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Bulgakov, E. N.
Symmetry breaking for transmission in a photonic waveguide coupled with two off-channel nonlinear defects / E. N. Bulgakov, K. N. Pichugin, A. F. Sadreev // Phys. Rev. B. - 2011. - Vol. 83, Is. 4. - Ст. 45109, DOI 10.1103/PhysRevB.83.045109. - Cited References: 50. - This work was partially supported by RFBR Grant No. 09-02-98005-"Siberia" and RFBR Grant No. 11-02-00289. . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
CRYSTAL-CIRCUITS
   LOCALIZED MODES
   BISTABILITY
   IMPURITIES
   RESONANCE
   CAVITIES
   STATES
   MEDIA
Аннотация: We consider light transmission in a two-dimensional (2D) photonic crystal waveguide coupled with two identical nonlinear defects positioned symmetrically aside the waveguide. With the coupled mode theory, we show three scenarios for the transmission. The first one inherits the linear case and preserves the symmetry. In the second scenario, the symmetry is broken because of different light intensities at the defects. In the third scenario, the intensities at the defects are equal but phases of complex amplitudes are different. That results in a vortical power flow between the defects similar to the dc Josephson effect if the input power over the waveguide is applied and the defects are coupled. All of these phenomena agree well with computations based on an expansion of the electromagnetic field into optimally adapted photonic Wannier functions in a 2D photonic crystal.

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Держатели документа:
[Bulgakov, Evgeny
Pichugin, Konstantin
Sadreev, Almas] LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
[Bulgakov, Evgeny] Siberian State Aerosp Univ, Krasnoyarsk, Russia

Доп.точки доступа:
Pichugin, K. N.; Пичугин, Константин Николаевич; Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич
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Fractal dimension of cluster boundaries in porous polycrystalline HTSC materials / A. A. Bykov [et al.] // Phys. Solid State. - 2012. - Vol. 54, Is. 10. - P. 1947-1950, DOI 10.1134/S1063783412100095. - Cited References: 20 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
CURRENT-VOLTAGE CHARACTERISTICS
   ELECTRICAL-CONDUCTIVITY
   PERCOLATION
   MIXTURES
   MEDIA
   SUPERCONDUCTORS
   TRANSPORT
   SPHERES
Аннотация: The fractal dimension of the boundaries of clusters formed by pores and granules in polycrystalline materials is shown to be determined by the sample density and crystallite sizes. The dependence of the fractal dimension on the density has a maximum. It is shown that the maximum diamagnetic response can be obtained in a porous high-temperature superconductor with a porosity of 50-60% and small crystallite sizes.

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Публикация на русском языке Фрактальная размерность границ кластеров в пористых поликристаллических ВТСП-материалах [Текст] / А. А. Быков [и др.] // Физ. тверд. тела : Физико-технический институт им. А.Ф.Иоффе РАН, 2012. - Т. 54 Вып. 10. - С. 1825-1828

Держатели документа:
[Bykov, A. A.
Terent'ev, K. Yu.
Gokhfeld, D. M.
Petrov, M. I.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Bykov, A. A.; Быков, Алексей Анатольевич; Terent'yev, K. Yu.; Терентьев, Константин Юрьевич; Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Petrov, M. I.; Петров, Михаил Иванович
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Ignatchenko, V. A.
Crossing resonance of stochastically interacting wave fields / V. A. Ignatchenko, D. S. Polukhin // J. Exp. Theor. Phys. - 2013. - Vol. 116, Is. 2. - P. 206-222, DOI 10.1134/S1063776113020118. - Cited References: 42. - We are grateful to V. V. Val'kov and A. F. Sadreev for useful discussions. This work was supported by the Presidium of the Russian Academy of Sciences (Program no. 24.29), the Dynasty Foundation (Program for Support of Young Scientists), the Federal Target Program (state contract no. 14.B37.21.0730), and the Special Program for Siberian Federal University of the Ministry of Education and Science of the Russian Federation. . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
CRYSTALS
   SYSTEMS
   ALLOYS
   MEDIA
Аннотация: The dynamic susceptibilities (Green's functions) of the system of two interacting wave fields of different physical natures with a stochastically inhomogeneous coupling parameter between them with zero mean value have been examined. The well-known self-consistent approximation taking into account all diagrams with noncrossing correlation/interaction lines has been generalized to the case of stochastically interacting wave fields. The analysis has been performed for spin and elastic waves. The results obtained taking into account the processes of multiple scattering of waves from inhomogeneities are significantly different from those obtained for this situation earlier in the Bourret approximation [R.C. Bourret, Nuovo Cimento 26, 1 (1962)]. Instead of frequencies degeneracy removal in the wave spectrum and the splitting of resonance peaks of dynamic susceptibilities, a wide single-mode resonance peak should be observed at the crossing point of the unperturbed dispersion curves. The fine structure appears at vertices of these wide peaks in the form of a narrow resonance on the Green's-function curve of one field and a narrow antiresonance on the vertex of the Green's-function curve of the other field.

