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Вид документа : Однотомное издание
Шифр издания : В37
Автор(ы) : Пичугин, Константин Николаевич
Заглавие : Эффекты квантовой интерференции в электронном транспорте через двумерные наноструктуры : автореф. дисна соиск. уч. степени канд. физ.-мат. наук. 01.04.07 - физ. конд. сост.
Выходные данные : Красноярск, 2007
Колич.характеристики :18 с
Коллективы : Российская академия наук, Сибирское отделение РАН, Институт физики им. Л.В. Киренского Сибирского отделения РАН, Институт физики полупроводников Сибирского отделения РАН
Примечания : Библиогр.
ГРНТИ : 29.19.16 + 29.31.21
Предметные рубрики: Наноструктуры-- Свойства электромагнитные-- Интерференция квантовая-- Исследование
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Вид документа : Однотомное издание
Шифр издания : В31/П 36 рукописный текст
Автор(ы) : Пичугин, Константин Николаевич
Заглавие : Эффекты квантовой интерференции в электронном транспорте через двумерные наноструктуры : дис. на соиск. уч. степени канд. физ.-мат. наук : 01.04.07
Выходные данные : Красноярск, 2007
Колич.характеристики :112 с
Коллективы : Российская академия наук, Сибирское отделение РАН, Институт физики им. Л.В. Киренского Сибирского отделения РАН
Примечания : Библиогр.
ГРНТИ : 29.19 + 29.05.33
ББК : В31я031
Экземпляры :ДС(1)
Свободны : ДС(1)
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Пичугин, Константин Николаевич, Садреев, Алмаз Фаттахович
Заглавие : Осцилляции Ааронова-Бома в двумерных мезоскопических кольцах
Коллективы : Российская академия наук, Сибирское отделение РАН, Красноярский научный центр Сибирского отделения РАН, Конференция молодых ученых [КНЦ СО РАН]
Место публикации : Конференция молодых ученых: материалы конф./ Рос. акад. наук [и др.]. - Красноярск, 1997. - С. 77-78
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Mendez-Bermudez J. A., Luna-Acosta G. A., Seba P., Pichugin K. N.
Заглавие : Understanding quantum scattering properties in terms of purely classical dynamics: Two-dimensional open chaotic billiards
Место публикации : Phys. Rev. E: AMER PHYSICAL SOC, 2002. - Vol. 66, Is. 4. - Ст.46207. - ISSN 1539-3755, DOI 10.1103/PhysRevE.66.046207
Примечания : Cited References: 34
Предметные рубрики: BALLISTIC-TRANSPORT
POINCARE SECTIONS
CAVITIES
EIGENFUNCTIONS
LOCALIZATION
CHANNEL
Ключевые слова (''Своб.индексиров.''): chaos theory--electron tunneling--laser applications--nonlinear systems--probability--waveguide components--chaotic motion--microlasers--quantum scattering--scattering probability--quantum theory--article
Аннотация: We study classical and quantum scattering properties of particles in the ballistic regime in two-dimensional chaotic billiards that are models of electron- or micro-waveguides. To this end we construct the purely classical counterparts of the scattering probability (SP) matrix \S(n,m)\(2) and Husimi distributions specializing to the case of mixed chaotic motion (incomplete horseshoe). Comparison between classical and quantum quantities allows us to discover the purely classical dynamical origin of certain general as well as particular features that appear in the quantum description of the system. On the other hand, at certain values of energy the tunneling of the wave function into classically forbidden regions produces striking differences between the classical and quantum quantities. A potential application of this phenomenon in the field of microlasers is discussed briefly. We also see the manifestation of whispering gallery orbits as a self-similar structure in the transmission part of the classical SP matrix.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pervushin V. N., Arbuzov A. B., Barbashov B. M., Nazmitdinov R. G., Borowiec A., Pichugin K. N., Zakharov A. F.
Заглавие : The general relativity with conformal units
Место публикации : Физ. элементар. частиц и атом. ядра: Объединенный институт ядерных исследований, 2012. - Т. 43, № 5. - P.1319-1331. - ISSN 0367-2026
Примечания : Библиогр.: 42 назв. - The authors would like thank M. Bordag, S. Deser, D. Ebert, A. Efremov, V. Gershun, Yu. Ignatev, E. Lukierski, and A. Zheltukhin for useful discussions. VNP and AB were supported in part by the Bogoliubov-Infeld program. AFZ is grateful to the JINR Directorate for a support.
