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1.
Bulgakov, E. N.
Channel dropping via
bound
states in the continuum in a system of two nonlinear cavities between two linear waveguides / E. N. Bulgakov, K. N. Pichugin, A. F. Sadreev> // J. Phys.: Condens. Matter. - 2013. -
Vol. 25
,
No. 39
. - Ст. 395304. - P. ,
DOI
10.1088/0953-8984/25/39/395304 . - ISSN 0953-8984
Перевод заглавия:
Переключение каналов через связанные состояния в континууме в системе
Кл.слова (ненормированные):
Channel dropping
--
Efficient channels
--
Incident waves
--
Linear waveguides
--
Nonlinear cavities
--
Numerical solution
--
Parallel waveguides
--
Two-dimensional photonic crystals
--
Condensed matter physics
--
Physics
--
Waveguides
Аннотация:
We show that two nonlinear resonant cavities aligned between two parallel waveguides can support self-induced
bound
states in the continuum (BSCs). These BSCs are symmetrical relative to an inversion of the waveguides and to inversion of the transport axis. Due to this BSCs can drop an incident wave from one waveguide to another with very high efficiency. We show also that the frequency of the efficient channel dropping can be tuned by injecting power. All these results are in good agreement with numerical solutions of the Maxwell equations in a two-dimensional photonic crystal of GaAs rods holding two parallel waveguides and two defects made of a Kerr medium. В© 2013 IOP Publishing Ltd.
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Доп.точки доступа:
Pichugin, K. N.; Пичугин, Константин Николаевич; Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич
}
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2.
Mironov, V. L.
Multirelaxation generalized refractive mixing dielectric model of moist soils / V. L. Mironov, P. P. Bobrov, S. V. Fomin> // IEEE Geosc. Remote Sens. Letters. - 2013. -
Vol. 10
,
Is. 3
. - Ст. 6332477. - P. 603-606,
DOI
10.1109/LGRS.2012.2215574 . - ISSN 1545-598X
Перевод заглавия:
Многорелаксационная обобщенная рефракционная диэлектрическая модель влажных почв
Кл.слова (ненормированные):
Bound
soil water
--
dielectric model
--
dielectric relaxations
--
dielectric spectra
--
free soil water
--
moist soil
--
Bound
waters
--
Complex dielectric constant
--
Debye relaxation
--
Dielectric models
--
Dielectric spectra
--
Dipole relaxation
--
Frequency ranges
--
Gigahertz frequencies
--
Gigahertz range
--
Moist soil
--
Soil water
--
Spectroscopic parameters
--
Water molecule
--
Dielectric relaxation
--
Mixing
--
Molecules
--
Soil moisture
--
Geologic models
Аннотация:
In this letter, a multirelaxation generalized refractive mixing dielectric model (GRMDM) for moist soil is proposed and substantiated in the frequency range from 0.04 to 26.5 GHz. This model is based on the methodology of a single-relaxation GRMDM which accounts only for the dipole relaxation of water molecules in the gigahertz frequency range. The proposed multirelaxation GRMDM takes into account both the dipole (Debye) and ionic (Maxwell-Wagner) relaxations of soil water molecules. For this purpose, it uses a two-frequency Debye relaxation equation for the dielectric spectra of
bound
water. The spectroscopic parameters of the multirelaxation GRMDM were derived by fitting the spectra calculated by this model to the respective measured ones. The main advantage of this model is that it predicts the complex dielectric constant of moist soils throughout the megahertz and gigahertz frequency ranges with the same error as the single-relaxation GRMDM does only in the gigahertz range.
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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
Omsk State Pedag Univ, Omsk 644099, Russia
Доп.точки доступа:
Bobrov, P. P.; Fomin, S. V.; Фомин, Сергей Викторович; Миронов, Валерий Леонидович
}
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3.
Mironov, V. L.
