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1.
Belyaev, B. A.
An X-band magnetically tunable bandpass filter based on novel waveguide cavity resonator / B. A. Belayev, K. V. Lemberg, A. M. Serzhantov> //
Asia-Pacific Microwave Conference Proceedings, APMC 2016 : Institute of Electrical and Electronics Engineers Inc., 2017,
DOI
10.1109/APMC.2016.7931355. - Cited References: 12
Кл.слова (ненормированные):
Bandpass filters
--
Cavity resonators
--
Waveguides
--
Operating modes
--
Relative bandwidth
--
Tunable band-pass filters
--
Tunable frequency
--
Tunable wave-guides
--
Two-pole filters
--
Unloaded quality factors
--
Waveguide cavity resonators
--
Waveguide filters
Аннотация:
This paper presents a ferrite tunable waveguide filter showing high Qu and high tunability in X-band. A new type of waveguide cavity resonator with an H102 operating mode was proposed for the creation of a low-loss, two-pole filter. The filter results in an insertion loss of 3.6-4.1 dB over the tuning range 8.74-9.63 GHz with a relative bandwidth of 0.92-0.79% and biasing magnetic field 0-600 Oe. This design demonstrates an unloaded quality factor of 380-396 over the tunable frequency range. © 2016 IEEE.
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Доп.точки доступа:
Lemberg, K. V.; Serzhantov, A. M.; Сержантов, Алексей Михайлович; Беляев, Борис Афанасьевич; Asia-Pacific Microwave Conference(2016 ; Dec. ; New Delhi)
}
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2.
Bulgakov, E. N.
All-optical manipulation of light in X- and T-shaped photonic crystal
waveguides
with a nonlinear dipole defect / E. N. Bulgakov, A. F. Sadreev> // Phys. Rev. B. - 2012. -
Vol. 86
,
Is. 7
. - Ст. 75125,
DOI
10.1103/PhysRevB.86.075125. - Cited References: 38. - The work is partially supported by Integration Project of Siberian Branch of RAS (Project No. 29) and RFBR Grant No. 12-02-000094. We thank D. N. Maksimov for critical reading of the manuscript. . - ISSN 1098-0121
РУБ
Physics, Condensed Matter
Рубрики:
SPONTANEOUS SYMMETRY-BREAKING
FIBER
CAVITIES
SYSTEM
FIELDS
Аннотация:
We consider light transmission in X- and T-shaped photonic crystal
waveguides
which hold nonlinear defect with two resonant dipole modes. By use of the coupled-mode theory and by numerical solution of the Maxwell equations for the transverse-magnetic (TM) light mode, we show two stable types of the solutions. The first type has no cross talk, while the second type does owe to nonlinearity of the defect. We show also that direct path transmission processes in the
waveguides
play an important role for breaking of symmetry.
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Держатели документа:
[Bulgakov, Evgeny N.
Sadreev, Almas F.] LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
[Bulgakov, Evgeny N.] Siberian State Aerosp Univ, Krasnoyarsk, Russia
Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич
}
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3.
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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4.
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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5.
Bulgakov, E. N.
Light induced Josephson like current between two coupled nonlinear cavities coupled with a symmetrically positioned photonic crystal waveguide / E. . Bulgakov, K. . Pichugin, A. . Sadreev> // J. Phys.: Condens. Matter. - 2011. -
Vol. 23
,
Is. 6
. - Ст. 65304,
DOI
10.1088/0953-8984/23/6/065304. - Cited References: 26. - The work was supported by RFBR-grant 09-02-98005-'Siberia' and by RFBR-grant 11-02-00289. . - ISSN 0953-8984
РУБ
Physics, Condensed Matter
Рубрики:
LOCALIZED MODES
BREAKING
CIRCUITS
Кл.слова (ненормированные):
Complex amplitude
--
Green function theory
--
Josephson
--
Kerr materials
--
Light intensity
--
Nonlinear cavities
--
Optical cavities
--
Photonic crystal waveguide
--
Optical
waveguides
--
Photonic crystals
--
Transparency
--
Waveguides
--
Light transmission
Аннотация:
We consider light transmission in a photonic crystal waveguide coupled with two identical nonlinear cavities positioned symmetrically beside the waveguide and coupled with each other. Using Green function theory we show three scenarios for the transmission. The first one inherits the linear case in which the light transmission preserves the symmetry. In the second scenario the symmetry is broken by the light intensities at the cavities. In the third scenario the intensities are equal but the phases of the complex amplitudes are different at the cavities. This results in a Josephson like current between the cavities. The model consideration agrees well with computations of the Poynting current in a photonic crystal waveguide coupled with two optical cavities filled with a Kerr material.
