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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Arkhipkin V.G,, Myslivets S.A.
Заглавие : A Photonic Crystal with Raman Defect
Коллективы : International Conference on Coherent and Nonlinear Optics, International Conference on Lasers, Applications, and Technologies
Место публикации : Technical digest International conference ICONO/LAT 2010. - Казань, 2010. - Ст.LTuH6
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gerasimova Y. V., Krylov A. S., Vtyurin A. N., Laptash N. M., Goryainov S. V.
Заглавие : A Raman scattering study of the phase transition in the ammonium oxyfluoride (NH4)(3)TiOF5
Разночтения заглавия :авие SCOPUS: A raman scattering study of the phase transition in the ammonium oxyfluoride (NH4)3TiOF5
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2008. - Vol. 50, Is. 8. - P1534-1537. - ISSN 1063-7834, DOI 10.1134/S1063783408080246
Примечания : Cited References: 8
Предметные рубрики: (NH4)(3)WO3F3 OXYFLUORIDE
Аннотация: Raman spectra of a polycrystalline sample of the perovskite-like oxyfluoride (NH4)(3)TiOF5 are measured in the frequency region 100-3600 cm(-1) at temperatures ranging from 91 to 370 K under hydrostatic pressures of up to 9 GPa, which include the range of the phase transition from the orientationally disordered cubic phase to the low-symmetry phase. Anomalies in the spectral parameters due to the phase transition are revealed in the range of vibrations of TiOF5 octahedral groups.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vtyurin A. N., Krylov A. S., Goryainov S. V., Krylova S. N., Oreshonkov A. S., Voronov V. N.
Заглавие : A raman study of hydrostatic pressure induced phase transitions in Rb2KInF6 crystals
Место публикации : Phys. Solid State: MAIK Nauka-Interperiodica / Springer, 2012. - Vol. 54, Is. 5. - P.934-936. - ISSN 1063-7834, DOI 10.1134/S1063783412050472
Примечания : Cited References: 16. - This study was supported by the Russian Foundation for Basic Research (project nos. 11-02-98002-r_sibir' and 09-02-00062), the Siberian Branch of the Russian Academy of Sciences (integration project no. 101), and the Council on Grants from the President of the Russian Federation (grant no. HSh-4645.2010.2).
Предметные рубрики: LATTICE-DYNAMICS
ELPASOLITES
SPECTRA
Аннотация: The Raman spectra of the elpasolite (Rb2KInF6) crystal have been studied in the pressure range from 0 to 5.3 GPa at a temperature of 295 K. A phase transition at a pressure of approximately 0.9 GPa has been found. An analysis of the variations in the spectral parameters has led to the conclusion that the phase transition to a distorted phase is accompanied by the doubling of the volume of the primitive cell of the initial cubic phase. Numerical calculations of the lattice dynamics in the Rb2KInF6 crystal have been performed. The numerical simulation has established that the phase transition at a pressure of 0.9 GPa is associated with condensation of the F (lg) mode. A probable high-pressure phase is the phase with space group C2/m.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Krylov A. S., Gerasimova J. V., Vtyurin A. N., Fokina V. D., Laptash N. M., Voyt E. I.
Заглавие : A study of phase transition in (NH4)(3)WO3F3 oxyfluoride by Raman scattering
Разночтения заглавия :авие SCOPUS: A study of phase transition in (NH4)3WO 3F3 oxyfluoride by Raman scattering
Место публикации : Phys. Status Solidi B. - 2006. - Vol. 243, Is. 2. - P.435-441. - ISSN 0370-1972, DOI 10.1002/pssb.200541259
Примечания : Cited References: 11
Предметные рубрики: ELPASOLITE RB2KSCF6
Аннотация: Raman scattering spectra of perovskite-like (NH4)(3)WO3F3 oxyfluoride are studied in the 70-3600 cm(-1) frequency range and the 93-323 K temperature range including the transition point from orientationally disordered cubic phase into the lower symmetry one. Internal vibrations of ammonium ions and WO3F3 octahedra have been found to exhibit transition anomalies. Analysis of measurements suggests that the transition under study is due mainly to the ordering of octahedra.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Mel'nikova S. V., Grankina V. A., Kartashev A. V.