Dielectric model of moist soils with varying clay content in the 0.04 to 26.5 GHz frequency range / V. L. Mironov, P. P. Bobrov, S. V. Fomin> // Int. Sib. Conf. on Control and Communicat. : Proc. - 2013. - Ст. 6693613,
DOI
10.1109/SIBCON.2013.6693613. - This work was supported by the Program of the Siberian Branch of the Russian Academy of Sciences, 2013-2016. Project II.12.1.1. . - ISSN 978-1-479. - ISSN 978-14799
Кл.слова (ненормированные):
moist soil
--
dielectric model
--
dielectric spectra
--
dielectric relaxations
--
bound
soil water
--
free soil water
Аннотация:
In this paper, a soil texture dependent multirelaxation generalized refractive mixing dielectric model (MR GRMDM) for moist soils was developed. The model provides for complex permittivity of moist soils in both the gigahertz and megahertz frequency ranges, namely, from 40 MHz to 26.5 GHz.
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Доп.точки доступа:
Bobrov, P. P.; Fomin, S. V.; Фомин, Сергей Викторович; Миронов, Валерий Леонидович; International Siberian Conference on Control and Communications(10 ; 2013 ; Sept. 12-13 ; Krasnoyarsk)
}
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4.
Bulgakov, E. N.
Robust
bound
state in the continuum in a nonlinear microcavity embedded in a photonic crystal waveguide [Text] / E. N. Bulgakov, A. F. Sadreev> // Opt. Lett. - 2014. -
Vol. 39
,
Is. 17
. - P. 5212-5215,
DOI
10.1364/OL.39.005212. - Cited References: 27. - The work was supported by the Russian Science Foundation, grant 14-12-00266. We acknowledge discussions with Chia Wei Hsu and D. N. Maksimov. . - ISSN 0146-9592. - ISSN 1539-4794
Перевод заглавия:
Устойчивые связанные состояния в континууме в нелинейном микрорезонаторе, помещенного в фотонно кристаллический волновод
РУБ
Optics
Рубрики:
TRAPPED MODES
RESONANCES
Аннотация:
We present a two-dimensional photonic crystal design of four defect dielectric rods, which form a microcavity with eigenfrequencies residing in the propagating band of a directional waveguide. In this system, a nonrobust
bound
state in the continuum (BSC) occurs as a result of full destructive interference of the monopole and quadrupole modes, with the same parity at certain values of the material parameters of the defect rods. Due to the Kerr effect, a robust BSC arises in a self-adaptive way without necessity to tune the material parameters. The absence of the superposition principle in that nonlinear system gives rise to coupling of the BSC with injected light, resulting in a novel transmission resonance. (C) 2014 Optical Society of America
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Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич; Russian Science Foundation [14-12-00266]
}
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5.
Bulgakov, E. N.
Bloch
bound
states in the radiation continuum in a periodic array of dielectric rods / E. N. Bulgakov, A. F. Sadreev> // Phys. Rev. A. - 2014. -
Vol. 90
,
Is. 5
. - Ст. 53801,
DOI
10.1103/PhysRevA.90.053801. - Cited References: 35. - The work was supported by the Russian Science Foundation through Grant No. 14-12-00266. We acknowledge discussions with D. N. Maksimov. . - ISSN 1050-2947. - ISSN 1094-1622
Перевод заглавия:
Блоховские связанные состояния в радиационном континууме в периодической цепи диэлеткрических стержней
РУБ
Optics + Physics, Atomic, Molecular & Chemical
Рубрики:
WAVE-GUIDE
SCATTERING
CYLINDERS
CHANNEL
Аннотация:
We consider an infinite periodic array of dielectric rods in vacuum with the aim to demonstrate three types of Bloch
bound
states in the continuum (BSCs): symmetry protected with a zero Bloch vector, embedded in one diffraction channel with nonzero Bloch vector, and embedded in two and three diffraction channels. The first and second types of the BSC exist for a wide range of material parameters of the rods, while the third occurs only at a specific value of the radius of the rods. We show that the second type supports the power flux along the array. In order to find BSCs we put forward an approach based on the expansion over the Hankel functions. We show how the BSC reveals itself in the scattering function when the singular BSC point is approached along a specific path in the parametric space.