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Держатели документа:
[Bulgakov, Evgeny
Pichugin, Konstantin
Sadreev, Almas] Kirensky Inst Phys, Krasnoyarsk 660036, Russia
[Bulgakov, Evgeny] Siberian State Aerosp Univ, Krasnoyarsk, Russia
ИФ СО РАН
Kirensky Institute of Physics, 660036, Krasnoyarsk, Russian Federation
Siberian State Aerospace University, Krasnoyarsk Rabochii, 31, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Pichugin, K. N.; Пичугин, Константин Николаевич; Sadreev, A. F.; Садреев, Алмаз Фаттахович
}
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6.
Bulgakov, E. N.
Light-induced degeneracy of resonance modes in a nonlinear microcavity coupled with
waveguides
: Application to channel drop filter / E. N. Bulgakov, A. F. Sadreev> // J. Opt. Soc. Am. B. - 2013. -
Vol. 30
,
Is. 9
. - P. 2549-2554,
DOI
10.1364/JOSAB.30.002549 . - ISSN 0740-3224
Перевод заглавия:
Свето-индуцированное восстановления вырождения в нелинейном микрорезонаторе, связанного с волноводами: приложение к переключателю каналов
Кл.слова (ненормированные):
Channel drop filters
--
Channel dropping
--
Eigen modes
--
Injected power
--
Light-induced
--
Parallel
waveguides
--
Resonance mode
--
Two-dimensional photonic crystals
--
Microcavities
--
Natural frequencies
--
Waveguides
--
Waveguide filters
Аннотация:
We consider a microcavity with degenerate dipole or hexapole eigenmodes. If the cavity is positioned between
waveguides
, degeneracy is lifted. However, we show that in a nonlinear microcavity the degeneracy is recovered at certain injected power. In application we consider a two-dimensional photonic crystal of GaAs rods holding two parallel
waveguides
and one defect made of Kerr media. We show that 100% efficiency channel dropping can be attained without a necessity to tune the resonant frequencies of the microcavity. В© 2013 Optical Society of America.
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Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич
}
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7.
Bulgakov, E. N.
Ligth-induced breaking of symmetry in photonic crystal
waveguides
with nonlinear defects as a key for all-optical switching circuits / E. N. Bulgakov, A. F. Sadreev, K. N. Pichugin> //
Spontaneous symmetry breaking, self-trapping, and Josephson oscillations. - 2013. - P. 89-124. - (Progress in optical science and photonics ; Vol. 1),
DOI
10.1007/10091_2011_1 . - ISSN 978-3-642
Аннотация:
We consider light transmission in 2D photonic crystal waveguide coupled with two identical nonlinear defects positioned symmetrically aside the waveguide. We show that with growth of injected light power there is a breaking of symmetry by two ways. In the first way the symmetry is broken because of different light intensities at the defects. In the second way the intensities at the defects are equaled 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. As application of these phenomena we consider the symmetry breaking for the light transmission in a T-shaped photonic waveguide with two nonlinear defects. We demonstrate as this phenomenon can be explored for all-optical switching of light transmission from the left output waveguide to the right one by application of input pulses. Finally we consider the symmetry breaking in the waveguide coupled with single defect presented however by two dipole modes.
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Доп.точки доступа:
Malomed, Boris A. \ed.\; Sadreev, A. F.; Садреев, Алмаз Фаттахович; Pichugin, K. N.; Пичугин, Константин Николаевич; Булгаков, Евгений Николаевич
}
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8.
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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9.
Bulgakov, E. N.
