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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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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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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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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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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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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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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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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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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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11.

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 : Ultra-narrowband selective tunable filters for visible and infrared wavelength ranges [Electronic resource]
Место публикации : ArXiv. - 2019. - Ст.1907.04076
Вид и объем ресурса: Electronic text data
Примечания : Cited References: 57. - The reported study was funded by the Russian Science Foundation (Project No.18-13-00363) (the reflection spectra of plasmonic NPs arrays); 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)(the reflection spectra of all-dielectric NPs arrays); A.E. thanks the grant of the President of Russian Federation (agreement 075-15-2019-676).
Предметные рубрики: Optics
Аннотация: The interaction of non-monochromatic radiation with two types of arrays comprising both plasmonic and dielectric nanoparticles has been studied in detail. We have shown that dielectric nanoparticle arrays 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, whereas plasmonic refractory TiN and chemically stable Au nanoparticle arrays demonstrated high-Q resonances with moderate reflectivity. The spectral position of these resonance lines is determined by the lattice period, as well as the size, shape and material composition of the particles. Moreover, the 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 possibilities for engineering of novel selective tunable optical high-Q filters in a wide range of wavelengths: from visible to middle IR. Several highly refractive dielectric nanoparticle materials with low absorption are proposed for various spectral ranges, such as LiNbO3, TiO2, GaAs, Si, and Ge.
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12.

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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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Loiko V. A., Konkolovich A. V., Miskevich A. A., Krakhalev M. N., Prishchepa O. O., Zyryanov V. Ya.
Заглавие : Small-angle scattering and radiation polarization by a stretched polymer film with nematic liquid crystal droplets having a single-domain structure
Коллективы : Belarusian Republican Foundation for Fundamental Research [F18RA-003]; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Government of Krasnoyarsk krai; Krasnoyarsk Krai Foundation of Science [18-42-243006]
Место публикации : Opt. Spectrosc. - 2020. - Vol. 128, Is. 3. - P.331-338. - ISSN 0030-400X, DOI 10.1134/S0030400X20030121. - ISSN 1562-6911(eISSN)
Примечания : Cited References: 24. - This work was carried out within the framework of the agreement on interacademic collaboration between the National Academy of Sciences of Belarus and Siberian Branch of the Russian Academy of Sciences. It was supported by the Belarusian Republican Foundation for Fundamental Research (project no. F18RA-003). M.N. Krakhalev acknowledges the support of the Russian Foundation for Basic Research, the Government of Krasnoyarsk krai, and Krasnoyarsk Krai Foundation of Science (grant no. 18-42-243006).
Предметные рубрики: IONIC MODIFICATION
LIGHT
Аннотация: The coefficient of directed transmittance of a stretched polymer-dispersed liquid crystal film with a defect-free single-domain liquid crystal droplet structure formed by a stretched surfactant-doped film and the polarization degree of forward-transmitted light in the visible and near-infrared spectrum ranges are studied. Results are presented for the 5CB, E7, and E44 nematic liquid crystals. Dependences of the transmission coefficient and polarizing ability of the film on the photodetector field of view are studied. Relationships allowing one to determine film parameters at which the transmission coefficient and polarizing ability of the films simultaneously reach values close to limit ones (0.5 and ±1.0, respectively) are obtained in the Foldy–Twersky and anomalous diffraction approximations.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ershov A. E., Gerasimov V. S., Isaev I. L., Gavrilyuk A. P., Karpov S. V.
Заглавие : Processes underlying the laser photochromic effect in colloidal plasmonic nanoparticle aggregates*
Коллективы : Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Government of the Krasnoyarsk Territory [18-42-243023]; Krasnoyarsk Regional Fund of Science [18-42-243023]; RF Ministry of Science and Higher Education; Siberian Federal University for Scientific Research; Russian FederationRussian Federation [075-15-2019-676]
Место публикации : Chin. Phys. B. - 2020. - Vol. 29, Is. 3. - Ст.037802. - ISSN 1674-1056, DOI 10.1088/1674-1056/ab6551. - ISSN 1741-4199(eISSN)
Примечания : Cited References: 38. - Project funded by the Russian Foundation for Basic Research, the Government of the Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science (Grant 18-42-243023), the RF Ministry of Science and Higher Education, and the State Contract with Siberian Federal University for Scientific Research. A.E. thanks the grant of the President of Russian Federation (agreement 075-15-2019-676).