Аннотация: General Relativity rewritten in conformal units identifies conformal intervals with the real observational distances. This identification gives a base to explain all epochs of the Universe evolution including Ia supernova luminosity long distance-redshift relation by the dominance of the Casimir vacuum energy of all physical fields. A set of arguments is discussed in favor that SNe Ia data in the conformal units can be an evidence of the conformal twistor structure of the space-time as a nonlinear realization of the affine group, like the nonlinear realization of chiral symmetry and phenomenological Lagrangian is evidence of the quark structure of hadrons.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pervushin V. N., Arbuzov A. B., Barbashov B. M., Nazmitdinov R. G., Borowiec A., Pichugin K. N., Zakharov A. F.
Заглавие : The general relativity with conformal units
Место публикации : Phys. Part. Nuclei: MAIK Nauka-Interperiodica / Springer, 2012. - Vol. 43, Is. 5. - P.682-688. - ISSN 1063-7796, DOI 10.1134/S1063779612050310
Примечания : Cited References: 42. - The authors would like thank M. Bordag, S. Deser, D. Ebert, A. Efremov, V. Gershun, Yu. Ignatev, E. Lukierski, and A. Zheltukhin for useful discussions. VNP and AB were supported in part by the Bogoliubov-Infeld program. AFZ is grateful to the JINR Directorate for a support.
Предметные рубрики: ACCELERATING UNIVERSE
COSMOLOGICAL CONSTANT
SUPERNOVA
SPACE
DECELERATION
GRAVITY
Аннотация: General Relativity rewritten in conformal units identifies conformal intervals with the real observational distances. This identification gives a base to explain all epochs of the Universe evolution including Ia supernova luminosity long distance-redshift relation by the dominance of the Casimir vacuum energy of all physical fields. A set of arguments is discussed in favor that SNe Ia data in the conformal units can be an evidence of the conformal twistor structure of the space-time as a nonlinear realization of the affine group, like the nonlinear realization of chiral symmetry and phenomenological Lagrangian is evidence of the quark structure of hadrons.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Sadreev A. F., Bulgakov E. N., Maksimov D. N., Pichugin K. N.
Заглавие : Symmetry breaking in open quantum nonlinear systems
Место публикации : Nonlinear phenomena in complex systems: from nano to macro scale: Springer, 2015. - P.235-252. - (NATO science for peace and security series C: Environmental security). - DOI 10.1007/978-94-017-8704-8_17. - ISBN 978-94-017-8704-8. - ISBN 978-94-017-8703-1
Аннотация: We consider symmetry breaking in the simplest open quantum nonlinear systems such as dimer and plaquette of four nonlinear sites coupled with linear tight-binding wires. If the solution is stationary, the total Hilbert space can be projected into the inner states of the dimer or plaquette by the Feshbach procedure. That derives a nonlinear analogue of the Lippmann-Schwinger equation with injected wave as a source. By neglecting radiation shifts the Lippmann-Scwinger equation limits to the coupled mode theory equations widely used in optics. We show three scenarios for the transmission through the nonlinear quantum systems. The first one inherits the linear case and preserves the symmetry. In the second scenario the symmetry is broken because of different intensities at the dimer sites. In the third scenario the intensities at the sites are equaled but phases of complex wave function are different. That results in a vortical power flow between the nonlinear sites similar to the DC Josephson current. We show how the phenomenon of symmetry breaking can used for switching of outputs symmetrically coupled to the quantum dimer . Also we reveal a domain in the parameter space where none of stationary solutions exist. As a result injection of a monochromatic symmetric wave gives rise to emission of nonsymmetric satellite waves with energies different from the energy of the incident wave. Thus, the response exhibits non monochromatic behavior.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bulgakov E. N., Shadrina, Galina, Sadreev A. F., Pichugin K. N.