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Доп.точки доступа:
Sadreev, E. N.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич; Russian Science Foundation [14-12-00266]
}
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6.
Sadreev, A. F.
Bound
states in the continuum in zigzag quantum wire enforced by a finger gate / A. F. Sadreev, A. S. Pilipchuk> // JETP Letters. - 2015. -
Vol. 100
,
Is. 9
. - P. 585-590,
DOI
10.1134/S0021364014210139. - Cited References:41. - This work was supported by the Russian Foundation for Basic Research(project no. 14-12-00266). . - ISSN 0021. - ISSN 1090-6487. -
РУБ
Physics, Multidisciplinary
Рубрики:
WAVE-GUIDE
DOUBLE-BEND
SYSTEMS
TRANSMISSION
RESONANCES
ELECTRON
Аннотация:
We consider electron transport in a zigzag quantum wire by the effect of finger gate potential. Using a non-Hermitian effective Hamiltonian, we calculate resonance positions and widths to show that the resonance widths are easily governed by the gate potential. In particular, the resonance width can be enforced to be equal to zero, which leads to an electron localization with the Fermi energy embedded in the propagation band of the wire, i.e., the
bound
state in the continuum (BSC). We show that, for positive values of the potential, a zigzag wire becomes a Fabry-Perot resonator to give rise to BSC too.
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Публикация на русском языке
Садреев, Алмаз Фаттахович. Связанные состояния в континууме, инициированные потенциалом электрода в зигзагообразной квантовой проволоке [Текст] / А. Ф. Садреев, А. C. Пилипчук // Письма в Журн. эксперим. и теор. физ. - 2014. - Т. 100 Вып. 9-10. - С. 664– 669
Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660080, Russia.
Доп.точки доступа:
Pilipchuk, A. S.; Пилипчук, Артем Сергеевич; Садреев, Алмаз Фаттахович; Russian Foundation for Basic Research [14-12-00266]
}
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7.
Maksimov, D. N.
Wannier-Stark states in double-periodic lattices. I. One-dimensional lattices / D. N. Maksimov, E. N. Bulgakov, A. R. Kolovsky> // Phys. Rev. A. - 2015. -
Vol. 91
,
Is. 5
. - Ст. 053631,
DOI
10.1103/PhysRevA.91.053631. - Cited References:24. - The authors acknowledge financial support from Russian Foundation for Basic Research through the Project No. 15-02-00463, Wannier-Stark states and Bloch oscillations of a quantum particle in a generic two-dimensional lattice. . - ISSN 1050. - ISSN 1094-1622
Перевод заглавия:
Состояния Ванье-Штарка в альтернантных решётках. 1. Одномерные решётки
РУБ
Optics + Physics, Atomic, Molecular & Chemical
Рубрики:
BLOCH-ZENER OSCILLATIONS
TIGHTLY
BOUND
ELECTRONS
BANDS
FIELD
Аннотация:
We analyze the Wannier-Stark spectrum of a quantum particle in generic one-dimensional double-periodic lattices. In the limit of a weak static field, the spectrum is shown to be a superposition of two Wannier-Stark ladders originating from two Bloch subbands. As the strength of the field is increased, the spectrum rearranges itself into a single Wannier-Stark ladder. We derive analytical expressions that describe the rearrangement employing the analogy between the Wannier-Stark problem and a driven two-level system in the strong-coupling regime.
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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Доп.точки доступа:
Bulgakov, E. N.; Булгаков, Евгений Николаевич; Kolovsky, A. R.; Коловский, Андрей Радиевич; Максимов, Дмитрий Николаевич; Russian Foundation for Basic Research [15-02-00463]
}
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8.
