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Deich, L. I.
Low-frequency raman-scattering in glasses / L. I. Deich // Phys. Rev. B. - 1995. - Vol. 51, Is. 13. - P. 8131-8139, DOI 10.1103/PhysRevB.51.8131. - Cited References: 32 . - ISSN 0163-1829

РУБ Physics, Condensed Matter
Рубрики:
AMORPHOUS SOLIDS
   VITREOUS SILICA
   THERMAL-CONDUCTIVITY
   LIGHT-SCATTERING
   TEMPERATURE
   STATES
   MODES
   HEAT

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Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Дейч, Лев Исаакович
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Iskhakov, R. S.
Experimental study of the energy gap in the spin-wave spectrum in Co/Pd multilayer films / R. S. Iskhakov, I. V. Gavrishin, L. A. Chekanova // JETP Letters. - 1996. - Vol. 63, Is. 12. - P. 989-993, DOI 10.1134/1.567132. - Cited References: 20 . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
LAYERED MAGNETIC-STRUCTURES
   RESONANCE
   MODES
   FMR
Аннотация: The energy gap appearing in the spin-wave spectrum as a result of Bragg scattering by the modulation period q = 2 pi/(d(1)+d(2)) Of a one-dimensional superlattice is observed by the method of spin-wave resonance in Co/Pd multilayer films. It is shown that this gap is asymmetric: The ''positive'' deviation is from two to three times greater than the ''negative'' deviation. (C) 1996 American Institute of Physics.

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Доп.точки доступа:
Gavrishin, I. V.; Chekanova, L. A.; Чеканова, Лидия Александровна; Исхаков, Рауф Садыкович
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Multiple bound states in scissor-shaped waveguides / E. N. Bulgakov [et al.] // Phys. Rev. B. - 2002. - Vol. 66, Is. 15. - Ст. 155109, DOI 10.1103/PhysRevB.66.155109. - Cited References: 32 . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
QUANTUM WAVE-GUIDES
   HELMHOLTZ EQUATION
   RADIATION-FIELD
   HALL RESISTANCE
   RESONANCES
   WIRES
   PROPAGATION
   MODES
Аннотация: We study bound states of the two-dimensional Helmholtz equations with Dirichlet boundary conditions in an open geometry given by two straight leads of the same width which cross at an angle theta. Such a four-terminal junction with a tunable theta can realized experimentally if a right-angle structure is filled by a ferrite. It is known that for theta=90degrees there is one proper bound state and one eigenvalue embedded in the continuum. We show that the number of eigenvalues becomes larger with increasing asymmetry and the bound-state energies are increasing as functions of theta in the interval (0,90degrees). Moreover, states which are sufficiently strongly bound exist in pairs with a small energy difference and opposite parities. Finally, we discuss how the bound states transform with increasing theta into quasibound states with a complex wave vector.

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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Acad Sci Czech Republ, Inst Nucl Phys, CZ-25068 Rez, Czech Republic
Czech Tech Univ, Doppler Inst, Prague 11519, Czech Republic
Linkoping Univ, Dept Phys & Measurement Technol, S-58183 Linkoping, Sweden
ИФ СО РАН

Доп.точки доступа:
Bulgakov, E. N.; Булгаков, Евгений Николаевич; Exner, P.; Pichugin, K. N.; Пичугин, Константин Николаевич; Sadreev, A. F.; Садреев, Алмаз Фаттахович
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Shabanov, A. V.
Reflection spectrum of a cholesteric liquid crystal with structural defects / A. V. Shabanov, S. Y. Vetrov, A. Y. Karneev // JETP Letters. - 2004. - Vol. 80, Is. 3. - P. 181-184, DOI 10.1134/1.1808846. - Cited References: 13 . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
MODES
Аннотация: An expression is obtained for the reflection coefficient of circularly polarized light normally incident on the film of a cholesteric liquid crystal with a variable helix pitch. It is shown that, in the case of a single defect (local change in the helix pitch), the spectrum of light reflection from a cholesteric acquires a dip corresponding to the defect mode. New qualitative features appear in the reflection spectrum of a cholesteric with two defects as the distance between them varies. (C) 2004 MAIK "Nauka/Interperiodica".

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
Krasnoyarsk State Tech Univ, Krasnoyarsk 660074, Russia
ИФ СО РАН
Kirenskii Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Krasnoyarsk State Technical Unversity, Krasnoyarsk, 660074, Russian Federation

Доп.точки доступа:
Vetrov, S. Y.; Karneev, A. Y.; Шабанов, Александр Васильевич
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Bulgakov, E. N.
Bound States in Photonic Fabry-Perot Resonator Comprised of Two Nonlinear Off-Channel Defects / E. N. Bulgakov, A. F. Sadreev // JETP Letters. - 2009. - Vol. 90, Is. 12. - P. 744-749, DOI 10.1134/S0021364009240023. - Cited References: 32. - We thank Kostya Pichugin for many helpful discussions. The work was partially supported by the Russian Foundation for Basic Research, project no. 09-02-98005-Siberia. . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
SCATTERING-THEORY
   WAVE-GUIDE
   CONTINUUM
   MODES
Аннотация: Two off-channel nonlinear defects coupled to the photonic waveguide constitute the Fabry-Perot interfer-ometer (FPR). The defects are made from a Kerr-like nonlinear material. For the linear case such a FPR can support the bound states in the form of standing waves between the defects if the distance between them is quantized. For the nonlinear case the bound states appear for arbitrary distance between the defects however for an quantized electromagnetic intensity. For the transmission through FPR we reveal new resonances and show these are a result of coupling of the bound states with incident wave because of nonlinearity of the defects. The resonances are spaced at the eigen frequencies of bound states.