Заглавие : Super-bound states in the continuum through merging in grating
Колич.характеристики :11 с
Место публикации : Phys. Rev. B. - 2023. - Vol. 108, Is. 12. - Ст.125303. - ISSN 24699950 (ISSN), DOI 10.1103/PhysRevB.108.125303. - ISSN 24699969 (eISSN)
Примечания : Cited References: 70. - We thankful Yi Xu and Zhanyuan Zhang for numerous fruitful discussions. The work was supported by Russian Science Foundation Grant No. 22-12-00070
Аннотация: We consider bound states in the continuum (BICs) in grating composed of infinitely long silicon rods of rectangular cross-section. We reveal merging off-Γ Friedrich-Wintgen BIC with symmetry protected BIC. We present CMT and multipole decomposition theory, complementing each other, to analyze the merging phenomenon. The theories show a crossover of the behavior of Q factor from standard inverse square law k-2x,z towards extremely fast boosting law k-6x,z in momentum space. In turn that crossover gives rise to another crossover from Q ~ N2 to Q ~ N3 for symmetry protected quasi-BIC in finite grating of N rods owing to suppression of radiation leakage of quasi-BIC mode from surface of grating. As a result, the Q factor of quasi-BIC is determined by residual leakage from ends of grating. We show numerically that this leakage can also be suppressed considerably if grating is stretched from the ends.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zhang, Zhanyuan, Bulgakov E. N., Pichugin K. N., Sadreev A. F., Xu, Yi, Qin, Yuwen
Заглавие : Super quasibound state in the continuum
Место публикации : Phys. Rev. Appl. - 2023. - Vol. 20, Is. 1. - Ст.L011003. - ISSN 23317019 (eISSN), DOI 10.1103/PhysRevApplied.20.L011003
Примечания : Cited References: 60. - Zhanyuan Zhang and Yi Xu would like to thank the suggestions from Dr Meng Kang and Professor Chengbo Mou. This work is supported by National Natural Science Foundation of China (62222505), Russian Science Foundation with Grant No. 22-12-00070 and the Guangdong Introducing Innovative, Entrepreneurial Teams of “The Pearl River Talent Recruitment Program” (2019ZT08X340). K. Pichugin,E. Bulgakov and A. Sadreev acknowledge the state assignment of Kirensky Institute of Physics
Аннотация: Avoided crossing of resonances and merging multiple bound states in the continuum (BICs) are parallel means for tailoring the physical properties of BICs. Herein, we introduce a concept of super quasi-BIC for photonic crystal (PhC) systems where its quality (Q) factor is boosted in both parametric and momentum spaces. A super quasi-BIC with substantial enhancement of Q factor can be achieved in a finite PhC by combining avoided crossing of two symmetry-protected (SP) quasi-BICs in parametric space and merging BICs in momentum space simultaneously. Of note, analytical theory shows that the proposed mechanism results in the transition of asymptotic behavior of the Q factor over the numbers of resonators from N2 to exclusive N3 for SP BICs, which is highly significant for realizing quasi-BICs in a compact PhC. Microwave experiments are performed to validate the theoretical results. Our results provide a paradigm shift for manipulating the physical properties quasi-BICs in finite PhC structures, which can also be generalized to the two-dimensional PhC slab case. It would facilitate various applications, including but not limited to low-threshold lasing and high figure-of-merit sensing, etc.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Berggren K. F., Pichugin K. N., Sadreev A. F., Starikov A. A.
Заглавие : Signatures of quantum chaos in the nodal points and streamlines in electron transport through billiards
Разночтения заглавия :us: Signature of quantum chaos in the nodal points and streamlines in electron transport through billiards
Место публикации : JETP Letters. - 1999. - Vol. 70, Is. 6. - P.403-409. - ISSN 0021-3640, DOI 10.1134/1.568188
Примечания : Cited References: 13
Предметные рубрики:
Аннотация: Streamlines and the distributions of nodal points are used as signatures of chaos in coherent electron transport through three types of billiards: Sinai, Bunimovich, and rectangular. Numerical averaged distribution functions of the nearest distances between nodal points are presented. We find the same form for the Sinai and Bunimovich billiards and suggest that there is a universal form that can be used as a signature of quantum chaos for electron transport in open billiards. The universal distribution function is found to be insensitive to the way the averaging is performed (over the positions of the leads, over an energy interval with a few conductance fluctuations, or both). The integrable rectangular billiard, on the other hand, displays a nonuniversal distribution with a central peak related to partial order of nodal points for the case of symmetric attachment of the leads. However, cases with asymmetric leads tend to the universal form. Also, it is shown how nodal points in the rectangular billiard can lead to "channeling of quantum flows," while disorder in the nodal points in the Sinai billiard gives rise to unstable irregular behavior of the flow. (C) 1999 American Institute of Physics. [S0021- 3640(99)00718-5].
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Puente A., Nazmitdinov R. G., Cerkaski M., Pichugin K. N.
