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Вид документа : Однотомное издание (Препринт)
Шифр издания :
Автор(ы) : Karpov S. V., Myslivets S. A., Popov A. K., Slabko V. V.
Заглавие : Nonlinear optical properties of organic dye vapors : preprint. № 701Ф
Выходные данные : Красноярск: ИФ СО АН СССР, 1991
Колич.характеристики :41 с
Коллективы : Академия наук СССР, Сибирское отделение АН СССР, Институт физики им. Л.В. Киренского Сибирского отделения АН СССР
Примечания : Cited References :
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vyunishev A. M., Arkhipkin V. G., Baturin I. S., Akhmatkhanov A. R., Shur, V. Ya, Chirkin A. S.
Заглавие : Multiple nonlinear Bragg diffraction of femtosecond laser pulses in a χ(2) photonic lattice with hexagonal domains
Коллективы : Russian Foundation for Basic Research [15-02-03838]; Government of the Russian Federation (Act 211) [02.A03.21.0006]
Место публикации : Laser Phys. Lett. - 2018. - Vol. 15, Is. 4. - Ст.045401. - ISSN 1612-2011, DOI 10.1088/1612-202X/aaa618. - ISSN 1612-202X(eISSN)
Примечания : Cited References:26. - The work was supported by the Russian Foundation for Basic Research through grant 15-02-03838. ISB, ARA and VYS acknowledge the support of the Government of the Russian Federation (Act 211, Agreement 02.A03.21.0006).
Предметные рубрики: RAMAN-NATH DIFFRACTION
STRUCTURED FUNDAMENTAL WAVE
2ND-HARMONIC
Ключевые слова (''Своб.индексиров.''): nonlinear bragg diffraction--nonlinear photonic lattice--second harmonic--generation--femtosecond pulses
Аннотация: The frequency doubling of femtosecond laser pulses in a two-dimensional (2D) rectangular nonlinear photonic lattice with hexagonal domains is studied experimentally and theoretically. The broad fundamental spectrum enables frequency conversion under nonlinear Bragg diffraction for a series of transverse orders at a fixed longitudinal quasi-phase-matching order. The consistent nonstationary theory of the frequency doubling of femtosecond laser pulses is developed using the representation based on the reciprocal lattice of the structure. The calculated spatial distribution of the second-harmonic spectral intensity agrees well with the experimental data. The condition for multiple nonlinear Bragg diffraction in a 2D nonlinear photonic lattice is offered. The hexagonal shape of the domains contributes to multibeam second harmonic excitation. The maximum conversion efficiency for a series of transverse orders in the range 0.01%-0.03% is obtained.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Popov A. K., Slabko V. V., Tkachenko V. A., Myslivets S. A.
Заглавие : Enhancing coherent nonlinear-optical coupling in hyperbolic metananowaveguides
Коллективы : Novel Optical Materials and Applications, Workshop and Topical Meeting
Место публикации : 13th Workshop and Top. Meet. Novel Opt. Materials and Applications: program. - 2017. - Nonlinear Optics. - P.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Popov A. K., Slabko V. V., Tkachenko V. A., Myslivets S. A.
Заглавие : Extraordinary transient nonlinear-optical processes on the spatially dispersive metasurfaces
Коллективы : Progress in Electromagnetics Research Symposium
Место публикации : Progr. Electromag. Res. Symp. (PIERS): Proceedings. - 2017. - P. 10
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Val'kov V. V., Dzebisashvili D. M., Korovushkin M. M., Barabanov A. F.