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Держатели документа:
[Bulgakov, E. N.
Sadreev, A. F.] Russian Acad Sci, Inst Phys, Krasnoyarsk 660036, Russia
[Bulgakov, E. N.] Siberian State Aerosp Univ, Krasnoyarsk, Russia
ИФ СО РАН
Institute of Physics, Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Siberian State Aerospace University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич; Russian Foundation for Basic Research [09-02-98005-Siberia]
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Belyaev, B. A.
Micromagnetic calculation of the equilibrium distribution of magnetic moments in thin films / B. A. Belyaev, A. V. Izotov, A. A. Leksikov // Phys. Solid State. - 2010. - Vol. 52, Is. 8. - P. 1664-1672, DOI 10.1134/S1063783410080160. - Cited References: 17. - This study was supported by the Council on Grants from the President of the Russian Federation (grant no. 3818.2008.3), the Siberian Branch of the Russian Academy of Sciences (integration project no. 5), the Presidium of the Russian Academy of Sciences (project no. 27.1), and the Ministry of Education and Science of the Russian federation (state contract nos. 02.740.11.0220 and 02.740.11.0568. . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
SIMULATIONS
   ANISOTROPY
   NANOPARTICLES
   MODES
Аннотация: A new approach has been proposed for determining an equilibrium configuration of magnetic moments in condensed matter in terms of its discrete model. The solution to this problem is reduced to a system of linear inhomogeneous equations with undetermined Lagrange multipliers. The possibility of numerically solving these systems has been shown using a modified power method. The efficiency of the method has been demonstrated for the model of a thin magnetic film with a nonuniform distribution of the uniaxial magnetic anisotropy over the area. The dependence of the coercive force on the uniaxial anisotropy of nanocrystallites, their exchange interaction, and other parameters of samples has been investigated.

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Держатели документа:
[Belyaev, B. A.
Leksikov, An. A.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Izotov, A. V.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, pr. Svobodnyi 79, Krasnoyarsk 660041, Russian Federation

Доп.точки доступа:
Izotov, A. V.; Изотов, Андрей Викторович; Leksikov, An. A.; Лексиков, Андрей Александрович; Беляев, Борис Афанасьевич
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Arkhipkin, V. G.
Transmission and reflection spectra of a photonic crystal with a Raman defects / V. G. Arkhipkin, S. A. Myslivets // J. Exp. Theor. Phys. - 2011. - Vol. 111, Is. 6. - P. 898-906, DOI 10.1134/S1063776110120022. - Cited References: 37. - This work was supported by the Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools (project no. NSh-7810.2010.3), the Presidium of the Russian Academy of Sciences (project no. 27.1), the Ministry of Education and Science of the Russian Federation (state contract no. 02.740.11.0220), and the Siberian Branch, Russian Academy of Sciences (integration project no. 5). . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
ELECTROMAGNETICALLY INDUCED TRANSPARENCY
   SLOW-LIGHT
   NONLINEAR OPTICS
   MICROCAVITIES
   LASERS
   AMPLIFIER
   MODES
Кл.слова (ненормированные):
Group velocities -- High frequency HF -- Microwatts -- Nonlinear refractive index -- One dimensional photonic crystal -- Probe field -- Pump intensities -- Raman gain -- Raman resonances -- Reflection spectra -- Spectral position -- Three level atoms -- Transmission spectrums -- Defects -- Dispersion (waves) -- Probes -- Pumping (laser) -- Pumps -- Refractive index -- Resonance -- Photonic crystals
Аннотация: Features of Raman gain of probe radiation in three-level atoms placed in a defect of a one-dimensional photonic crystal in the presence of laser radiation (pump) at an adjacent high-frequency transition have been theoretically investigated. It has been shown that there is a pump intensity range where narrow peaks (resonances) simultaneously appear in the transmission and reflection spectra of the probe field. Beyond this region, the peak in the transmission spectrum is transformed to a narrow dip. The spectral position of these peaks is determined by the Raman resonance and the transmittance and reflectance can be larger than unity at pump intensities from several microwatts per square centimeter to several tens of milliwatts per square centimeter. The nature of narrow peaks is due to a sharp dispersion of a nonlinear refractive index near the Raman resonance; this dispersion is responsible for a strong decrease in the group velocity of probe radiation. The proposed scheme makes it possible to obtain controlled ultranarrow resonances in the transmission and reflection spectra of the photonic crystal.