Заглавие : A study of the effect of gradual substitution NH4 - Cs on phase transitions in NH4LiSO4 crystals
Разночтения заглавия :авие SCOPUS: A study of the effect of gradual substitution NH4 Cs on phase transitions in NH4LiSO4 crystals
Место публикации : Phys. Solid State: AMER INST PHYSICS, 2002. - Vol. 44, Is. 2. - P379-385. - ISSN 1063-7834, DOI 10.1134/1.1451032
Примечания : Cited References: 22
Предметные рубрики: MIXED-CRYSTALS
TEMPERATURE PHASE
LINH4SO4
BIREFRINGENCE
SULFATE
RAMAN
Аннотация: Solid solutions in the Cs-x(NH4)(1 - x)LiSO4 (0 less than or equal to x less than or equal to 0.35) system are grown and investigated. The birefringence (n(a) - n(b)) and the heat capacity are measured in the temperature range 100-530 K. The (x-T) phase diagram is constructed. It is demonstrated that the substitution of cesium for ammonium in the NH4LiSO4 crystal affects the transition temperatures in such a way that the region of the ferroelectric phase increases and the ferroelastic phase disappears at x 0.22. The character of the high-temperature transition remains unchanged (2beta = 0.24 +/- 0.01 for all compositions), but the birefringence anomaly and enthalpy decrease. As the concentration x increases, the low-temperature transition becomes more similar to a first-order transition: the birefringence jump deltan and the temperature hysteresis DeltaT increase. (C) 2002 MAIK "Nauka/Interperiodica".
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Arkhipkin V. G., Myslivets S. A.
Заглавие : All-optical transistor using a photonic-crystal cavity with an active Raman gain medium
Место публикации : Physical Review A - Atomic, Molecular, and Optical Physics. - 2013. - Vol. 88, Is. 3. - Ст.033847. - P. - ISSN 1050-2947, DOI 10.1103/PhysRevA.88.033847
Аннотация: We propose a design of an all-optical transistor based on a one-dimensional photonic-crystal cavity doped with a four-level N-type active Raman gain medium. The calculated results show that in a photonic-crystal cavity of this kind transmission and reflection of the probe (Raman) beam are strongly dependent on the optical switching power. Transmission and reflection of the probe beam can be greatly amplified or attenuated. Therefore the optical switching field can serve as a gate field of the transistor to effectively control propagation of the weak probe field. It is shown that the group velocity of the probe pulse can be controlled in the range from subluminal (slow light) to superluminal (fast light).
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Korshunov A. V., Spiridonov V. P., Shabanov V. F.
Заглавие : An investigation of the temperature dependence of the low frequency raman spectrum of a crystal of Ba(NO3)2
Место публикации : J. Appl. Spectrosc. - 1973. - Vol. 18, Is. 5. - P.677–678. - ISSN 00219037 (ISSN), DOI 10.1007/BF00609342
Примечания : Cited References: 13
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Golovkina E. V., Krylova S. N., Vtyurin A. N., Krylov A. S.
Заглавие : Analyzing the symmetry of the Raman spectra of crystals according to angular dependences
Колич.характеристики :6 с
Место публикации : Bull. Russ. Acad. Sci. Phys. - 2024. - Vol. 88, Is. 5. - P.773-778. - ISSN 10628738 (ISSN), DOI 10.1134/S1062873824706573. - ISSN 19349432 (eISSN)
Примечания : Cited References: 32. - This work was supported by the Russian Foundation for Basic Research, project no. 21-52-12018. The authors are grateful to Dr. Irena Senkovska for providing our DUT-8(Ni) samples
Аннотация: The authors propose a way of reconstructing the Raman tensor by studying the angular dependences of the intensities of the Raman lines of unoriented microcrystals. The technique is verified using familiar calomel Hg2Cl2 crystals. It is shown that the lines on DUT-8 (Ni) crystals indicating phases with open and closed pores have different types of symmetries. The technique can be used to reconstruct the Raman tensor for any unoriented crystalline sample.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pugachev A. M., Zaytseva I. V., Surovtsev N. V., Krylov A. S.