Заглавие : Stability of the superconducting d-wave pairing towards the Coulomb repulsions in cuprate superconductors
Коллективы : International symposium on strong nonlinear vibronic and electronic interactions in solids
Место публикации : VI International symposium on strong nonlinear vibronic and electronic interactions in solids: book of abstracts . - 2018. - P.33
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Krinitsin, Pavel, Yelisseyev, Alexander, Jiang, Xingxing, Isaenko, Lyudmila, Molokeev M. S., Lin, Zheshuai, Pugachev, Alexey
Заглавие : Growth, Structure, and Optical Properties of Nonlinear LiGa0.55In0.45Te2 Single Crystals
Коллективы : Russian Foundation of Basic Research [15-02-03408a, 17-45-540775r_a, 17-52-53031]; national scientific foundations of China [11474292, 51702330, 11611530680, 91622118, 91622124]; special foundation of the director of Technical Institute of Physics and Chemistry (TIPC); China "863" project [2015AA034203]; Youth Innovation Promotion Association, CAS [2017035]; [0330-2016-0008]
Место публикации : Cryst. Growth Des. - 2019. - Vol. 19, Is. 3. - P.1805-1814. - ISSN 1528-7483, DOI 10.1021/acs.cgd.8b01788. - ISSN 1528-7505(eISSN)
Примечания : Cited References: 43. - This work was supported by state assignment project #0330-2016-0008 and partially by the Russian Foundation of Basic Research (Grant Nos. 15-02-03408a, 17-45-540775r_a, and 17-52-53031), national scientific foundations of China (Grant Nos. 11474292, 51702330, 11611530680, 91622118, and 91622124), the special foundation of the director of Technical Institute of Physics and Chemistry (TIPC), the China "863" project (No. 2015AA034203) and the Youth Innovation Promotion Association, CAS (outstanding member for Z.L. and Grant 2017035 for X.J.). Some part of the experiments was performed in the multiple-access center "High-Resolution Spectroscopy of Gases and Condensed Matter" at the IA&E SBRAS (Novosibirsk, Russia). The authors are grateful to N. F. Beisel from the Analytical laboratory of the Nikolaev Institute of Inorganic Chemistry SB RAS for atomic-emission spectral analysis of the studied crystals.
Предметные рубрики: PHASE-MATCHING PROPERTIES
ELECTRONIC-STRUCTURE
MID-IR
Аннотация: In search of new nonlinear optical crystals for the mid-IR range, we grew single crystals of LiGa0.55In0.45Te2 (LGITe) of optical quality; its structure was established, and the spectroscopic properties were studied. LGITe crystallizes in a tetragonal chalcopyrite-like (I4̅2d) structure at 667 ± 5 °C. Crystals are transparent in the 0.76–14.8 μm spectral region with some absorption bands related to OH/H2O and Ge–O vibrations. Analysis of the Tauc plots showed that LGITe is a direct band gap semiconductor with the band gap Eg = 1.837 eV at 300 K. The Raman spectrum for LGITe is very similar to that for LiGaTe2: the most intense band A1 near 120 cm–1 corresponds to the Li–Te vibration. DFT calculations were carried out for the first time to simulate the energy band structure (band gap ∼1.67 eV), density of states (DOS), birefringence (0.049 at 2 μm), and nonlinear susceptibility (d14 = d36 = −48.73 pm/V). For ternary LiInTe2 these parameters are Δn = 0.007 and d14 = d36 = −61.4 pm/V, respectively. The calculated optical properties indicate that LiGa0.55In0.45Te2 is a promising mid-IR nonlinear optical crystal with nonlinear parameters higher than those of LiGaTe2.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pyatnov M. V., Vetrov S. Ya., Timofeev I. V.
Заглавие : Tunable hybrid optical modes in a bounded cholesteric liquid crystal with a twist defect
Коллективы : Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund [17-42-240464, 18-42-243025]
Место публикации : Phys. Rev. E. - 2018. - Vol. 97, Is. 3. - Ст.032703. - ISSN 2470-0045, DOI 10.1103/PhysRevE.97.032703. - ISSN 2470-0053(eISSN)
Примечания : Cited References:47. - The reported study was funded by the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund for the research Projects No. 17-42-240464 and No. 18-42-243025.
Предметные рубрики: SCULPTURED THIN-FILMS
STRUCTURE ADJACENT
TAMM PLASMONS
STATES
METAL
Аннотация: Coupling between the defect mode of a cholesteric liquid crystal and the localized mode of a cholesteric liquid crystal-phase plate-metal structure is theoretically demonstrated. It is shown that the transmittance spectrum can be tuned by changing the twist-defect angle and helix pitch, which are governed by external factors. The spectra for different circular polarizations of the incident light are different; specifically, at the nondiffracting polarization, there is no defect-mode transmittance peak.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Popov A. K., Myslivets S. A., Slabko V. V., Tkachenko V. A., George T. F.