Sadreev, A. F.
Gate controlled resonant widths in double-bend waveguides:
bound
states in the continuum / A. F. Sadreev, D. N. Maksimov, A. S. Pilipchuk> // J. Phys.: Condens. Matter. - 2015. -
Vol. 27
,
Is. 29
. - Ст. 295303,
DOI
10.1088/0953-8984/27/29/295303. - Cited References:52. - This work is supported by the Russian Science Foundation through Grant No. 14-12-00266. AS is grateful K-F Berggren for discussions. . - ISSN 0953. - ISSN 1361-648X
Перевод заглавия:
Управление резонансными ширинами в двух-коленных волноводах: связанные состояния в континууме
РУБ
Physics, Condensed Matter
Рубрики:
CIRCULAR BENDS
NUCLEAR REACTIONS
FANO RESONANCES
UNIFIED THEORY
QUANTUM
TRANSMISSION
TRANSPORT
SYSTEMS
Кл.слова (ненормированные):
double-bent waveguide
--
effective non-Hermittian Hamiltonian
--
bound
--
states in the continuum
Аннотация:
We consider quantum transmission through double-bend Pi- and Z-shaped waveguides controlled by the finger gate potential. Using the effective non-Hermitian Hamiltonian approach we explain the resonances in transmission. We show a difference in transmission in the short waveguides that is the result of different chirality in Z and Pi waveguides. We demonstrate that the potential selectively affects the resonant widths resulting in the occurrence of
bound
states in the continuum.
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Держатели документа:
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660080, Russia.
Доп.точки доступа:
Maksimov, D. N.; Максимов, Дмитрий Николаевич; Pilipchuk, A. S.; Пилипчук, Артем Сергеевич; Садреев, Алмаз Фаттахович; Russian Science Foundation [14-12-00266]
}
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9.
Pichugin, K. N.
Frequency comb generation by symmetry-protected
bound
state in the continuum / K. N. Pichugin, A. F. Sadreev> // J. Opt. Soc. Am. B. - 2015. -
Vol. 32
,
Is. 8
. - P. 1630-1636,
DOI
10.1364/JOSAB.32.001630. - Cited References:48. - Russian Foundation for Basic Research (RFBR) (03-02-00497). . - ISSN 0740. - ISSN 1520-8540
Перевод заглавия:
Генерация частотной гребенки при помощи связанного состояния в континууме
РУБ
Optics
Рубрики:
RADIATION CONTINUUM
DIMER
MICRORESONATOR
EVOLUTION
CAVITIES
BREAKING
EQUATION
Аннотация:
We study the dynamical response of two nonlinear microresonators coupled with a photonic crystal waveguide. We find a domain in the space of frequency and amplitude of the probing light where all stationary solutions are unstable. In this domain, scattered light carries multiple harmonics with equidistantly spaced frequencies [frequency comb (FC) effect]. Two identical resonators coupled with the waveguide support the symmetry-protected
bound
state in the continuum whose response is singular, as the amplitude of the injected wave tends to zero. As a result, the FC interval tends to zero when the amplitude of probing light diminishes, which paves the way for all-optical generation of waves with ultralow frequency. (C) 2015 Optical Society of America
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Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Пичугин, Константин Николаевич; Russian Foundation for Basic Research (RFBR) [03-02-00497]
}
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10.
Bulgakov, E. N.