Предметные рубрики: SELECTIVE PHOTOMODIFICATION
LIGHT
FORCES
OPTICS
Аннотация: We have studied the dynamic and static processes occurring in disordered multiparticle colloidal Ag aggregates with natural structure and affecting their plasmonic absorption spectra under pico- and nanosecond pulsed laser radiations, as well as the physical origin responsible for these processes. We have shown that depending on the duration of the laser pulse, the mechanisms of laser modification of such aggregates can be associated both with changes in the resonant properties of the particles due to their heating and melting (picosecond irradiation mode) and with the particle shifts in the resonant domains of the aggregates (nanosecond pulses) which depend on the wavelength, intensity, and polarization of the radiation. These mechanisms result in formation of a narrow dip in the plasmonic absorption spectrum of the aggregates near the laser radiation wavelength and affect the shape and position of the dip. The effect of polydispersity of nanoparticle aggregates on laser photochromic reaction has been studied.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Mel'nikova S. V., Laptash N. M., Gorev M. V., Pogoreltsev E. I.
Заглавие : Mixed-valence hydrated iron fluoridotitanate: synthesis, optics and calorimetry
Место публикации : J. Phys. Chem. Solids. - 2020. - Vol. 142. - Ст.109444. - ISSN 00223697 (ISSN), DOI 10.1016/j.jpcs.2020.109444
Примечания : Cited References: 35
Аннотация: Mixed-valence hydrated fluoridotitanate with idealized formula FeTiF6·6H2O is the main product of fluoride processing of natural mineral ilmenite with hydrofluoric acid. Its single crystals were grown and optical and calorimetric experiments were carried out in the temperature range 200–350 K. Charge re-distribution, Fe2+Ti4+ to Fe3+Ti3+, in the compound studied was evident in XPS spectra. A first order ferroelastic phase transition occurs at temperatures T0↓ = 271.5 K, T0↑ = 274 ÷ 275.5 K with the symmetry change P3‾↔ P1‾. The structural transformation is accompanied by the appearance of a very weak optical anisotropy in the slice (001), a small anomaly of the heat capacity (ΔS = 1.5 J/mol K = 0.2R), and positive baric coefficients dT0/dp ≈ 30 ± 10 K/GPa.
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16.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Aleksandrovsky A.S., Vyunishev A.M., Zaitsev A.I., Ikonnikov A.A., Pospelov G.I., Slabko V.V.
Заглавие : Phase matched conversion of radiation in nonlinear photonic crystals of strontium tetraborate
Место публикации : Proceedings of SPIE - The International Society for Optical Engineering. - 2011. - Vol. 7993: ICONO 2010: International Conference on Coherent and Nonlinear Optics (23 August 2010 through 26 August 2010, Kazan, ) Conference code: 83828. - ISBN 0277786X (ISSN); 9780819485663 (ISBN), DOI 10.1117/12.872943
Ключевые слова (''Своб.индексиров.''): nonlinear photonic crystal--random quasi phase matching--second harmonic generation--strontium tetraborate--average power--deep uv--enhancement factor--fs pulse--monodomains--nonlinear photonic crystals--quasi-phase-matched frequency doubling--radiation source--random quasi phase matching--rotational shift--second harmonic generation--tetraborate--tuning ranges--band structure--harmonic generation--nonlinear optics--optical materials--phase matching--quantum optics--strontium--photonic crystals
Аннотация: Random quasi-phase-matched frequency doubling of fs pulses to the deep UV was obtained in 1D nonlinear photonic crystal (NPC) of strontium tetraborate. Tuning range of generated radiation is from 187.5 to 215 nm. The spectrum of generated radiation consists from series of peaks with the width of order of 1 A. These peaks are the manifestation of the NPC band structure. Using fs oscillator as the fundamental radiation source, maximum average power of generated radiation is of order 1 ?W, the enhancement factor with respect to monodomain sample being of order of several hundred. The red rotational shift of NPC band structure is experimentally demonstrated. © 2011 SPIE.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Wu C. Y., Hsu J. S., Lee W., Zou Y. H., Timofeev I., Zyryanov V. Y., Lin Y. T.