Switching through symmetry breaking for transmission in a T-shaped photonic waveguide coupled with two identical nonlinear micro-cavities / E. . Bulgakov, A. . Sadreev> // J. Phys.: Condens. Matter. - 2011. -
Vol. 23
,
Is. 31
. - Ст. 315303,
DOI
10.1088/0953-8984/23/31/315303. - Cited References: 32 . - ISSN 0953-8984
РУБ
Physics, Condensed Matter
Рубрики:
MODE THEORY
NUCLEAR REACTIONS
UNIFIED THEORY
FIBER
INSTABILITIES
RESONANCE
GRATINGS
SYSTEM
STATES
Кл.слова (ненормированные):
All-optical switching
--
Anti-symmetric
--
Central
waveguides
--
Coupled mode theory
--
Input power
--
Input pulse
--
Mirror symmetry
--
Nonlinear cavities
--
Output
waveguides
--
Photonic
waveguides
--
Standing wave
--
Symmetry-breaking
--
Microcavities
--
Mirrors
--
Waveguides
--
Light transmission
Аннотация:
Using coupled mode theory we consider transmission in a T-shaped waveguide coupled with two identical symmetrically positioned nonlinear micro-cavities with mirror symmetry. For input power injected into the central waveguide we show the existence of a symmetry breaking solution which is a result of mixing of the symmetrical input wave with an antisymmetric standing wave in the Fabry-Perot interferometer. With growth of the input power, a feature in the form of loops arises in the solution which originates from bistability in the transmission in the output left/right waveguide coupled with the first/second nonlinear cavity. The domains of stability of the solution are found. The breaking of mirror symmetry gives rise to nonsymmetrical left and right outputs. We demonstrate that this phenomenon can be explored for all-optical switching of light transmission from the left output waveguide to the right one by application of input pulses.
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Держатели документа:
[Bulgakov, Evgeny
Sadreev, Almas] LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
[Bulgakov, Evgeny] Siberian State Aerosp Univ, Krasnoyarsk, Russia
ИФ СО РАН
Kirensky Institute of Physics, Krasnoyarsk 660036, Russian Federation
Siberian State Aerospace University, Krasnoyarsk Rabochii, Krasnoyarsk 31, Russian Federation
Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич
}
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10.
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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11.
Chernozatonskii, L. A.
Electronic superlattices and
waveguides
based on graphene: structures, properties and applications / L. A. Chernozatonskii, P. B. Sorokin> // Phys. Status Solidi BVol. 245,
Is. 10
. - P. 2086-2089,
DOI
10.1002/pssb.200879578. - Cited References: 21. - We are grateful to the Joint Supercomputer Center of the Russian Academy of Sciences for the possibility of using a cluster computer for quantum-chemical calculations, to I.V. Stankevich, L. Biro and J. Bruning for fruitful discussions. The geometry of all presented structures was visualized by ChemCraft software (http://www.chemcraftprog.com). This work was supported by the Russian Foundation for Basic Research (project no. 08-02-01096). . - ISSN 0370-1972
РУБ
Physics, Condensed Matter
Рубрики:
PSEUDOPOTENTIALS
GAS
Аннотация:
The new class of quasi-2D superlattices based on graphene with periodically adsorbed hydrogen pairs was proposed. The ab initio DFT method was used for optimization of the atomic geometry and electronic structure of propose structures. It was found that the superlattices band gap decreases nonmonotonically with distance between hydrogen pairs. Based on these results we hope that the graphene superlattices can be promising candidates for various nanotechnological applications especially as elements in nanoelectronic devices. (C) 2008 WILEY-VCH Verlag GmBH & Co. KGaA, Weinheim
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Держатели документа:
[Chernozatonskii, Leonid A.
Sorokin, Pavel B.] Russian Acad Sci, Emanuel Inst Biochem Phys, Moscow 119334, Russia
[Sorokin, Pavel B.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Sorokin, Pavel B.] Russian Acad Sci, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosigina st., Moscow 119334, Russian Federation
Siberian Federal University, 79 Svobodny av., Krasnoyarsk 660041, Russian Federation
Kirensky Institute of Physics, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Доп.точки доступа:
Sorokin, P. B.; Сорокин, Павел Б.
}
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12.
Classical versus quantum
structure of the scattering probability matrix: Chaotic
waveguides
/ G. A. Luna-Acosta [et al.]> // Phys. Rev. E. - 2002. -
Vol. 65
,
Is. 4
. - Ст. 46605,
DOI
10.1103/PhysRevE.65.046605. - Cited References: 47 . - ISSN 1539-3755
РУБ
Physics, Fluids & Plasmas + Physics, Mathematical
Рубрики:
SEMICLASSICAL CROSS-SECTION
CONDUCTANCE FLUCTUATIONS
S-MATRIX
BALLISTIC-TRANSPORT
WEAK-LOCALIZATION
CAVITIES
COLLISIONS
MICROSTRUCTURES
DENSITY
CHANNEL
Кл.слова (ненормированные):
Chaos theory
--
Matrix algebra
--
Optical
waveguides
--
Quantum theory
--
Scattering
--
Wave equations
--
Chaotic cavities
--
Chaotic
waveguides
--
Quantum structure
--
Scattering probability matrix
--
Quantum optics
Аннотация:
The purely classical counterpart of the scattering probability matrix (SPM) \S(n,m)\(2) of the quantum scattering matrix S is defined for two-dimensional quantum
waveguides
for an arbitrary number of propagating modes M. We compare the quantum and classical structures of \S(n,m)\(2) for a waveguide with generic Hamiltonian chaos. It is shown that even for a moderate number of channels, knowledge of the classical structure of the SPM allows us to predict the global structure of the quantum one and, hence, understand important quantum transport properties of
waveguides
in terms of purely classical dynamics. It is also shown that the SPM, being an intensity measure, can give additional dynamical information to that obtained by the Poincare maps.