Заглавие : Anharmonicity and local noncentrosymmetric regions in BaTiO3 pressed powder studied by the Raman line temperature dependence
Место публикации : Ceram. Int. - 2020. - Vol. 46, Is. 14. - P.22619-22623. - ISSN 02728842 (ISSN), DOI 10.1016/j.ceramint.2020.06.024
Примечания : Cited References: 26. - The reported study was funded by RFBR , according to the research project No. 18-02-00399 and 19-42-543-016 , Government of Novosibirsk region No. 19-42-543-016 and State assignment No AAAA-A17-117052410033-9. The experiments were performed in the multiple-access center “High-Resolution Spectroscopy of Gases and Condensed Matter” in IA&E SB RAS (Novosibirsk, Russia) and Center for Common Use of the Krasnoyarsk Scientific Center, SB RAS (Krasnoyarsk, Russia)
Аннотация: The temperature dependencies of position, width, and integral amplitude the E(TO) line near 307 cm−1 in Raman spectra in barium titanate powders with different non-hydrostatic pressure and temperature treatment were studied. It was found that parameters of the E(TO) line near 307 cm−1 are different in the crystal, the untreated powder, the powder treated by the non-hydrostatic pressure, and the powder annealed after the pressure treatment. The line width (FWHM) increase with temperature according to Klemens model. It indicates that the origin of the line broadening is the anharmonicity of the E(TO) phonons. The pressure treatment changes the anharmonicity of the phonon potential. It was found that the temperature dependence of the integral intensity of the E(TO) line is similar to that of the second optical harmonic signal and reflects the presence of the local polar regions. Thus, the E(TO) line in the Raman spectrum allows one to characterize the average polarity of local regions and their anharmonicity depending on non-hydrostatic pressures and thermal treatment.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kemper A. F., Korshunov M. M., Devereaux T. P., Fry J. N., Cheng H. P., Hirschfeld P. J.
Заглавие : Anisotropic quasiparticle lifetimes in Fe-based superconductors
Место публикации : Phys. Rev. B: AMER PHYSICAL SOC, 2011. - Vol. 83, Is. 18. - Ст.184516. - ISSN 1098-0121, DOI 10.1103/PhysRevB.83.184516
Примечания : Cited References: 43. - We thank O. Dolgov, R. Hackl, D. Maslov, I. Mazin, B. Muschler, V. Mishra, and J. Schmalian for useful discussions. A. F. K. and T. P. D. thank the Walther MeiBner Institut for their hospitality. A. F. K., M. M. K., and P. J. H. acknowledge support from DOE Grant No. DE-FG02-05ER46236. M. M. K. acknowledges support from RFBR (Grant No. 09-02-00127), Presidium of RAS program "Quantum physics of condensed matter" N5.7, FCP Scientific and Research-and-Educational Personnel of Innovative Russia for 2009-2013 (GK P891), and President of Russia (Grant No. MK-1683.2010.2). A. F. K. and T. P. D. acknowledge support from DOE Grant No. DE-AC02-76SF00515. H.-P. C. and J.N.F. acknowledge DOE/BES Grant No. DE-FG02-02ER45995.
Предметные рубрики: ELECTRONIC RAMAN-SCATTERING
Аннотация: We study the dynamical quasiparticle scattering by spin and charge fluctuations in Fe-based pnictides within a five-orbital model with on-site interactions. The leading contribution to the scattering rate is calculated from the second-order diagrams with the polarization operator calculated in the random-phase approximation. We find one-particle scattering rates which are highly anisotropic on each Fermi surface sheet due to the momentum dependence of the spin susceptibility and the multiorbital composition of each Fermi pocket. This fact, combined with the anisotropy of the effective mass, produces disparity between electrons and holes in conductivity, the Hall coefficient, and the Raman initial slope, in qualitative agreement with experimental data.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Abramova G. M., Petrakovskii G. A., Vtyurin A. N., Rasch J., Krylov A. S., Gerasimova Yu. V., Velikanov D. A., Boehm M., Sokolov V.
Заглавие : Anomalous Raman phenomenon of CuCrS2
Место публикации : J. of Ra man Spectroscopy. - 2010. - Vol. 41, Is. 12. - С. 1485-1488
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12.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Grishina S., Kodera P., Uriarte L. M., Oreshonkov A. S., Maximovich Y., Roginskii E. M., Imko F.
Заглавие : Application of Raman spectroscopy for identification of anhydrous CaCl2, KCaCl3 and K3NaFeCl6 in natural inclusions
Коллективы : Annual Meeting of the German Crystallographic Society, Deutschen Gesellschaft für Kristallographie, Jahrestagung
Место публикации : Zeitschrift für Kristallographie : Supplemente: 26 Jahrestagung Deutschen Gesellschaft für Kristallographie : abstracts. - 2018. - Vol. 38. - P.121. - ISBN 978-3-11-059599-4
Материалы конференции,
Материалы конференции,
Материалы конференции
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Grishina, Svetlana, Kodera, Peter, Goryainov, Sergey, Oreshonkov A. S., Seryotkin, Yurii, Simko, Frantisek, Polozov, Alexander G.