Заглавие : Shaping light in backward-wave nonlinear hyperbolic metamaterials
Коллективы : U. S. Army Research Office [W911NF-14-1-0619]; Ministry of Education and Science of the Russian Federation [3.6341.2017/6.7]
Место публикации : Photonics. - 2018. - Vol. 5, Is. 2. - Ст.8. - ISSN 2304-6732, DOI 10.3390/photonics5020008
Примечания : Cited References: 46. - Alexander K. Popov acknowledges support by the U. S. Army Research Office under grant number W911NF-14-1-0619. Vitaly V. Slabko acknowledges support by the Ministry of Education and Science of the Russian Federation (project # 3.6341.2017/6.7).
Предметные рубрики: NEGATIVE-INDEX METAMATERIALS
OPTICAL PARAMETRIC OSCILLATOR
Ключевые слова (''Своб.индексиров.''): optical metamaterials--fundamental concepts in photonics--light-matter--interactions at the subwavelength and nanoscale--fundamental--understanding of linear and nonlinear optical processes in novel metamaterials underpinning photonic devices and components--advancing the frontier of nanophotonics with the associated nanoscience and nanotechnology--nanostructures that can serve as building blocks for nano-optical systems--use of nanotechnology in photonics--nonlinear nanophotonics--plasmonics and excitonics--subwavelength components and negative index materials--slowing, store, and processing light pulses--materials for optical sensing, for tunable optical delay lines, for optical buffers, for high extinction optical switches, for novel image processing hardware, and for highly-efficient wavelength converters
Аннотация: Backward electromagnetic waves are extraordinary waves with contra-directed phase velocity and energy flux. Unusual properties of the coherent nonlinear optical coupling of the phase-matched ordinary and backward electromagnetic waves with contra-directed energy fluxes are described that enable greatly-enhanced frequency and propagation direction conversion, parametrical amplification, as well as control of shape of the light pulses. Extraordinary transient processes that emerge in such metamaterials in pulsed regimes are described. The results of the numerical simulation of particular plasmonic metamaterials with hyperbolic dispersion are presented, which prove the possibility to match phases of such coupled guided ordinary and backward electromagnetic waves. Particular properties of the outlined processes in the proposed metamaterial are demonstrated through numerical simulations. Potential applications include ultra-miniature amplifiers, frequency changing reflectors, modulators, pulse shapers, and remotely actuated sensors.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Konkolovich A. V., Krakhalev M. N., Miskevich A. A., Prishchepa O. O., Zyryanov V. Ya., Loiko V. A.
Заглавие : Semianalytical method to describe small-angle scattering of light by monolayer of polydisperse nematic droplets
Коллективы : International Conference on Coherent and Nonlinear Optics, International Conference on Lasers, Applications, and Technologies
Место публикации : Журнал прикладной спектроскопии. - 2016. - Т. 83: Спецвыпуск, Вып. 6-16, Ч. III-IV. - P.525-526. - ISSN 0514-7506
Аннотация: The approach to describe light scattering by a monolayer of nematic droplets which takes into account shape, anisotropy, director configuration, size distribution, orientation of droplets is worked out and compared with the experimental data.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Loiko V. A., Zyryanov V. Ya., Miskevich A. A., Konkolovich A. V.
Заглавие : Scattering by polymer-dispersed liquid crystal films
Коллективы : International Conference on Coherent and Nonlinear Optics, International Conference on Lasers, Applications, and Technologies
Место публикации : Журнал прикладной спектроскопии. - 2016. - Т. 83: Спецвыпуск, Вып. 6-16, Ч. III-IV. - P.544-545. - ISSN 0514-7506
Аннотация: Scattering and transmittance of films containing liquid crystal droplets with homogeneous and inhomogeneous adhesion on the interface polymer-liquid crystal is investigated by the anomalous diffraction and interference approximations. Point asymmetry in angular pattern is discussed.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Popov A. K., Myslivets S. A.
Заглавие : Generation, amplification, frequency conversion, and reversal of propagation of THz photons in nonlinear hyperbolic metamaterial
Место публикации : Opt. Lett.: Optical Society of America, 2017. - Vol. 42, Is. 20. - P.4151-4154. - ISSN 01469592 (ISSN), DOI 10.1364/OL.42.004151
Примечания : Cited References: 13. - Army Research Office (ARO) (W911NF-14-1-0619); Russian Foundation for Basic Research (RFBR) (15-02-03959A). The authors thank I. S. Nefedov for helpful discussions.