Заглавие : Reply to "Comment on 'Thomson rings in a disk' "
Место публикации : Phys. Rev. E: American Physical Society, 2017. - Vol. 95, Is. 2. - Ст.026602. - ISSN 2470-0045, DOI 10.1103/PhysRevE.95.026602. - ISSN 2470-0053(eISSN)
Примечания : Cited References:5. - M.C. and K.P. are grateful for the warm hospitality at JINR. This work was supported in part by Bogoliubov-Infeld program of BLTP and Russian Foundation for Basic Research.
Аннотация: We demonstrate that our model [Phys. Rev. E 91, 032312 (2015)] serves as a useful tool to trace the evolution of equilibrium configurations of one-component charged particles confined in a disk. Our approach reduces significantly the computational effort inminimizing the energy of equilibrium configurations, and it demonstrates a remarkable agreement with the values provided by molecular-dynamics calculations. We show that the Comment misrepresents our paper and fails to provide plausible arguments against the formation hexagonal structure for n = 200 in molecular-dynamics calculations.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Severyukhin A. P., Aberg S., Arsenyev N. N., Nazmitdinov R. G., Pichugin K. N.
Заглавие : Random matrix analysis of the monopole strength distribution in 208Pb
Место публикации : Phys. At. Nucl.: Maik Nauka-Interperiodica Publishing, 2016. - Vol. 79, Is. 6. - P.835-841. - ISSN 10637788 (ISSN), DOI 10.1134/S1063778816060223
Примечания : Cited References: 36. - A.P.S. thanks for the hospitality the Division of Mathematical Physics, Lund University, where a part of this work has been done. This work was partly supported by Russian Foundation for Basic Research (project nos. 16-52-150003 and 16-02-00228).
Аннотация: We study statistical properties of the 0+ spectrum of 208Pb in the energy region Ex ≤ 20 MeV. We use the Skyrme interaction SLy4 as our model Hamiltonian to create a single-particle spectrum and to analyze excited states. The finite-rank separable approximation for the particle–hole interaction enables us to perform the calculations in large configuration spaces. We show that while the position of the monopole resonance centroid is determined by one-phonon excitations of 0+, the phonon–phonon coupling is crucial for the description of the strength distribution of the 0+ spectrum. In fact, this coupling has an impact on the spectral rigidity Δ3(L) which is shifted towards the random matrix limit of the Gaussian orthogonal ensembles.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pudlak M., Pichugin K. N., Nazmitdinov R. G., Pincak R.
Заглавие : Quantum nonequilibrium approach for fast electron transport in open systems: Photosynthetic reaction centers
Место публикации : Phys. Rev. E: AMER PHYSICAL SOC, 2011. - Vol. 84, Is. 5. - Ст.51912. - ISSN 1539-3755, DOI 10.1103/PhysRevE.84.051912
Примечания : Cited References: 34. - This work is partly supported by the Slovak Academy of Sciences in the framework of Center of Excellence NANOFLUID, VEGA Grants No. 2/0069/10, No. FIS2008-00781/FIS (Spain), and RFBR No. 11-02-00086 (Russia).
Предметные рубрики: BACTERIUM RHODOPSEUDOMONAS-VIRIDIS
PRIMARY CHARGE SEPARATION
AMINO-ACID-SEQUENCE
BACTERIOPHEOPHYTIN
RELAXATION
SUBUNIT
DONOR
MODEL
Ключевые слова (''Своб.индексиров.''): electron transfer--external fields--fast electron transport--initial conditions--non equilibrium--path-integral--perturbation theory--photosynthetic reaction center--second orders--time convolution--vibrational modes--electron transitions--perturbation techniques--quantum chemistry--photosynthesis
Аннотация: Creation of electrons or excitons by external fields in a system with initially statistically independent unrelaxed vibrational modes leads to an initial condition term. The contribution of this term in the time convolution generalized master-equation approach is studied in the second order of the perturbation theory in path-integral formalism. The developed approach, applied for the analysis of dynamics in the photosynthetic reaction center, exhibits the key role of the initial condition terms at the primary stage of electron transfer.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pudlak M., Pichugin K. N., Nazmitdinov R. G.
Заглавие : Cooperative phenomenon in a rippled graphene: Chiral spin guide
Коллективы : Russian Foundation for Basic Research [14-02-00723]; Vedecka Grantova Agentura MSVVaS SR a SAV [2/0037/13]
Место публикации : Phys. Rev. B: American Physical Society, 2015. - Vol. 92, Is. 20. - Ст.205432. - ISSN 1098-0121, DOI 10.1103/PhysRevB.92.205432. - ISSN 1550-235X(eISSN)
Примечания : Cited References:24. - M.P. and K.N.P. are grateful for the warm hospitality and creative atmosphere at UIB and JINR. This work was supported in part by Russian Foundation for Basic Research Grant No. 14-02-00723 and Vedecka Grantova Agentura MSVVaS SR a SAV (2/0037/13).