Light trapping above the light cone in a one-dimensional array of dielectric spheres / E. N. Bulgakov, A. F. Sadreev> // Phys. Rev. A. - 2015. -
Vol. 92
,
Is. 2
. - Ст. 023816,
DOI
10.1103/PhysRevA.92.023816. - Cited References:62. - The work was supported by the Russian Science Foundation through Grant No. 14-12-00266. We acknowledge discussions with D. N. Maksimov. . - ISSN 1050. - ISSN 1094-1622
Перевод заглавия:
Захват света выше светового конуса в одномерной цепочке диэлектрических сфер
РУБ
Optics + Physics, Atomic, Molecular & Chemical
Рубрики:
CLASSICAL ELECTROMAGNETIC SCATTERING
ENERGY PHOTON DIFFRACTION
BLOCH SURFACE-WAVES
RADIATION CONTINUUM
MULTIPLE-SCATTERING
CONSUMMATE SOLUTION
LINEAR ARRAYS
BOUND
-STATES
MODES
GUIDES
Аннотация:
We demonstrate
bound
states in the first TE and TM diffraction continua (BSC) in a linear periodic array of dielectric spheres in air above the light cone. We classify the BSCs according to the symmetry specified by the azimuthal number m, the Bloch wave vector β directed along the array, and polarization. The most simple symmetry-protected TE and TM polarized BSCs have m=0 and β=0 and occur in a wide range of the radii of the spheres and dielectric constants. More complicated BSCs with m≠0 and β=0 exist only for a selected radius of the spheres at a fixed dielectric constant. We also find robust Bloch BSCs with β≠0 and m=0. We present also the BSCs embedded into two and three diffraction continua. We show that the BSCs can be easily detected by the collapse of the Fano resonance for scattering of electromagnetic plane waves by the array.
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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia.
Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia.
Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич; Russian Science Foundation [14-12-00266]
}
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11.
Bound
states in
the continuum in open acoustic resonators / A. A. Lyapina [et al.]> // J. Fluid Mech. - 2015. -
Vol. 780
. - P. 370-387,
DOI
10.1017/jfm.2015.480. - Cited References: 48. - This work has been supported by Russian Science Foundation through grant 14-12-00266. . - ISSN 0022-1120
Перевод заглавия:
Связанное состояние в континууме в открытом акустическом резонаторе
РУБ
Mechanics + Physics, Fluids & Plasmas
Рубрики:
TRAPPED MODES
FANO RESONANCES
COMPLEX RESONANCES
PARALLEL PLATES
SIDE-BRANCHES
WAVE-GUIDES
ABSORPTION
TRANSPORT
CHANNELS
SYSTEM
Кл.слова (ненормированные):
aeroacoustics
--
noise control
--
wave scattering
Аннотация:
We consider
bound
states in the continuum (BSCs) or embedded trapped modes in two- and three-dimensional acoustic axisymmetric duct-cavity structures. We demonstrate numerically that, under variation of the length of the cavity, multiple BSCs occur due to the Friedrich-Wintgen two-mode full destructive interference mechanism. The BSCs are detected by tracing the resonant widths to the points of the collapse of Fano resonances where one of the two resonant modes acquires infinite life-time. It is shown that the approach of the acoustic coupled mode theory cast in the truncated form of a two-mode approximation allows us to analytically predict the BSC frequencies and shape functions to a good accuracy in both two and three dimensions. © 2015 Cambridge University Press.
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Держатели документа:
L.V. Kirensky Institute of Physics, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Lyapina, A. A.; Ляпина, Алина Андреевна; Maksimov, D. N.; Максимов, Дмитрий Николаевич; Pilipchuk, A. S.; Пилипчук, Артем Сергеевич; Sadreev, A. F.; Садреев, Алмаз Фаттахович
}
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12.
Val'kov, V. V.
Andreev
bound
states and the Josephson current through a spin dimeric structur / V. V. Val'kov, S. V. Aksenov> //
Spin Waves 2015, Int. Symp. : abstracts. - СПб., 2015. - P. 126
Перевод заглавия:
Андреевские связанные состояния и джозефсоновский ток через спин-димерную структуру
Материалы конференции
Доп.точки доступа:
Aksenov, S. V.; Аксенов, Сергей Владимирович; Вальков, Валерий Владимирович; "Spin Waves", International Simposium(2015 ; Jun. ; 7-13 ; Saint Petersburg); Физико-технический институт им. А.Ф. Иоффе РАН
}
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13.