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Держатели документа:
Univ Autonoma Puebla, Inst Fis, Puebla 72570, Mexico
Univ Hradec Kralove, Dept Phys, Hradec Kralove, Czech Republic
Acad Sci Czech Republ, Inst Phys, Prague, Czech Republic
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН
Instituto de Fisica, Univ. Autonoma de Puebla, Apartado Postal J-48, Puebla 72570, Mexico
Department of Physics, University Haradec Kralove, Hradec Kralove, Czech Republic
Institute of Physics, Czech Academy of Sciences, Cukrovarnicka 10, Prague, Czech Republic
Kirensky Institute of Physics, 660036 Krasnoyarsk, Russian Federation
Доп.точки доступа:
Luna-Acosta, G. A.; Mendez-Bermudez, J. A.; Seba, P.; Pichugin, K. N.; Пичугин, Константин Николаевич
}
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13.
Demountable K/Q band
coaxial feed for Cassegrain antenna / K. V. Lemberg, N. M. Boev, A. V. Kantyshev [et al.]> //
2022 IEEE International Multi-Conference on Engineering, Computer and Information Sciences, SIBIRCON 2022 : IEEE, 2022. - P. 1150-1153,
DOI
10.1109/SIBIRCON56155.2022.10016929. - Cited References: 11
Кл.слова (ненормированные):
coaxial
waveguides
--
coaxial joint
--
reflector antenna feeds
--
dual-band feeds
--
multiband antennas
--
satellite communication
Аннотация:
In this paper demountable K/Q bands feed for satellite communication Cassegrain antenna is reported. The feed is based on the combined coaxial-circular waveguide, in which outer wall of a circular waveguide is used as an inner conductor of a coaxial waveguide. This design allows to simultaneously transmit and receive signals in two widely separated frequency bands. A coaxial joint, which is the key part of the feed, is proposed and described in details. The joint performs several functions. First is to transmit the microwave energy through both
waveguides
. Second is ensuring the
waveguides
sealing. And third is ensuring the circular and coaxial
waveguides
alignment. The joint simulation results demonstrated return loss below-20 dB and insertion loss less than 0.06 dB in 20-21 GHz frequency range (K-band) as well as return loss below-30 dB and insertion loss less than 0.15 dB in 43-45.5 GHz frequency range (Q-band). Mechanical prototype of the joint was manufactured and tested.
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Держатели документа:
Scientific Instruments Lab, Kirensky Institute of Physics, Krasnoyarsk, Russian Federation
Space Systems Design Office, JSC Information Satellite Systems, Zheleznogorsk, Russian Federation
Доп.точки доступа:
Lemberg, K. V.; Лемберг, Константин Вячеславович; Boev, N. M.; Боев, Никита Михайлович; Kantyshev, A. V.; Grican, O. B.; Shabanov, D. A.; Шабанов, Дмитрий Александрович; IEEE International Multi-Conference on Engineering, Computer and Information Sciences 2022(1-13 November 2022 ; Yekaterinburg, Russian Federation)
}
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14.
Fabry-Perot bound states
in the continuum in an anisotropic photonic crystal / S. V. Nabol, P. S. Pankin, D. N. Maksimov, I. V. Timofeev> // Phys. Rev. B. - 2022. -
Vol. 106
,
Is. 24
. - Ст. 245403,
DOI
10.1103/PhysRevB.106.245403. - Cited References: 42. - We acknowledge discussions with Almas F. Sadreev. This study was supported by the Council on Grants of the President of the Russian Federation (MK-4012.2021.1.2) . - ISSN 2469-9950. - ISSN 2469-9969
Перевод заглавия:
Связанное состояние в континууме Фабри-Перо в анизотропном фотонном кристалле
Кл.слова (ненормированные):
Fabry-Perot interferometers
--
Optical
waveguides
--
Photonic crystals
Аннотация:
An anisotropic photonic crystal containing two anisotropic defect layers is considered. It is demonstrated that the system can support a Fabry-Perot bound state in the continuum (FP-BIC). A fully analytic solution of the scattering problem as well as a condition for FP-BIC have been derived in the framework of the temporal coupled-mode theory.