Заглавие : Tunable bi-functional photonic device based on one-dimensional photonic crystal infiltrated with a bistable liquid-crystal layer
Место публикации : Optics Express: Optical Society of America, 2011. - Т. 19, № 8. - С. 7349-7355. - ISSN 1094-4087, DOI 10.1364/OE.19.007349
РИНЦ
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shalaev M.I., Slabko V.V., Myslivets S. A., Popov A.K.
Заглавие : Negative group velocity and three-wave mixing in dielectric crystals
Место публикации : Opt. Lett. - 2011. - Vol. 36, Is. 19. - P.3861-3863. - ISSN 0146-9592, DOI 10.1364/OL.36.003861
Примечания : Cited Reference Count: 15. - Гранты: This work was supported in part by the Russian Federal Program on Science, Education and Innovation under Grant No. 2010-121-102-018, by the Presidium of the Russian Academy of Sciences under Grant No. 27.1, by the Siberian Division of the Russian Academy of Sciences under Integration Project No. 5, and by the U.S. National Science Foundation (NSF) under Grant ECCS-1028353.Финансирующая организация: Russian Federal Program on Science, Education and Innovation [2010-121-102-018]; Presidium of the Russian Academy of Sciences [27.1]; Siberian Division of the Russian Academy of Sciences [5]; U.S. National Science Foundation (NSF) [ECCS-1028353]
Предметные рубрики: INDEX METAMATERIALS
PARAMETRIC AMPLIFICATION
2ND-HARMONIC GENERATION
OSCILLATOR
Ключевые слова (''Своб.индексиров.''): negative group velocity--negative-index--non-linear optical--optical parametric amplification--plasmonic--three wave mixing--electromagnetic waves--electromagnetism--metamaterials--photonic devices--light velocity
Аннотация: We investigate extraordinary features of optical parametric amplification of Stokes electromagnetic waves that originate from the three-wave mixing of a backward phonon wave with negative group velocity and two ordinary electromagnetic waves. Such properties were earlier shown to exist only in plasmonic negative-index metamaterials that are very challenging to fabricate. Nonlinear optical photonic devices with properties similar to those predicted for negative-index metamaterials are proposed. (C) 2011 Optical Society of America
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19.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Edel’man I.S.
Заглавие : Magneto-optics of ferromagnetic metals nanoparticles fabricated by ion implantation in dielectric matrix
Коллективы : International Conference Functional Materials
Место публикации : International Conference Functional Materials (ICFM-2011): Book of abstracts : [3-8 Oct. 2011, Crimea, Ukraine]. - 2011. - С. 163
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20.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Aleksandrovsky A. S., Vyunishev A. M., Zaitsev A. I., Ikonnikov A. A., Pospelov G. I., Slabko V. V.
Заглавие : Nonlinear optics of randomly structured strontium tetraborate
Коллективы : Conference on Lasers and Electro-Optics Europe, European Quantum Electronics Conference
Место публикации : CLEO/Europe-EQEC 2011: IEEE, 2011. - С. 84
Аннотация: Strontium tetraborate (SBO) is attractive for nonlinear optics of short-wavelength range including VUV due to its transparency window [1]. Nonlinear coefficients of SBO are the largest among crystals transparent below 270 nm. Angular phase matching is, however, absent in SBO, and the only possibility of conversion enhancement is to employ self-organized random nonlinear photonic crystal (NPC) structures discovered in SBO. These NPC are capable of two limiting cases of phase matching, namely, nonlinear diffraction (NLD) and random quasi phase matching (RQPM). NLD allows detection of NPCs and testing their reciprocal superlattice vectors (RSV) spectra via variation of the incidence angle. NLD conversion of broadband fs pulses of modest power from Ti:S oscillator results in 1.9% efficiency, being, to our knowledge, the best result obtained for this type of phase matching. RSV spectrum is wide enough to ensure NLD tunability from 355 to 510 nm. This spectrum is not flat, but the narrowing of the generated radiation spectrum due to non-flatness is rather modest.
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