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Публикация на русском языке Кроссинг-резонанс стохастически взаимодействующих волновых полей. - [S. l. : s. n.]

Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Polukhin, D. S.; Полухин, Дмитрий Сергеевич; Игнатченко, Вальтер Алексеевич
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Vetrov, S. Y.
Optical Tamm states at the interface between a photonic crystal and a nanocomposite with resonance dispersion / S. Y. Vetrov, R. G. Bikbaev, I. V. Timofeev // J. Exp. Theor. Phys. - 2013. - Vol. 117, Is. 6. - P. 988-998, DOI 10.1134/S1063776113140185. - Cited References: 28. - This work was supported by the Ministry of Education and Science of the Russian Federation (state contract no. 14.V37.21.0730, federal program "Human Capital for Science and Education in Innovative Russia"); by the Presidium of the Siberian Branch, Russian Academy of Sciences (project no. 24.29); by the Ministry of Education and Science of the Russian Federation (contract no. 14V37.21.0730); by the Division of Physical Sciences, Russian Academy of Sciences (project no. Sh.9.5); by the Presidium of the Russian Academy of Sciences (project nos. 24.29 and 24.31); and by the Siberian Branch, Russian Academy of Sciences (project nos. 43 and 101). . - ISSN 1063-7761. - ISSN 1090-6509

РУБ Physics, Multidisciplinary
Рубрики:
LIGHT
   TRANSMISSION
   MEDIA
   LAYER
Аннотация: Optical Tamm states localized at the edges of a photonic crystal bounded from one or both sides by a nanocomposite have been studied. The nanocomposite consists of metallic nanoinclusions, which have a spherical or orientationally ordered spheroidal shape and are dispersed in a transparent matrix, and is characterized by the resonant effective permittivity. The transmission, reflection, and absorption spectra have been calculated for waves with longitudinal and transverse polarizations in such structures at the normal incidence of light. The spectral manifestation of Tamm states that is due to the existence of negative values of the real part of the effective permittivity has been analyzed for the visible spectral range. It has been established that the characteristics of Tamm states localized at the edge of the photonic crystal depend strongly both on the concentration of nanoballs in the nanocomposite film and on its thickness. Modes formed by two coupled Tamm plasmon polaritons localized at the edges of the photonic crystal adjacent to two nanocomposite layers have been examined. It has been shown that, in the case of the anisotropic nanocomposite layer adjacent to the photonic crystal, each of two orthogonal polarizations of the incident wave corresponds to a specific frequency of the Tamm state localized at the edge; owing to this property, the transmission spectra of such a structure are polarization sensitive.

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Публикация на русском языке Ветров, Степан Яковлевич. Оптические таммовские состояния на границе фотонного кристалла и нанокомпозита c резонансной дисперсией [Текст] / С. Я. Ветров [и др.] // Журн. эксперимент. и теор. физ. - 2013. - Т. 144 Вып. 6. - С. 1129-1139

Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Bikbaev, R. G.; Timofeev, I. V.; Тимофеев, Иван Владимирович; Ministry of Education and Science of the Russian Federation [14.V37.21.0730, 14V37.21.0730]; Presidium of the Siberian Branch, Russian Academy of Sciences [24.29]; Division of Physical Sciences, Russian Academy of Sciences [Sh.9.5]; Presidium of the Russian Academy of Sciences [24.29, 24.31]; Siberian Branch, Russian Academy of Sciences [43, 101]
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Traveling of light through a 1D photonic crystal containing a defect layer with resonant dispersion / S. Y. Vetrov [et al.] // Opt. Spectrosc. - 2012. - Vol. 113, Is. 5. - P. 517-521, DOI 10.1134/S0030400X12110070. - Cited References: 14. - The work was supported by the grants NSh-7810.2010.3, RNP.2.1.1.3455, no. 27.1 and no. 3.9.1 RAS, no. 5 and no. 144 SO RAS, and g/k 02.740.11.0220 of the federal targeted program "Scientific and Pedagogical Personnel of Innovative Russia." . - ISSN 0030-400X

РУБ Optics + Spectroscopy
Рубрики:
2ND-HARMONIC GENERATION
MEDIA
MODE
Аннотация: Spectral properties of a 1D photonic crystal that is comprised of two multilayered dielectric mirrors and a nanocomposite layer between them as a structural defect are studied. The nanocomposite consists of silver nanoballs dispersed in a transparent matrix and is characterized by an effective resonant permittivity. The spectral manifestation of the defect mode splitting for the s-polarized waves is studied as a function of the angle of incidence and concentration of nanoballs. Specific features of the transmission spectra for the s- and p-polarized waves are established for the angle of incidence equal to the Brewster angle of the seeding photonic crystal. It is shown, in particular, that, in the region of the continuous transmission spectrum of the spolarized waves, there arises an additional bandgap caused by mixing of the resonant mode with photonic modes.

