant of the President of Russian Federation No. MK-46.2021.1.2 and by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project No. 19-42-240004
Аннотация: We report on a model of an organic solar cell in which a photosensitive layer doped with plasmon nanoparticles acts as not only an absorbing element but also a mirror involved in the formation of the Tamm plasmon polariton. It is shown that such solar cells can be fabricated without metal contacts, thus avoiding undesired losses in the system. Methods for an additional increase in the integral absorption by applying metal or dielectric mirrors to the lower boundary of the photonic crystal are proposed. It has been found that the integral absorption in the active layer can be increased by15%compared to classical optimized planar solar cells.
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6.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bikbaev R. G., Maksimov D. N., Pankin P. S., Chen K. -P., Timofeev I. V.
Заглавие : Critical coupling vortex with grating-induced high Q-factor optical Tamm states
Место публикации : Opt. Express. - 2021. - Vol. 29, Is. 3. - P.4672-4680. - ISSN 10944087 (ISSN), DOI 10.1364/OE.416132
Примечания : Cited References: 54. - Funding. Ministry of Science and Technology, Taiwan (108-2923E-009-003-MY3); Russian Foundation for Basic Research (19-52-52006); Council on grants of the President of the Russian Federation (MK-46.2021.1.2)
Аннотация: We investigate optical Tamm states supported by a dielectric grating placed on top of a distributed Bragg reflector. It is found that under certain conditions the Tamm state may become a bound state in the continuum. The bound state, in its turn, induces the effect of critical coupling with the reflectance amplitude reaching an exact zero. We demonstrate that the critical coupling point is located in the core of a vortex of the reflection amplitude gradient in the space of the wavelength and angle of incidence. The emergence of the vortex is explained by the coupled mode theory.
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7.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Maksimov D. N., Gerasimov V. S., Romano S., Polyutov S. P.
Заглавие : Refractive index sensing with optical bound states in the continuum
Место публикации : Opt. Express. - 2020. - Vol. 28, Is. 26. - P.38907-38916. - ISSN 10944087 (ISSN), DOI 10.1364/OE.411749
Примечания : Cited References: 56. - The research was supported by the Ministry of Science and High Education of Russian Federation, project no. FSRZ-2020-008. DNM is grateful to Andrey A. Bogdanov for useful discussion
Аннотация: We consider refractive index sensing with optical bounds states in the continuum (BICs) in dielectric gratings. Applying a perturbative approach we derived the differential sensitivity and the figure of merit of a sensor operating in the spectral vicinity of a BIC. Optimisation design approach for engineering an effective sensor is proposed. An analytic formula for the maximal sensitivity with an optical BIC is derived. The results are supplied with straightforward numerical simulations.
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8.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vyunishev A. M., Arkhipkin V. G.
Заглавие : Quasi-phase-matched second-harmonic generation in nonlinear crystals with harmonic modulation of nonlinearity
Место публикации : Laser Phys. - 2020. - Vol. 30, Is. 4. - Ст.045401. - ISSN 1054660X (ISSN), DOI 10.1088/1555-6611/ab7381
Примечания : Cited References: 20
Аннотация: We propose a new type of nonlinear photonic crystal with the lattice representing a harmonic function of the propagation coordinate. This type of spatial modulation of the quadratic nonlinearity is implemented to enhance the second-harmonic generation (SHG) efficiency. The process resembles that realized in periodic nonlinear photonic crystals with rectangular nonlinearity modulation under quasi-phase-matching. Residual periodic oscillations of the second-harmonic intensity were found. Comparison of the unipolar and bipolar modulations showed that they are equivalent with regard to the oscillations. The SHG efficiency in the harmonic lattices is 1.6 times lower compared with the efficiency corresponding to the quasi-phase-matching in periodic nonlinear photonic crystals with rectangular lattices.
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9.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gunyakov V. A., Krakhalev M. N., Timofeev I. V., Zyryanov V. Ya., Shabanov V. F.
Заглавие : Optical modes of multilayered photonic structure containing nematic layer with abnormal electroconvective rolls [Electronic resource]
Место публикации : ArXiv. - 2019. - Ст.1912.00368
Вид и объем ресурса: Electronic text data
Примечания : Cited References: 30. - We are grateful to M.N. Volochaev for providing TEM micrograph of the mirror.
Предметные рубрики: Optics
Аннотация: Optical modes of a multilayered photonic structure with the twisted nematic liquid crystal as a defect layer have been investigated. The electroconvective flow in the nematic makes a spatially periodic structure in the form of abnormal rolls. Non-adiabatic propagation of polarized light in the defect layer causes unique features of the optical modes corresponding to the ordinary o-waves. The decay of these modes has been demonstrated with increasing voltage due to the effect of cross-polarization diffraction loss. The modes short-wave shift resulting from the contribution of the non-adiabatic geometric phase to the total phase delay of the wave during a round-trip propagation through the photonic structure has been found both experimentally and numerically.
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10.

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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