Заглавие : Application of Raman spectroscopy for identification of rinneite (K3NaFeCl6) in inclusions in minerals
Коллективы : Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-05-00682]; European Regional Development FundEuropean Union (EU) [ITMS 26240220086]; Vedecka Grantova Agentura MSVVaS SR a SAV [1/0313/20]
Место публикации : J. Raman Spectrosc. - 2020. - Vol. 51, Is. 12. - P.2505-2516. - ISSN 0377-0486, DOI 10.1002/jrs.6005. - ISSN 1097-4555(eISSN)
Примечания : Cited References: 55. - Russian Foundation for Basic Research, Grant/Award Numbers: 18-05-00682, 18-05-00682; European Regional Development Fund, Grant/Award Number: ITMS 26240220086; Vedecka Grantova Agentura MSVVaS SR a SAV, Grant/Award Number: 1/0313/20
Предметные рубрики: SALT MELT
IRON
DEPOSIT
FLUIDS
TRANSFORMATIONS
FERRIHYDRITE
Аннотация: Solid daughter phases in fluid and salt melt inclusions in minerals provide important clues to characterization of mineral‐forming processes. The analysis of the fluid inclusions often requires the exposure of the daughter minerals. Rinneite (K3NaFeCl6), which is a hygroscopic mineral, decomposes in air and cannot thus be identified by conventional methods. A combined approach has been applied for investigation of synthetic and natural rinneite to acquire its diagnostic Raman spectrum for a nondestructive identification. We used natural rinneite inclusions in halite, suitable for applying a complex of methods, to clear up the reference spectrum. Improved high‐resolution X‐ray diffraction (XRD) data obtained from natural rinneite inclusion are comparable with that of previously published, with similar unit cell dimensions. Polarized Raman spectra of natural inclusions were obtained using different geometries and polarization of the incident and scattered light. Interpretation of experimental Raman spectra was performed within the framework of lattice dynamics simulations and group analysis. Individual spectral bands are interpreted in terms of Raman‐active vibrational modes of K3NaFeCl6 structural units. Raman spectrum of synthetic rinneite with main peaks at 75, 91, 103, 143, 167, 171, 187, and 239 cm−1 agrees well with the spectra of rinneite inclusions in halite from the Nepa potash deposit and rinneite daughter minerals in salt melt inclusions hosted by quartz veinlets from the porphyry gold systems in the Central Slovakia Volcanic Field. This provides a firm basis for any future identification of this mineral worldwide, using nondestructive Raman spectroscopy.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Korshunov M. A., Shabanov V. F.
Заглавие : Boson peak in low-frequency Raman spectra of polymethylmethacrylate
Место публикации : Optoelectron. Instrum. Data Proces.: Allerton Press, 2016. - Vol. 52, Is. 6. - P.580-584. - ISSN 87566990 (ISSN), DOI 10.3103/S875669901606008X
Примечания : Cited References: 23
Ключевые слова (''Своб.индексиров.''): boson peak--raman spectra--anharmonicity--modeling
Аннотация: The role of the local field, anharmonicity, and degree of disorder in the formation of the boson peak has been studied. The low-frequency Raman spectrum of a model polymethylmethacrylate crystal with disorder elements was calculated using the method of atom-atom potentials taking into account the effect of local fields on the spectrum. The calculations were carried out for a crystal containing rigid molecules of an isotactic polymethylmethacrylate oligomer and for a structure with flexible molecules. © 2016, Allerton Press, Inc.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pavlovskii M. S., Shinkorenko A. S., Zinenko V. I.
Заглавие : Calculation of lattice dynamics, elastic and dielectric properties of γ-BiB3O6 and δ-BiB3O6
Коллективы : Council on Grants from the President of the Russian Federation for Support of the "Leading Scientific Schools" [NSh-924.2014.2]
Место публикации : Phys. Solid State: MAIK Nauka-Interperiodica / Springer, 2015. - Vol. 57, Is. 4. - P.675-682. - ISSN 1063, DOI 10.1134/S1063783415040241. - ISSN 10906460(eISSN)
Примечания : Cited References:14. - This study was supported by the Council on Grants from the President of the Russian Federation for Support of the "Leading Scientific Schools" (grant no. NSh-924.2014.2).