Bulgakov, E. N.
All-optical light storage in
bound
states in the continuum and release by demand / E. N. Bulgakov, K. N. Pichugin, A. F. Sadreev> // Opt. Express. - 2015. -
Vol. 23
,
Is. 17
. - P. 22520-22531,
DOI
10.1364/OE.23.022520. - Cited References: 45. - This work was supported by Russian Scientific Foundation through Grant 14-12-00266. We acknowledge discussions with D.N. Maksimov . - ISSN 1094-4087
Перевод заглавия:
Сохранение света в связанном состоянии в континууме и освобождение по требованию
РУБ
Optics
Рубрики:
TRAPPED RAINBOW STORAGE
COUPLED-MODE THEORY
CRYSTAL WAVE-GUIDE
SLOW LIGHT
FANO RESONANCE
METAMATERIALS
MICROCAVITY
CAVITIES
Аннотация:
In the framework of the temporal coupled mode theory we consider
bound
states embedded in the continuum (BSC) of photonic crystal waveguide as a capacity for light storage. A symmetry protected BSC occurs in two off-channel microresonators positioned symmetrically relative to the waveguide. We demonstrate that the symmetry protected BSC captures a fraction of a light pulse due to the Kerr effect as the pulse passes by the microresonators. However the amount of captured light is found to be strongly sensitive to the parameters of the gaussian light pulse such as basic frequency, duration and intensity. In contrast to the above case the BSC resulted from a full destructive interference of two eigenmodes of a single microresonator accumulates a fixed amount of light dependent on the material parameters of the microresonator but independent of the light pulse. The BSCs in the Fabry-Perot resonator show similar effects. We also show that the accumulated light can be released by a secondary pulse. These phenomena pave a way for all-optical storage and release of light. (C) 2015 Optical Society of America
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Доп.точки доступа:
Pichugin, K. N.; Пичугин, Константин Николаевич; Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич; Russian Scientific Foundation [14-12-00266]
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14.
Bulgakov, E. N.
Formation of
bound
states in the continuum for a quantum dot with variable width / E. . Bulgakov, A. . Sadreev> // Phys. Rev. B. - 2011. -
Vol. 83
,
Is. 23
. - Ст. 235321,
DOI
10.1103/PhysRevB.83.235321. - Cited References: 61 . - ISSN 1098-0121
РУБ
Physics, Condensed Matter
Рубрики:
NUCLEAR REACTIONS
RADIATION-FIELD
UNIFIED THEORY
WAVE-GUIDE
TRANSMISSION
SCATTERING
BILLIARDS
ELECTRON
Аннотация:
We consider mechanisms of formation of the
bound
states in the continuum in open rectangular quantum dots with variable width. Because of symmetry there might be
bound
states in the continuum (BSCs) embedded into one, two, and three continua because of the symmetry of system. These BSCs arise for selected values of the width. We show numerically that the BSCs can be excited for transmission of wave packets if the quantum dot width is varied in time and reaches these selected values of dot width. Moreover, we consider numerically a decay process of different eigenstates in the closed quantum dot to show that some of them trap in the BSC after the quantum dot is opened.
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Держатели документа:
[Bulgakov, Evgeny
Sadreev, Almas] LV Kirenskii Inst Phys, RU-660036 Krasnoyarsk, Russia
[Bulgakov, Evgeny] Siberian State Aerosp Univ, Krasnoyarsk, Russia
ИФ СО РАН
Kirensky Institute of Physics, RU-660036, Krasnoyarsk, Russian Federation
Siberian State Aerospace University, Krasnoyarsk Rabochii, 31, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич
}
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15.
Bulgakov, E. N.