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Оригинал на русском языке Спектры пропускания и отражения фотонного кристалла с рамановским дефектом [Текст] / В. Г. Архипкин, С. А. Мысливец // Журнал экспериментальной и теоретической физики. - Москва : Федеральное государственное унитарное предприятие "Академический научно-издательский, производственно-полиграфический и книгораспространительский центр Российской академии наук "Издательство "Наука", 2010. - Т. 138 № 6. - С. 1018-1027

Держатели документа:
[Arkhipkin, V. G.] Russian Acad Sci, Kirenskii Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Krasnoyarsk 660041, Russian Federation

Доп.точки доступа:
Myslivets, S. A.; Мысливец, Сергей Александрович; Архипкин, Василий Григорьевич
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Bulgakov, E. N.
Giant optical vortex in photonic crystal waveguide with nonlinear optical cavity / E. N. Bulgakov, A. F. Sadreev // Phys. Rev. B. - 2012. - Vol. 85, Is. 16. - Ст. 165305, DOI 10.1103/PhysRevB.85.165305. - Cited References: 43. - The work is partially supported by RFBR grant 12-02-00483. We thank D. N. Maksimov and K. N. Pichugin for assistance in the manuscript preparation. . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
SYMMETRY-BREAKING
   FIBER
   MICROCAVITIES
   COUPLER
   INSTABILITIES
   GRATINGS
   MODES
   LIGHT
Аннотация: We consider light transmission in a directional photonic crystal waveguide that holds a nonlinear defect with two resonant dipole modes within the light propagation band. For the defect positioned on the center line of the waveguide, there are two ways to break the mirror symmetry with respect to either light intensity or light phase. The latter results in a giant vortex of the Poynting vector of the power current within the defect exceeding the input current by, at least, two orders of magnitude. We also consider the breaking of symmetry relative to the mirror reflection with respect to the cross-sectional axis of the waveguide when light is injected equally into both ends of the waveguide. This leads to different light outputs determined by the vorticity of the optical vortex.

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Держатели документа:
[Bulgakov, Evgeny N.
Sadreev, Almas F.] LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
[Bulgakov, Evgeny N.] Sibian State Aerosp Univ, Krasnoyarsk, Russia

Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич
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Korshunov, M. A.
Molecular dynamics investigation of the helical structure of smectic C* / M. A. Korshunov, A. V. Shabanov // Phys. Solid State. - 2012. - Vol. 54, Is. 8. - P. 1704-1708, DOI 10.1134/S106378341208015X. - Cited References: 34 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
LIQUID-CRYSTALS
   SHORT-PITCH
   FORCE-FIELD
   SIMULATIONS
   MODES
   PHASE
   DOBAMBC
   POWER
Аннотация: The numerical simulation of the behavior of the molecules of the DOBAMBC liquid crystal by the molecular dynamics method allowed us to find the change of the the conformation of molecules as a function of temperature and to reveal the helical structures with various pitches in the smectic phase C*. These results explained the anomalous temperature dependences of the order parameter at the molecular level, as well as the optical second harmonic generation in the region of smectic A.

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Публикация на русском языке Коршунов, Михаил Анатольевич. Исследование геликоидальной структуры смектика C* методом молекулярной динамики [Текст] / М. А. Коршунов, А. В. Шабанов // Физ. тверд. тела : Физико-технический институт им. А.Ф.Иоффе РАН, 2012. - Т. 54 Вып. 8. - С. 1596-1599

Держатели документа:
[Korshunov, M. A.
Shabanov, A. V.] Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia
Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences, Akademgorodok 50-38, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Shabanov, A. V.; Шабанов, Александр Васильевич; Коршунов, Михаил Анатольевич
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10.

Pichugin, K. N.
Analysis of a channel-drop filter based on dispersive waveguides and two resonant cavities / K. N. Pichugin, A. F. Sadreev // J. Opt. - 2013. - Vol. 15, Is. 3. - Ст. 35502. - P. , DOI 10.1088/2040-8978/15/3/035502. - Cited References: 35. - The work is partially supported by RFBR grant 13-07-98018-a and RFBR grant 'Sibir' 13-07-00497 . - ISSN 2040-8978

РУБ Optics
Рубрики:
PHOTONIC CRYSTAL SLABS
   REFLECTION FEEDBACK
   MODES
   DESIGN
Кл.слова (ненормированные):
channel dropping -- dispersive waveguides -- optical micro-cavities
Аннотация: By use of coupled-mode theory we analyze a channel add-drop filter based on two dispersive waveguides symmetrically coupled with two resonant optical cavities. We show new solutions for the channel-drop filter processes compared to the solutions found by Manolatou et al (1999 IEEE J. Quantum Electron. 35 1322). For a special choice of the dispersion of the waveguides, we reveal a frequency region with sufficient total reflection.

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Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Пичугин, Константин Николаевич
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