Предметные рубрики: BISMUTH BORATE BiB3O6
OPTICAL-PROPERTIES
CRYSTAL
RAMAN
Аннотация: The crystal lattice vibration frequencies, densities of phonon states, elastic moduli, and high-frequency permittivities have been calculated in terms of the density functional theory method for two polymorphs γ-BiB3O6 and δ-BiB3O6. Based on the calculated densities of phonon states, the temperature dependences of the free energies of two considered bismuth triborate modifications have been constructed, and the temperature of the phase transition between these modifications has been determined (1100 K). The structure of a possible nonpolar praphase of δ-BiB3O6 has been proposed. The polarization of δ-BiB3O6 has been estimated as 131 μC/cm2.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Anghel L., Balasoiu M., Ishchenko L. A., Stolyar S. V., Kurkin T. S., Rogachev A. V., Kuklin A. I., Kovalev Yu.S., Raikher Yu.L., Iskhakov R. S., Duca G.
Заглавие : Characterization of bio-synthesized nanoparticles produced by Klebsiella oxytoca
Коллективы : International Workshop on SANS-YuMO User Meeting at the Start-up of Scientific Experiments on the IBR-2M Reactor: Devoted to the 75th Anniversary of Yu M Ostanevich's Birth
Место публикации : Journal of Physics: Conference Series. - 2012. - Vol. 351, Is. 1. - Ст.012005. - P. - ISSN 1742-6588, DOI 10.1088/1742-6596/351/1/012005
Ключевые слова (''Своб.индексиров.''): absorption peaks--biominerals--chemical compositions--exopolysaccharides--ferrihydrites--fitting procedure--ftir spectroscopy--klebsiella oxytoca--model calculations--morphological analysis--radius of gyration--scattering objects--small angle x-ray scattering--structural and morphological properties--structural investigation--uv-vis spectroscopy--water dispersion--water-dispersed--experiments--nanoparticles--polysaccharides--raman spectroscopy--scattering--ultraviolet visible spectroscopy--synthesis (chemical)
Аннотация: Structural and morphological properties of biogenic ferrihydrite nanoparticles produced by bacteria Klebsiella oxytoca are investigated. The stability of water dispersions of biomineral particles produced by Klebsiella oxytoca was monitored by UV-Vis spectroscopy. Their chemical composition was determined by FT-IR spectroscopy. The vibrational spectra of biogenic ferrihydrite nanoparticles revealed typical absorption peaks of exopolysaccharides. Morphological analysis based on Raman spectroscopy indicated the presence of exopolysaccharides on the surface as well as inside the pores of the ferrihydrite nanoparticles. Structural investigations of ultrasonic assisted samples of different concentration of water dispersed particles were performed using small angle X-ray scattering analysis. Model calculations and fitting procedures revealed scattering objects of an elongated shape with 6.73В±0.16 nm radius of gyration. В© Published under licence by IOP Publishing Ltd.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kim J., Shvyd'ko Y., Ovchinnikov S. G.
Заглавие : Charge transfer and Mott-Hubbard excitations in FeBO3: An Fe K-edge resonant inelastic x-ray scattering study
Разночтения заглавия :авие SCOPUS: Charge transfer and Mott-Hubbard excitations in FeBO 3: An Fe K-edge resonant inelastic x-ray scattering study
Место публикации : Phys. Rev. B: AMER PHYSICAL SOC, 2011. - Vol. 83, Is. 23. - Ст.235109. - ISSN 1098-0121, DOI 10.1103/PhysRevB.83.235109
Примечания : Cited References: 67. - Yu.Sh. acknowledges the long-standing effort of his colleagues from the IXS Collaborative Design Team in building MERIX instrument at the XOR-IXS 30-ID beamline at the APS, in particular, J. Hill, S. Coburn (BNL), C. Burns (WMU), E. Alp, T. Toellner, and H. Sinn (APS). He is also indebted to R. Khachatryan (APS), M. Wieczorek (APS), and A. Said (APS) for the help in manufacturing the Ge(620) analyzer. P. Siddons (BNL) is acknowledged for building the microstrip detector for the MERIX spectrometer. The help of the XOR-IXS 30-ID beamline personnel at the Advanced Photon Source: T. Roberts, A. Said, and M. Upton are greatly appreciated. Use of the Advanced Photon Source was supported by the US DOE, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. S.O. acknowledges Russian Academy of Science Physical Department program 5.7 "Strongly correlated electrons," RFFI Grant No. 09-02-00171, RFFI Grant No. 10-02-00251, and the Siberian-Ural integration Project No. 40.