Bound
states in photonic Fabry-Perot resonator with nonlinear off-channel defects / E. N. Bulgakov, A. F. Sadreev> // Phys. Rev. B. - 2010. -
Vol. 81
,
Is. 11
. - Ст. 115128,
DOI
10.1103/PhysRevB.81.115128. - Cited References: 73. - The work was partially supported by RFBR under Grant No. 09-02-98005 "Siberia." We are greatly acknowledge Konstantin Pichugin for many discussions. . - ISSN 1098-0121
РУБ
Physics, Condensed Matter
Рубрики:
CRYSTAL WAVE-GUIDES
STATIONARY LOCALIZED STATES
COUPLED-MODE THEORY
OPTICAL RESONATORS
NUCLEAR REACTIONS
UNIFIED THEORY
MICROCAVITIES
TRANSMISSION
CONTINUUM
CIRCUITS
Аннотация:
We consider a Fabry-Perot resonator (FPR) comprised of two off-channel nonlinear defects coupled to the photonic waveguide. For the linear case FPR can support
bound
states in the form of standing waves between the defects if a distance between them is quantized. For the nonlinear case the
bound
states appear for arbitrary distance between the defects if electromagnetic intensity is quantized. For transmission through the FPR we reveal additional resonances which are the result of coupling of incident wave with the
bound
states because of nonlinearity of the defects. The resonances are spaced at the eigenfrequencies of
bound
states with a width proportional to the input amplitude. The theory of the FPR based on the simple Wang and Fan model [Phys. Rev. E 68, 066616 (2003)] is complemented by the tight-binding one. The results for the transmission and
bound
states in these models agree with computations in real two-dimensional photonic crystal waveguide coupled with two off-channel defects fabricated from a Kerr-type material.
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Держатели документа:
[Bulgakov, Evgeny N.
Sadreev, Almas F.] Russian Acad Sci, Inst Phys, Krasnoyarsk 660036, Russia
[Bulgakov, Evgeny N.] Siberian State Aerosp Univ, Krasnoyarsk, Russia
ИФ СО РАН
Institute of Physics, Academy of Sciences, 660036 Krasnoyarsk, Russian Federation
Siberian State Aerospace University, Krasnoyarsk Rabochii, 31, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич
}
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16.
Sadreev, A. F.
Two-Electron
Bound
States in a Continuum in Quantum Dots / A. F. Sadreev, T. V. Babushkina> // JETP Letters. - 2008. -
Vol. 88
,
Is. 5
. - P. 312-317,
DOI
10.1134/S0021364008170050. - Cited References: 30 . - ISSN 0021-3640
РУБ
Physics, Multidisciplinary
Рубрики:
LOCALIZED MAGNETIC STATES
METALS
Аннотация:
A
bound
state in a continuum (BIC) might appear in open quantum dots for the variation in the dot's shape. By means of the equations of motion of the Green's functions, we investigate the effect of strong intradot Coulomb interactions on that phenomenon within the framework of(he impurity Anderson model. The equation that the imaginary part of the poles of the Green's function equals zero yields the condition for BICs. As a result, we show that the Coulomb interactions replicate the single-electron BICs into two-electron ones.
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Держатели документа:
[Sadreev, A. F.] Russian Acad Sci, Inst Phys, Krasnoyarsk 660036, Russia
[Babushkina, T. V.] Siberian Fed Univ, Krasnoyarsk 660079, Russia
ИФ СО РАН
Institute of Physics, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660079, Russian Federation
Доп.точки доступа:
Babushkina, T. V.; Садреев, Алмаз Фаттахович
}
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17.
Bulgakov, E. N.