Предметные рубрики: CARBON NANOTUBES
Аннотация: We analyze spin scattering in ballistic transport of electrons through a ripple at a normal incidence of an electron flow. The model of a ripple consists of a curved graphene surface in the form of an arc of a circle connected from the left-hand and right-hand sides to two flat graphene sheets. At certain conditions the curvature-induced spin-orbit coupling creates a transparent window for incoming electrons with one spin polarization simultaneously with a backscattering of those with opposite polarization. This window is equally likely transparent for electrons with spin up and spin down that move in opposite directions. The spin-filtering effect that is small in one ripple becomes prominent with the increase of N consequently connected ripples that create a graphene sheet of the sinusoidal type. We present the analytical expressions for spin-up and spin-down transmission probabilities as a function of N connected ripples.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pichugin K. N., Sadreev A. F., Bulgakov E. N.
Заглавие : Ultrahigh-Q system of a few coaxial disks
Место публикации : Nanophotonics. - 2021. - Vol. 10, Is. 17. - P.4341-4346. - ISSN 21928614 (ISSN), DOI 10.1515/nanoph-2021-0345
Примечания : Cited References: 36. - The paper was funded by Russian Foundation for Basic Research project Nos. 19-02-00055 and the Silver age project of Guangdong province, China, Grant. 2020A131303010
Аннотация: Resonant modes of high contrast dielectric disk have finite Q-factors in the subwavelength range due to radiation leakage into the surrounding space. That leakage can be reduced considerably (a few times) by exploiting of the mechanism of destructive interference of two modes for avoided crossing of resonances (ACR) (Rybin et al. M. V. Rybin, K. L. Koshelev, Z. F. Sadrieva, et al., "High-Q Supercavity Modes in Subwavelength Dielectric Resonators,"Phys. Rev. Lett., vol. 119, p. 243901, 2017.). In the present paper we report suppression of radiation leakage by a few orders in magnitude via the ACR in the structure of three and four different coaxial disks. For fine multi-scale tuning of disks we reveal the ultrahigh-Q resonances of order 105 for the case of three disks and of order 106 for the case of four coaxial disks of equal radii.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pichugin K. N., Pudlak M., Nazmitdinov R. G.
Заглавие : Spin-orbit effects in carbon nanotubes - Analytical results
Место публикации : Eur. Phys. J. B: Springer, 2014. - Vol. 87, Is. 6. - Ст.124. - ISSN 1434-6028, DOI 10.1140/epjb/e2014-50076-6. - ISSN 1434-6036
Примечания : Cited References: 21
Предметные рубрики: ELECTRONS
TRANSPORT
GRAPHENE
Аннотация: Energy spectra and transport properties of armchair nanotubes with curvature induced spin-orbit interaction are investigated thoroughly. The spin-orbit interaction consists of two terms: the first one preserves the spin symmetry in rotating frame, while the second one breaks it. It is found that the both terms are equally important: (i) at scattering on the potential step which mimics a long-range potential in the nanotubes; (ii) at transport via nanotube quantum dots. It is shown that an armchair nanotube with the first spin-orbit term works as an ideal spin-filter, while the second term produces a parasitic inductance.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pichugin K. N., Sadreev A. F.
Заглавие : Self-induced light trapping in nonlinear Fabry–Perot resonators
Место публикации : Phys. Lett. A: Elsevier, 2016. - Vol. 380, Is. 42. - P.3570-3574. - ISSN 03759601 (ISSN), DOI 10.1016/j.physleta.2016.08.032
Примечания : Cited References: 32. - We thank D.N. Maksimov for discussions. The work was supported by Russian Science Foundation through grant 14-12-00266.
Ключевые слова (''Своб.индексиров.''): bound state in the continuum--fabry-perot resonator--light storage--nonlinear optics
Аннотация: In the framework of the coupled mode theory we consider light trapping between two off-channel resonators which serve as self-adjusted Fano mirrors due to the Kerr effect. By inserting an auxiliary nonlinear resonator between the mirrors we achieve self-tuning of phase shift between the mirrors. That allows for the light trapping for arbitrary distance between the mirrors. © 2016 Elsevier B.V.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pichugin K. N., Puente A., Nazmitdinov R.