Ключевые слова (''Своб.индексиров.''): carbon--metamaterials--optical frequency conversion--photons--terahertz waves--yarn--directed energy--electromagnetic modes--entangled photons--nonlinear hyperbolic--optical parametric amplification--proof of principles--three wave mixing--thz photon--optical parametric amplifiers
Аннотация: We propose metamaterial (MM) that supports a mixture of three or more normal and backward electromagnetic modes with equal co-directed phase velocities and mutually contra-directed energy fluxes. This enables extraordinary three-wave mixing, greatly enhanced optical parametric amplification, and frequency-changing generation of entangled photons in the reflection direction. Proof-of-principle numerical simulation of such processes is presented based on the particular example of the wave-guided terahertz waves contra-propagating in the MM made of carbon nanotubes.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Rudyak V. Yu., Krakhalev M. N., Sutormin V. S., Prishchepa O. O., Zyryanov V. Ya., Liu J. H., Emelyanenko A. V., Khokhlov A. R.
Заглавие : Electrically induced structure transition in nematic liquid crystal droplets with conical boundary conditions
Коллективы : Russian Science Foundation [16-43-03010]; Ministry of Science and Technology of Taiwan [MOST 105-2923-E-006-007]
Место публикации : Phys. Rev. E. - 2017. - Vol. 96, Is. 5. - Ст.052701. - ISSN 2470-0045, DOI 10.1103/PhysRevE.96.052701. - ISSN 2470-0053(eISSN)
Примечания : Cited References:36. - This study was supported by the joint project of the Russian Science Foundation (Project No. 16-43-03010) and Ministry of Science and Technology of Taiwan (Contract No. MOST 105-2923-E-006-007). The simulations have been performed using the facilities of the Lomonosov Moscow State University Research Computational Center [37].
Предметные рубрики: RIGIDLY FIXED POLES
FRIEDERICKSZ THRESHOLD
ISOTROPIC LIQUID
FIELD
Аннотация: Polymer-dispersed liquid crystal composites have been a focus of study for a long time for their unique electro-optical properties and manufacturing by "bottom-up" techniques at large scales. In this paper, nematic liquid crystal oblate droplets with conical boundary conditions (CBCs) under the action of electric field were studied by computer simulations and polarized optical microscopy. Droplets with CBCs were shown to prefer an axial-bipolar structure, which combines a pair of boojums and circular disclinations on a surface. In contrast to droplets with degenerate planar boundary conditions (PBCs), hybridization of the two structure types in droplets with CBCs leads to a two-minima energy profile, resulting in an abrupt structure transition and bistable behavior of the system. The nature of the low-energy barrier in droplets with CBCs makes it highly sensitive to external stimuli, such as electric or magnetic fields, temperature, and light. In particular, the value of the electric field of the structure reorientation in droplets with CBCs was found to be a few times smaller than the one for droplets with PBCs, and the droplet state remained stable after switching off the voltage.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zakomirnyi V .I., Rasskazov I. L., Gerasimov V. S., Ershov A. E., Karpov S. V., Polyutov S. P.
Заглавие : Multilayered gold nanoshells with ideal absorption for plasmonic photothermal therapy
Коллективы : International Conference on Coherent and Nonlinear Optics, International Conference on Lasers, Applications, and Technologies
Место публикации : Журнал прикладной спектроскопии. - Минск, 2016. - Т. 83, Вып. 6-16. - P.177-178. - ISSN 0514-7506
Аннотация: We study multilayered spherical nanoparticles with ideal absorption [1] for biomedical applications. The core of such particles consists of Si, SiO2 or alternative plasmonic materials [2], such as zinc oxide doped with aluminum, gallium and indium tin oxide whereas the outer shell consists of gold. We develop the algorithm for finding optimal geometry of ideally absorbing Au nanoparticles taking into account the quantum size effect that in multilayered metallic nanoshells plays a significant role.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gerasimov V. S., Ershov A. E., Rasskazov I. L., Zakomirnyi V. I., Gavrilyuk A. P., Karpov S. V., Polyutov S. P.