Bound
states in the continuum in photonic waveguides inspired by defects / E. N. Bulgakov, A. F. Sadreev> // Phys. Rev. B. - 2008. -
Vol. 78
,
Is. 7
. - Ст. 75105,
DOI
10.1103/PhysRevB.78.075105. - Cited References: 53 . - ISSN 1098-0121
РУБ
Physics, Condensed Matter
Рубрики:
SCATTERING-THEORY
NUCLEAR REACTIONS
UNIFIED THEORY
TRANSMISSION
ELECTRON
MODEL
Аннотация:
Photonic crystal with defect layer forms directed continuum for electromagnetic waves. Defect rods in the vicinity of the defect layer interact with the continuum and give rise to scattering of ingoing waves. We derive quantum-mechanical analog of the non-Hermitian Hamiltonian of the open system with complex eigenvalues, which describes a scattering of electromagnetic waves by the defect rods. In this formalism a
bound
state in the continuum (BIC) can be easily found by the condition that one of the complex eigenvalues becomes real for variation of dielectric constant of the defect rods. We numerically find BICs with discrete frequencies belong to the continuum for different arrangements of the defects and show that they are localized around the defects.
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Держатели документа:
[Bulgakov, Evgeny N.
Sadreev, Almas F.] Russian Acad Sci, Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН
Institute of Physics, Academy of Sciences, 660036 Krasnoyarsk, Russian Federation
Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич
}
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18.
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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19.
Bulgakov, E. N.
The effect of
bound
states in microwave waveguides on electromagnetic wave propagation / E. N. Bulgakov, A. F. Sadreev> // Tech. Phys. - 2001. -
Vol. 46
,
Is. 10
. - P. 1281-1290,
DOI
10.1134/1.1412064. - Cited References: 15 . - ISSN 1063-7842
РУБ
Physics, Applied
Рубрики:
RADIATION-FIELD
HALL RESISTANCE
QUANTUM WIRES
GUIDES
Аннотация:
The transmission of a TE microwave field with a frequency omega through Gamma, T, and X waveguide junctions filled with a ferromagnetic is considered. These junctions are known to have
bound
states with below-cutoff frequencies. A probing microwave radiation with a frequency Omega applied to the scattering region generates magnetic oscillations with frequencies omega + n Omega (where n = 0, +/-1, +/-2, ...), which resonantly combine with the
bound
waveguide states. This effect provides for a new method of studying
bound
waveguide states and efficiently controlling the transmission of microwave radiation. (C) 2001 MAIK "Nauka/Interperiodica".
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Держатели документа:
Russian Acad Sci, Inst Phys, Siberian Div, Krasnoyarsk 660036, Russia
Linkoping Univ, Dept Phys & Measurement Technol, S-58183 Linkoping, Sweden
ИФ СО РАН
Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Dept. of Phys. and Msrmt. Technology, Linkoping University, S-581 83 Linkoping, Sweden
Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич
}
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20.
Bulgakov, E. N.
Mixing of
bound
states with electron transport by a radiation field in waveguides / E. N. Bulgakov, A. F. Sadreev> // J. Exp. Theor. Phys. - 1998. -
Vol. 87
,
Is. 6
. - P. 1058-1067,
DOI
10.1134/1.558621. - Cited References: 27 . - ISSN 1063-7761
РУБ
Physics, Multidisciplinary
Рубрики:
CLASSICALLY UNBOUND SYSTEM
HALL RESISTANCE ANOMALIES
QUANTUM WAVE-GUIDES
POINT CONTACTS
WIRES
TIME
CONDUCTANCE
Аннотация:
Electron transmission in the two-, three-, and four-terminal nanostructures is considered under the influence of a radiation field. The frequency of the radiation field is tuned to the transition between the energy of a
bound
state and the Fermi energy of the incident electrons. The radiation induced resonant peaks and dips of the electron transport are exhibited for zero and low magnetic fields. It is shown that rotation of the radiation field polarization can effectively control the electron transport into different electrodes attached to the structures because of the symmetry of the structures. The resonant anomalies of the Hall resistance are found in a weak magnetic field. (C) 1998 American Institute of Physics. [S1063-7761(98)00412-0].
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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Abo Akad Univ, Inst Fys, Dept Phys, SF-20500 Abo, Finland
ИФ СО РАН
Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич
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