Заглавие : Kramers Degeneracy and Spin Inversion in a Lateral Quantum Dot
Место публикации : Symmetry. - 2020. - Vol. 12, Is. 12. - Ст.2043. - ISSN 2073-8994, DOI 10.3390/sym12122043
Примечания : Cited References: 46
Аннотация: We show that the axial symmetry of the Bychkov–Rashba interaction can be exploited to produce electron spin-flip in a circular quantum dot, without lifting the time reversal symmetry. In order to elucidate this effect, we consider ballistic electron transmission through a two-dimensional circular billiard coupled to two one-dimensional electrodes. Using the tight-binding approximation, we derive the scattering matrix and the effective Hamiltonian for the considered system. Within this approach, we found the conditions for the optimal realization of this effect in the transport properties of the quantum dot. Numerical analysis of the system, extended to the case of two-dimensional electrodes, confirms our findings. The relatively strong quantization of the quantum dot can make this effect robust against the temperature effects.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pichugin K. N., Sadreev A. F.
Заглавие : Interaction between coaxial dielectric disks enhances the Q factor
Коллективы : Russian Federation for Basic Research (RFBR)Russian Foundation for Basic Research (RFBR) [19-02-00055]; Ministry of Education and Science of Russian FederationMinistry of Education and Science, Russian Federation [3.1845.2017]
Место публикации : J. Appl. Phys. - 2019. - Vol. 126, Is. 9. - Ст.093105. - ISSN 0021-8979, DOI 10.1063/1.5094188. - ISSN 1089-7550(eISSN)
Примечания : Cited References: 32. - We are grateful to A. A. Bogdanov, E. N. Bulgakov, and D. N. Maksimov for numerous and fruitful discussions. This work was supported by the Russian Federation for Basic Research (RFBR) (Grant No. 19-02-00055) and Ministry of Education and Science of Russian Federation (State Contract No. 3.1845.2017).
Предметные рубрики: WHISPERING-GALLERY MODES
QUALITY-FACTOR
Аннотация: We study the behavior of resonant modes under variation of the distance between two coaxial dielectric disks and show an avoided crossing of resonances because of the interaction between the disks. Owing to coaxial arrangement of disks, the resonant modes are specified by the azimuthal index m = 0,1,2, ... . In the present paper, we consider the case m = 0. At a long enough distance, the modes are symmetric and antisymmetric hybridizations of the resonant modes of the isolated disk. With decreasing the distance, the interaction becomes stronger, giving rise to avoided crossings of different resonances of the isolated disk. This in turn enhances the Q factor of the two disks by one order in magnitude compared to the Q factor of the isolated disk.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pichugin K. N., Maksimov D. N., Sadreev A. F.
Заглавие : Goos-Hanchen and Imbert-Fedorov shifts of higher-order Laguerre-Gaussian beams reflected from a dielectric slab
Коллективы : Russian Foundation for Basic Research (RFBR) [17-52-45072]
Место публикации : J. Opt. Soc. Am. A. - 2018. - Vol. 35, Is. 8. - P.1324-1329. - ISSN 1084-7529, DOI 10.1364/JOSAA.35.001324. - ISSN 1520-8532(eISSN)
Примечания : Cited References: 42. - Russian Foundation for Basic Research (RFBR) (17-52-45072).
Предметные рубрики: ORBITAL ANGULAR-MOMENTUM
LIGHT-BEAM
TRANSVERSE SHIFT
LASER MODES
Аннотация: We consider reflection of the Laguerre-Gaussian light beams by a dielectric slab. In view of the unified operator approach, the higher-order Laguerre-Gaussian beams represent a parametric family with the transverse beam profile given by an arbitrary generating parameter. Relying on the Fourier expansion in the focal plane of the beam, we compute the Goos-Hanchen and the Imbert-Fedorov shifts for light beams with non-zero order and azimuthal index. It is demonstrated that both shifts exhibit resonant behavior as functions of the angle of incidence due to the interference between the waves reflected from the upper and lower interfaces. The centroid shifts strongly depend on the order and azimuthal index of the beam. Most interestingly, it is found that the generating parameter of the higher-order beam families strongly affects the shifts. Thus, reshaping of the incident wavefront with fixed order and azimuthal index changes the linear Goos-Hanchen shift up to one half of the beam radius, both negative and positive.
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