Заглавие : Surface plasmon resonance of aU nanoparticles in the vicinity of the melting temperature
Коллективы : International Conference on Coherent and Nonlinear Optics, International Conference on Lasers, Applications, and Technologies
Место публикации : Журнал прикладной спектроскопии. - 2016. - Т. 83, Вып. 6-16. - P.103-104. - ISSN 0514-7506
Аннотация: We have demonstrated experimentally the significant suppression of resonant propertiesof single Au nanoparticles at thesurface plasmonfrequency during heating and subsequent transition to the liquid state.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ershov A. E., Gerasimov V. S., Rasskazov, I. L., Zakomirnyi V. I., Gavrilyuk A. P., Karpov S. V., Polyutov S. P.
Заглавие : Thermal effects in optical plasmonic waveguides
Коллективы : International Conference on Coherent and Nonlinear Optics, International Conference on Lasers, Applications, and Technologies
Место публикации : Журнал прикладной спектроскопии. - 2016. - Т. 83: Спецвыпуск, Вып. 6-16. - P.96-97. - ISSN 0514-7506
Аннотация: We investigate the influence of the heating of the optical plasmonic waveguide in the form of chains of the plasmonic nanoparticles by laser radiation on its transmission properties.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Popov A.K., Myslivets S.A.
Заглавие : Nonlinear-optical metamirror
Место публикации : Appl. Phys. A-Mater. Sci. Process. - NEW YORK: SPRINGER, 2011. - Vol. 103, Is. 3. - С. 725-729. - JUN. - ISSN 0947-8396, DOI 10.1007/s00339-010-6218-7
Примечания : Cited Reference Count: 19. - Гранты: This material is based upon work supported by the U.S. Army Research Laboratory and by the U.S. Army Research Office under grant number W911NF-0710261, by the National Science Foundation under Grant No. ECCS-1028353, by the Siberian Division of the Russian Academy of Sciences under Integration Project No 5 and by the Presidium of the Russian Academy of Sciences under Grant No 27.1.Финансирующая организация: U.S. Army Research Laboratory; U.S. Army Research Office [W911NF-0710261]; National Science Foundation [ECCS-1028353]; Siberian Division of the Russian Academy of Sciences [5]; Presidium of the Russian Academy of Sciences [27.1]
Предметные рубрики: NEGATIVE-INDEX METAMATERIALS
LEFT-HANDED METAMATERIALS
SPLIT-RING RESONATORS
2ND-HARMONIC GENERATION
Ключевые слова (''Своб.индексиров.''): all-optical data processing--micro mirror--negative-index--bionics--electromagnetic waves--metamaterials--optical data processing--data handling
Аннотация: The possibility of creation of highly efficient frequency-tunable nonlinear-optical micromirror and all-optical data processing microchip is shown, which utilizes backwardness of electromagnetic waves in negative-index metamaterials.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Solovev P. N., Afonin A. O., Belyaev B. A., Boev N. M., Govorun I. V., Izotov A. V., Ugryumov A. V., Leksikov An. A.
Заглавие : Second harmonic generation in thin permalloy film
Коллективы : Russian Science FoundationRussian Science Foundation (RSF) [19-72-10047]
Место публикации : J. Phys. D. - 2021. - Vol. 54, Is. 42. - Ст.425002. - ISSN 0022-3727, DOI 10.1088/1361-6463/ac1762. - ISSN 1361-6463(eISSN)
Примечания : Cited References: 43. - This work was supported by the Russian Science Foundation under Grant No. 19-72-10047. The equipment of the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center 'Krasnoyarsk Science Center SB RAS' was used during the measurement
Предметные рубрики: FERROMAGNETIC-RESONANCE
MAGNETIZATION DYNAMICS
HARMONIC-GENERATION
FERRITES
Аннотация: Second harmonic generation versus strength and direction of the applied static magnetic field was measured for a thin permalloy (Ni80Fe20) film in a microstrip line at a driving frequency of 1 GHz and maximum input power of ~110 mW. The measurements revealed two peaks in the double frequency signal—in the low static field (~10 Oe) and the high one (~45 Oe). To explain these findings, a macrospin model of a thin magnetic film with in-plane uniaxial magnetic anisotropy was considered. A perturbation expansion of the Landau–Lifshitz–Gilbert equation provided an explanation of the experimental data. The analysis of the model revealed that the low-field peak was caused by the longitudinal second-order magnetization component and the high-field peak by the transversal one. It was also shown that the uniaxial magnetic anisotropy of the film and the dependence of the magnetic damping parameter on the applied field play an important role in the process of the second harmonic generation. The results obtained give insights into some peculiarities of the nonlinear magnetization dynamics that are important in the development of magnetic film-based devices in the field of microwave signal processing and manipulation.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Orlov Yu. S., Nikolaev S. V., Nesterov A. I., Ovchinnikov S. G.