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Публикация на русском языке Прохождение света через одномерный фотонный кристалл с дефектным слоем с резонансной дисперсией [Текст] / С. Я. Ветров [и др.] // Оптика и спектроскопия : Наука, 2012. - Т. 113 № 5. - С. 571–575

Держатели документа:
[Vetrov, S. Ya.
Avdeeva, A. Yu.
Bikbaev, R. G.
Timofeev, I. V.] Siberian Fed Univ, Krasnoyarsk 660074, Russia
[Vetrov, S. Ya.
Timofeev, I. V.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Vetrov, S.Ya.; Ветров, Степан Яковлевич; Avdeeva, A. Y.; Bikbaev, R. G.; Timofeev, I. V.; Тимофеев, Иван Владимирович
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Vetrov, S. Ya.
Photonic defect modes in a cholesteric liquid crystal with a resonant nanocomposite layer and a twist defect / S. Y. Vetrov, M. V. Pyatnov, I. V. Timofeev // Phys. Rev. E. - 2014. - Vol. 90, Is. 3. - Ст. 32505, DOI 10.1103/PhysRevE.90.032505. - Cited References: 36. - This work was partially supported by Grants No. 43, No. 101, and No. 24.29 of SB RAS; Russian Fund of Fundamental Research Grant No. 14-02-31248; Russian Ministry of Education and Science under the Government program, Project No. 3.1276.2014/K; Grant of the President of the Russian Federation Grant No. MK-250.2013.2, and the NSCT-SB RAS joint project. . - ISSN 1539-3755. - ISSN 1550-2376

РУБ Physics, Fluids & Plasmas + Physics, Mathematical
Рубрики:
OPTICAL-PROPERTIES
   GENERATION
   MEDIA
   FILMS
Аннотация: We have studied spectral properties of a cholesteric liquid crystal with a combined defect consisting of a nanocomposite layer and a twist. The nanocomposite layer is made of metallic nanoballs dispersed in a transparent matrix and featuring effective resonant permittivity. A solution has been found for the transmission spectrum of circularly polarized waves in the structure. We have analyzed spectral splitting of the defect mode in the band gap of the cholesteric when its frequency coincides with the nanocomposite resonant frequency. Defect modes have characteristics strongly dependent on the magnitude and the sign of the phase difference of the cholesteric helix on both sides of the defect layer. It has been found that the band gap width and the position and localization degree of defect modes can be effectively controlled by external fields applied to the cholesteric.

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia
Krasnoyarsk State Med Univ, Krasnoyarsk 660022, Russia
Siberian Fed Univ, Lab Nonlinear Opt & Spect, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Pyatnov, M. V.; Пятнов, Максим Владимирович; Timofeev, I. V.; Тимофеев, Иван Владимирович; Ветров, Степан Яковлевич; SB RAS [43, 101, 24.29]; Russian Fund of Fundamental Research Grant [14-02-31248]; Russian Ministry of Education and Science under the Government program [3.1276.2014/K]; Russian Federation [MK-250.2013.2]; NSCT-SB RAS joint project
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    Arkhipkin, V. G.
    Propagation of two short pulses under conditions of electromagnetically induced transparency: adiabatic following / V. G. Arkhipkin, I. V. Timofeev // Saratov fall meeting '99: Laser physics and spectroscopy. Ser. Proceedings of the society of photo-optical instrumentation engineers (SPIE) : SPIE-Int. Soc. Optical Engineering, 2000. - Vol. 4002. - P. 45-51, DOI 10.1117/12.380132. - Cited References: 31 . - ISBN 0277-786X. - ISBN 0-8194-3627-5
Рубрики:
POPULATION TRANSFER
   LASER-PULSES
   QUANTUM
   COHERENCE
   MEDIA
   INDEX
   INTERFERENCE
   ENHANCEMENT
   TRANSITIONS
   REFRACTION
Кл.слова (ненормированные):
electromagnetically-induced transparency -- coherent population trapping -- atomic coherence -- quantum interference -- adiabatic following -- dressed field pulses
Аннотация: Spatio-temporal dynamics of two short laser pulses propagating in an absorbing medium, which consists of one-and two-photon resonant ii-atoms, is investigated in the adiabatic approximation. We give an analytical solution and compare it with numerical simulations. It is shown that pulses may propagate in a medium, whose thickness is considerably greater than the length of the linear absorption of a single weak probe wave. Finally, full transfer of the probe pulse energy into the coupling pulse takes place. A vector model of the adiabatic interaction of two pulses with three-level atom is proposed.