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Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Доп.точки доступа:
Nabol, S. V.; Наболь, Степан Васильевич; Pankin, P. S.; Панкин, Павел Сергеевич; Maksimov, D. N.; Максимов, Дмитрий Николаевич; Timofeev, I. V.; Тимофеев, Иван Владимирович
}
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15.
Frequency mixing in
a gas-filled wave-guide for VUV light generation / V. G. Arkhipkin [et al.]> // Appl. Phys. B. - 1985. -
Vol. 37
,
Is. 2
. - P. 93-97,
DOI
10.1007/BF00692555. - Cited References: 17 . - ISSN 0721-7269
РУБ
Physics, Applied
Кл.слова (ненормированные):
42.65
--
LIGHT - Nonlinear Optical Effects
--
WAVEGUIDES
, OPTICAL
--
FREQUENCY MIXING
--
GAS-FILLED WAVEGUIDE
--
ULTRAVIOLET RADIATION
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Scopus
Держатели документа:
L. V. Kirensky Institute of Physics, USSR Academy of Sciences, Siberian Branch, Kransnoyarsk, SU-660036, Russia
Krasnoyarsk State University, Kransnoyarsk, SU-660036, Russia
Доп.точки доступа:
Arkhipkin, V. G.; Архипкин, Василий Григорьевич; Heller, Y. I.; Popov, A. K.; Попов, Александр Кузьмич; Provorov, A. S.
}
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16.
General framework of
bound states in the continuum in an open acoustic resonator / L. Huang, B. Jia, A. S. Pilipchuk [et al.]> // Phys. Rev. Appl. - 2022. -
Vol. 18
,
Is. 5
. - Ст. 054021,
DOI
10.1103/PhysRevApplied.18.054021. - Cited References: 47. - L.H. and A.E.M. are supported by the Australian Research Council Discovery Project (Grant No. DP200101353) and the UNSW Scientia Fellowship program. Y.K.C. and D.A.P. are supported by the Australian Research Council Discovery Project (Grant No. DP200101708). B.J., S.H., and Y.L. are supported by the National Natural Science Foundation of China (Grant No. 12074286) and the Shanghai Science and Technology Committee (Grant No. 21JC1405600). A.P., E.B., and A.S. are supported by the Russian Science Foundation (Grant No. 22-12-00070) . - ISSN 2331-7019
Кл.слова (ненормированные):
Acoustic resonators
--
Acoustic
waveguides
--
Bound-states
--
Coupled waveguide resonators
--
Degenerate modes
--
Eigen modes
--
General method
--
High-Q resonances
--
Momentum spaces
--
Non-Hermitian Hamiltonians
--
Waveguide-resonators
--
Waveguide filters
Аннотация:
Bound states in the continuum (BICs) provide a viable way of achieving high-Q resonances in both photonics and acoustics. In this work, we propose a general method of constructing Friedrich-Wintgen (FW) BICs and accidental BICs in a coupled acoustic waveguide-resonator system. We demonstrate that FW BICs can be achieved with arbitrary two degenerate resonances in a closed resonator, regardless of whether they have the same or opposite parity. Moreover, their eigenmode profiles can be arbitrarily engineered by adjusting the position of the attached waveguide. This suggests an effective way of continuously switching the nature of the BICs from FW BICs to symmetry-protected BICs or accidental BICs. Also, such BICs are sustained in the coupled waveguide-resonator system with shapes such as rectangles, ellipses, and rhomboids. These interesting phenomena are well explained by the two-level effective non-Hermitian Hamiltonian, where two strongly coupled degenerate modes play a major role in forming such FW BICs. Additionally, we find that such an open system also supports accidental BICs in geometry space instead of momentum space via tuning the position of the attached waveguide, which is attributed to the quenched coupling between the waveguide and eigenmodes of the closed cavity. Finally, we fabricate a series of three-dimensional coupled resonator
waveguides
and experimentally verify the existence of FW BICs and accidental BICs by measuring the transmission spectra. Our results complement the current BIC library in acoustics and provide nice routes for designing acoustic devices, such as acoustic absorbers, filters, and sensors.