Заглавие : Light-induced ultrafast dynamics of spin crossovers under high pressure
Место публикации : J. Exp. Theor. Phys. - 2021. - Vol. 132, Is. 3. - P.399-415. - ISSN 10637761 (ISSN), DOI 10.1134/S1063776121030079
Примечания : Cited References: 71. - The authors thank the Russian Scientific Foundation for the financial support under the grant 18-12-00022
Аннотация: Within the multielectron model of magnetic insulator with two different spin terms at each cation and spin crossover under high pressure we have studied dynamics of a sudden excited non equilibrium spin state. We obtain the different relaxation of the magnetization, high spin/low spin occupation numbers, and the metal-oxygen bond length for different values of the external pressure. For each pressure-temperature values stationary state agrees to the mean field phase diagrams. We found the long living oscillations of magnetization for the high spin ground state at small pressure. Close to crossover pressure the smooth relaxation is accompanied with a set of sharp strongly non linear oscillations of magnetization and HS/LS occupation numbers that are accompanied by the Franck–Condon resonances.
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19.

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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Atuchin V., Subanakov A., Aleksandrovsky A. S., Bazarov B., Bazarova J., Krylov A. S., Molokeev M. S., Oreshonkov A. S., Pugachev A.
Заглавие : New double nonlinear-optical borate Rb3SmB6O12: Synthesis, structure and spectroscopic properties
Место публикации : J. Alloys Compd. - 2022. - Vol. 905. - Ст.164022. - ISSN 09258388 (ISSN), DOI 10.1016/j.jallcom.2022.164022
Примечания : Cited References: 65. - This work was supported by the Ministry of Science and Higher Education of Russia (project 0273-2021-0008) and the Russian Science Foundation (project 21-19-00046, in part of conceptualization). Also, this study was partly funded by RFBR (project No. 20–33-90188а) and State assignment Basic Project of IA&E SB RAS No 121032400052-6
Аннотация: New noncentrosymmetric alkali rare-earth double borate Rb3SmB6O12 was found in the ternary system Rb2O–Sm2O3–B2O3. The Rb3SmB6O12 powder was prepared by the solid state reaction method at 750 °C for 40 h and the crystal structure was obtained by the Rietveld method. Rb3SmB6O12 crystallized in space group R32 with unit cell parameters a = 13.4874 (3) and c = 30.9398 (6) Å, V = 4874.2 (2) Å3, Z = 15. In the three-dimensional framework structure of Rb3SmB6O12, each [B5O10]5− group is linked to four different Sm-O polyhedra and, likewise, each Sm-O polyhedron is connected to four neighboring [B5O10]5− groups. The Sm-O polyhedra are formed by the face-sharing linked SmO6 octahedra. Rb+ cations are located in large cavities of the framework structure. From the thermal stability measurements, the incongruent melting of Rb3SmB6O12 is observed at 1104 K with as high melting enthalpy as Hm = –161.5 J/g. The nonlinear optical response of Rb3SmB6O12 tested via SHG is estimated to be similar to that of K3YB6O12. The Raman spectrum of Rb3SmB6O12 is mainly governed by the vibrations of BO4 and BO3 borate groups observed over the wavenumber range of 287–1550 cm–1. The spectral bands below 270 cm–1 were attributed to rotational, translational and mixed vibrations of Rb3SmB6O12 structural units. The luminescence spectrum of Sm3+ ions in the specific local environment of the Rb3SmB6O12 crystal lattice shows the ability to control the individual band intensity ratio originating from 4G5/2 level.
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