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Доп.точки доступа:
Timofeev, I. V.; Тимофеев, Иван Владимирович; Архипкин, Василий Григорьевич; International Workshop/Fall School Meeting for Young Scientists and Students on Optics, Laser Physics, and Biophysics (Saratov Fall Meeting 99) (1999 ; Oct. ; Saratov)
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Arkhipkin, V. G.
Temporal shape manipulation of intense light pulses by coherent population trapping / V. G. Arkhipkin, I. V. Timofeev // Phys. Rev. A. - 2006. - Vol. 73, Is. 2. - Ст. 25803, DOI 10.1103/PhysRevA.73.025803. - Cited References: 37 . - ISSN 1050-2947

РУБ Optics + Physics, Atomic, Molecular & Chemical
Рубрики:
ELECTROMAGNETICALLY INDUCED TRANSPARENCY
   NONLINEAR FREQUENCY-CONVERSION
   DOUBLE-LAMBDA SYSTEM
   LASER-PULSES
   MEDIA
   PROPAGATION
   STORAGE
Аннотация: We describe how to control the temporal shape of adiabaton using peculiarities of propagation dynamics under coherent population trapping. Temporal compression is demonstrated as a special case of pulse shaping. The general case of unequal oscillator strengths of two optical transitions in an atom is considered.

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Доп.точки доступа:
Timofeev, I. V.; Тимофеев, Иван Владимирович; Архипкин, Василий Григорьевич
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Aver'yanov, E. M.
Effective refractive index of a two-dimensional polycrystal / E. M. Aver’yanov // JETP Letters. - 2015. - Vol. 101, Is. 10. - P. 685-689, DOI 10.1134/S0021364015100033. - Cited References: 28 . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
SPECTROSCOPIC ELLIPSOMETRY
   CONJUGATED POLYMERS
   LOCAL-FIELD
   FILMS
   CONDUCTIVITY
   POLYFLUORENE
   ANISOTROPY
   DISPERSION
   MEDIA
Аннотация: A relation of the effective refractive index of a two-dimensional polycrystalline dielectric film in the transparency region to the refractive indices n1 and n2 of crystallites at the positions of axes 1 and 2, respectively, of refraction ellipsoids of the crystallites in the plane of the film has been obtained. This relation and the relation L* = (L1 + L2)/2 between the components of the Lorentz tensors for the film and crystallites have been confirmed by comparison with experimental data for conjugate-polymer films with uniaxial domains.

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Публикация на русском языке Аверьянов, Евгений Михайлович. Эффективный показатель преломления двумерного поликристалла [Текст] / Е. М. Аверьянов // Письма в Журн. эксперим. и теор. физ. : Наука, 2015. - Т. 101 Вып. 10. - С. 761-765

Доп.точки доступа:
Аверьянов, Евгений Михайлович
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10.

Ignatchenko, V. A.
Green's functions of the scalar model of electromagnetic fields in sinusoidal superlattices / V. A. Ignatchenko, D. S. Tsikalov // Physica B. - 2016. - Vol. 485. - P. 94-102, DOI 10.1016/j.physb.2016.01.006. - Cited References: 30 . - ISSN 0921-4526

РУБ Physics, Condensed Matter
Рубрики:
SCATTERING
   MEDIA
   PROPAGATION
   GRATINGS
   DENSITY
   LIGHT
Кл.слова (ненормированные):
Green's functions -- Electromagnetic waves -- Scalar model -- Sinusoidal superlattices -- Photonic crystals -- LDOS
Аннотация: Problems of obtaining Green's function and using it for studying the structure of scalar electromagnetic fields in a sinusoidal superlattice are considered. An analytical solution of equation in the k-space for Green's function is found. Green's function in the r-space is obtained by both the numerical and the approximate analytical Fourier transformation of that solution. It is shown, that from the experimental study of Green's function in the k-space the position of the plane radiation source relative to the extremes of the dielectric permittivity ?(z) can be determined. The relief map of Green's function in the r-space shows that the structure of the field takes the form of chains of islets in the plane ?z, the number of which increases with increasing the distance from a radiation source. This effect leads to different frequency dependences of Green's function at different distances from the radiation source and can be used to measure the distance to the internal source. The real component of Green's function and its spatial decay in the forbidden zones in the near field is investigated. The local density of states, depending on the position of the source in the superlattice, is calculated.

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Доп.точки доступа:
Tsikalov, D. S.; Цикалов, Денис Сергеевич; Игнатченко, Вальтер Алексеевич
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