Предметные рубрики: TRANSITION-METAL COMPOUNDS
ELECTRONIC-STRUCTURE
OPTICAL-PROPERTIES
ABSORPTION-SPECTRA
EMISSION SPECTRA
FERROMAGNET
DEPENDENCE
COMPLEXES
RAMAN
Аннотация: Momentum-resolved resonant inelastic x-ray scattering (RIXS) spectroscopy has been carried out successfully at the Fe K-edge for the first time. The RIXS spectra of a FeBO3 single crystal reveal a wealth of information on similar or equal to 1-10 eV electronic excitations. The IXS signal resonates when the incident photon energy approaches the pre-edge (1s-3d) and the main-edge (1s-4p) of the Fe K-edge absorption spectrum. The RIXS spectra measured at the pre-edge and the main-edge show quantitatively different dependences on the incident photon energy, momentum transfer, photon polarization, and temperature. We present a multielectron analysis of the Mott-Hubbard (MH) and charge transfer (CT) excitations, and calculate their energies. Electronic excitations observed in the pre-edge and main-edge RIXS spectra are interpreted as MH and CT excitations, respectively. We propose the electronic structure around the chemical potential in FeBO3 based on the experimental data.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Arkhipkin V. G., Myslivets S. A.
Заглавие : Coherent control of light-pulse propagation in a Raman induced grating
Коллективы : Russian Foundation for Basic Research [15-02-03959]; Siberian Branch of the Russian Academy of Sciences under Complex Program II.2P [0356-2015-0410]
Место публикации : J. Opt.: IOP Publishing, 2017. - Vol. 19, Is. 5. - Ст.055501. - ISSN 2040-8978, DOI 10.1088/2040-8986/aa6498. - ISSN 2040-8986(eISSN)
Примечания : Cited References:26. - This work was supported by the Russian Foundation for Basic Research under Grant No. 15-02-03959 and partially by the Siberian Branch of the Russian Academy of Sciences under Complex Program II.2P (0356-2015-0410).
Предметные рубрики: OPTICS
MEDIA
Ключевые слова (''Своб.индексиров.''): light induced gratings--pulse propagation--raman gain
Аннотация: We study light-pulse propagation in a dynamically controllable periodic structure (grating) resulting from Raman interaction of a weak probe pulse with a standing-wave pump and a second control laser field in. N-type four-level atomic media. The grating is induced due to periodic spatial modulation of the Raman gain in a standing pump field (Raman gain grating). We show that it is possible to control both the probe pulse amplitude and the group velocity of the pulse from subluminal to superluminal by varying the pump or control field. Such a grating is of interest for. all-optical switches and transistors.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Arkhipkin V. G., Myslivets S. A.
Заглавие : Coherent manipulation of the Raman-induced gratings in atomic media
Коллективы : Russian Foundation for Basic Research [15-02-03959]
Место публикации : Phys. Rev. A: American Physical Society, 2016. - Vol. 93, Is. 1. - Ст.013810. - ISSN 1050-2947, DOI 10.1103/PhysRevA.93.013810. - ISSN 1094-1622(eISSN)
Примечания : Cited References:44. - This work was supported by the Russian Foundation for Basic Research through Grant No. 15-02-03959.
Предметные рубрики: ELECTROMAGNETICALLY INDUCED TRANSPARENCY
LIGHT
REFLECTION
OPTICS
Аннотация: We consider dynamically controllable periodic structures (gratings), resulting from Raman interaction of a weak probe field with a standing-wave pump and a second control laser field in four-level atomic media of N type. The gratings under study are induced due to periodic spatial modulation of the Raman gain in a standing pump field and fundamentally differ from the ones based on electromagnetically induced transparency. We show that spectral and transmission properties of these gratings can be controlled with the help of an additional weak field (control field) by varying its intensity or frequency. Small variations of the control field intensity can change the system from opaque to transparent and vice versa and this structure can operate as an all-optical transistor. Such a structure can also be used as a tunable nonlinear mirror with amplification.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vtyurin A. N., Krylov A. S., Shmygol I. V., Shebanin A. P.
Заглавие : Condensation of a soft mode in the Raman spectrum of the second tetragonal phase of CsScF4
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 1997. - Vol. 39, Is. 4. - P632-633. - ISSN 1063-7834, DOI 10.1134/1.1129919
Примечания : Cited References: 4
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