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Держатели документа:
School of Engineering and Information Technology, University of New South Wales, Northcott Drive, Canberra, ACT 2600, Australia
Institute of Acoustics, Tongji University, Shanghai, 200092, China
L. V. Kirensky Institute of Physics, Federal Research Center KSC Siberian Branch, RAN, Krasnoyarsk, 660036, Russian Federation
Department of Electrical and Computer Engineering, Duke University, Durham, NC 27708, United States
Department of Mechanical Engineering, Rowan University, Glassboro, NJ 08028, United States
Доп.точки доступа:
Huang, L.; Jia, B.; Pilipchuk, A. S.; Пилипчук, Артем Сергеевич; Chiang, Y.; Huang, S.; Li, J.; Shen, C.; Bulgakov, E. N.; Булгаков, Евгений Николаевич; Deng, F.; Powell, D. A.; Cummer, S. A.; Li, Y.; Sadreev, A. F.; Садреев, Алмаз Фаттахович; Miroshnichenko, A. E.
}
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17.
Ignatchenko, V. A.
Green’s functions of spin and electromagnetic waves in the sinusoidal superlattice / V. A. Ignatchenko, D. S. Tsikalov> // Solid State Phenom. : Selected, peer reviewed papers. - 2015. -
Vol. 233-234
: Achievements in Magnetism. - P. 47-50,
DOI
10.4028/www.scientific.net/SSP.233-234.47 . - ISSN 1662-9779. - ISSN 978-3-038
Кл.слова (ненормированные):
Continued fractions
--
Electromagnetic waves
--
Green’s functions
--
Magnonic crystals
--
Photonic crystals
--
Sinusoidal modulation
--
Spin waves
--
Superlattices
--
Circular
waveguides
--
Fourier transforms
--
Green's function
--
Photonic crystals
--
Spin waves
--
Superlattices
--
Analytical expressions
--
Continued fraction
--
Fourier transformations
--
Magnonic crystals
--
S function
--
Sinusoidal modulation
--
Spectral representations
--
Electromagnetic waves
Аннотация:
The problem of finding the Green's function of spin and electromagnetic waves in the sinusoidal superlattice is considered. An analytical expression for the spectral representation of the Green's function has been found in the form of ascending continued fractions, the particular denominators of which are ordinary continued fractions. The Green’s function in the r -space has been found by the numerical Fourier transformation of the Greens’s function found in the spectral representation. © (2015) Trans Tech Publications, Switzerland.
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Доп.точки доступа:
Perov, N. \ed.\; Semisalova, A. \ed.\; Tsikalov, D. S.; Цикалов, Денис Сергеевич; Игнатченко, Вальтер Алексеевич; Moscow International Symposium on Magnetism(6 ; 2014 ; June-July ; Moscow)
}
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18.
Maksimov, D. N.
Bound states in elastic
waveguides
/ D. N. Maksimov, A. F. Sadreev> // Phys. Rev. E. - 2006. -
Vol. 74
,
Is. 1
. - Ст. 16201,
DOI
10.1103/PhysRevE.74.016201. - Cited References: 26 . - ISSN 1539-3755
РУБ
Physics, Fluids & Plasmas + Physics, Mathematical
Рубрики:
CLASSICALLY UNBOUND SYSTEM
QUANTUM WIRES
Аннотация:
We consider numerically the L-, T-, and X-shaped elastic
waveguides
with the Dirichlet boundary conditions for in-plane deformations (displacements) which obey the vectorial Navier-Cauchy equation. In the X-shaped waveguide we show the existence of a doubly degenerate bound state with frequency below the first symmetrical cutoff frequency, which belongs to the two-dimensional irreducible representation E of symmetry group C-4v. Moreover the next bound state is below the next antisymmetric cutoff frequency. This bound state belongs to the irreducible representation A(2). The T-shaped waveguide has only one bound state while the L-shaped one has no bound states.
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Держатели документа:
Russian Acad Sci, Inst Phys, Krasnoyarsk 660036, Russia
Linkoping Univ, Dept Phys & Measurement Technol, SE-58183 Linkoping, Sweden
ИФ СО РАН
Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Максимов, Дмитрий Николаевич
}
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19.
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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20.
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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