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1.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Arkhipkin V. G.
Заглавие : 2-photon-resonance and 3-photon-resonance displacement of frequencies and interference of quantum transitions
Место публикации : Zhurnal Eksperimentalnoi Teor. Fiz.: MEZHDUNARODNAYA KNIGA, 1995. - Vol. 108, Is. 1. - P.45-52. - ISSN 0044-4510
Примечания : Cited References: 16
Предметные рубрики: ELECTROMAGNETICALLY INDUCED TRANSPARENCY
ATOMIC-HYDROGEN
GENERATION
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2.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ikonnikov D. A., Myslivets S. A., Arkhipkin V. G., Vyunishev A. M.
Заглавие : 3D optical vortex lattices
Коллективы : Russian Science FoundationRussian Science Foundation (RSF) [19-12-00203]
Место публикации : Ann. Phys.-Berlin. - 2021. - Vol. 533, Is. 7. - Ст.2100114. - ISSN 0003-3804, DOI 10.1002/andp.202100114. - ISSN 1521-3889(eISSN)
Примечания : Cited References: 29. - This work was supported by the Russian Science Foundation (Grant No. 19-12-00203).The surface grating was fabricated and characterized at the Center for Collective Use of the Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences. The authors thank M. N. Volochaev and A. I. Zaitsev for help
Предметные рубрики: MANIPULATION
PARTICLES
ARRAY
BEAMS
GENERATION
TRANSPORT
VORTICES
Аннотация: Fresnel diffraction of light beams with a topological charge on a 2D regular amplitude transparency mask is studied. Numerical predictions show that the 3D optical lattices of optical vortices can be formed using the Talbot effect, with these predictions confirmed by the experimental reconstruction of all 3D optical vortex lattices. The periodicity of the 3D optical vortex lattices is determined by the light wavelength and periodicity of a transparency mask. Furthermore, it is shown that the optical vortices are created and annihilated during light propagation behind the mask with the preservation of the total topological charge. The 3D optical vortex lattices are considered to be tolerant to the perturbations induced by trapped particles caused by the features of the Talbot effect. The 3D optical vortex lattices open new possibilities for light-matter interactions and the related applications.
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3.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Tartakovsky G., Sokolov, Alexei V., Ivanov M., Arkhipkin V. G., Myslivets S. A., Luk’yanchuk B., Boltasseva A., Shalaev V. M.
Заглавие : A tribute to the memory of professor Alexander K. Popov
Место публикации : Nanophotonics. - 2022. - Vol. 11, Is. 21. - P.4603-4614. - ISSN 21928606 (ISSN), DOI 10.1515/nanoph-2022-0655. - ISSN 21928614 (eISSN)
Примечания : Cited References: 72
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4.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Arkhipkin V. G., Timofeev I. V.
Заглавие : Adiabatic propagation of short pulses under conditions of electromagnetically induced transparency
Место публикации : Quantum Electron.: Turpion LTD, 2000. - Vol. 30, Is. 2. - P.180-184. - ISSN 1063-7818, DOI 10.1070/QE2000v030n02ABEH001683
Примечания : Cited References: 31
Предметные рубрики: POPULATION TRANSFER
LASER-PULSES
INTERFERENCE
ENHANCEMENT
COHERENCE
QUANTUM
SYSTEMS
INDEX
Аннотация: The spatial and temporal dynamics of two short pulses propagating in an optically dense medium of resonant three-level Lambda-atoms is investigated numerically and analytically. The maximum coherence for the Raman transition due to coherent population trapping. it is shown that, at the initial stage of propagation, the waveforms of such pulses only slightly change along the length of the medium, which may considerably exceed the length of linear absorption for a single weak pulse. As the length of the absorbing medium increases, the energy of the probe (first) pulse is completely transferred into the second (control) pulse.
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5.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Arkhipkin V. G., Timofeev I. V.
Заглавие : Adiabatons and compression of pulses
Коллективы : International Conference on Physics and Control (2005 ; Aug ; 24-26; St Petersburg)
Место публикации : International Conference on Physics and Control (PHYSCON): IEEE, 2005. - P.668-671. - ISBN 0-7803-9234-5
Примечания : Cited References: 13
Аннотация: In the paper we analyze a propagation of a pulse pair in three-level atoms in a case of unequal oscillator strengths of two electric dipole transitions under coherent population trapping conditions. We show how to control the temporal shape of intense laser pulses using peculiarities of propagation dynamics under coherent population trapping. The temporal compression is demonstrated as a special case of pulse manipulation.
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6.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Arkhipkin V. G., Myslivets S. A.
Заглавие : All-optical switching in a photonic crystal with a defect containing an N-type four-level atomic system
Место публикации : Phys. Rev. A: American Physical Society, 2012. - Vol. 86, Is. 6. - Ст.063816. - ISSN 1050-2947, DOI 10.1103/PhysRevA.86.063816
Примечания : Cited References: 33. - This work was supported in part by the RAS Grants No. 24.29, No. 24.31, and No. 3.9.5, and SB RAS Grants No. 43 and No. 101.
Предметные рубрики: Electromagnetically-induced-transparency
Quantum interference
Microcavities
All-optical switching
Atomic medium
Cross-phase modulations
Defect mode
Electromagnetically induced transparency
Four-level atomic system
Kerr nonlinearity
Laser fields
Linear susceptibility
One dimensional photonic crystal
Probe field
Quantum interference
Resonance frequencies
Third-order susceptibility
Transmission spectrums
Two photon
Аннотация: We study the transmission spectra of a one-dimensional photonic crystal with a defect containing a four-level atomic medium that exhibits a greatly enhanced third-order susceptibility while having a vanishing linear susceptibility dependent on the electromagnetically induced transparency. Two ways of controlling the transmission of a photonic crystal are discussed: via absorption, i.e., nonlinear (two-photon) absorption of the probe field enhanced by constructive quantum interference, and via dispersion, which comes down to shifting the resonance frequency of the defect mode for the probe field by varying the refractive index based on the giant Kerr nonlinearity (cross-phase modulation). We demonstrate that such systems enable nonlinear all-optical switching at ultralow intensities of the coupling and switching laser fields.
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7.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Arkhipkin V. G., Myslivets S. A.
Заглавие : All-optical transistor using a photonic-crystal cavity with an active Raman gain medium
Место публикации : Physical Review A - Atomic, Molecular, and Optical Physics. - 2013. - Vol. 88, Is. 3. - Ст.033847. - P. - ISSN 1050-2947, DOI 10.1103/PhysRevA.88.033847
Аннотация: We propose a design of an all-optical transistor based on a one-dimensional photonic-crystal cavity doped with a four-level N-type active Raman gain medium. The calculated results show that in a photonic-crystal cavity of this kind transmission and reflection of the probe (Raman) beam are strongly dependent on the optical switching power. Transmission and reflection of the probe beam can be greatly amplified or attenuated. Therefore the optical switching field can serve as a gate field of the transistor to effectively control propagation of the weak probe field. It is shown that the group velocity of the probe pulse can be controlled in the range from subluminal (slow light) to superluminal (fast light).
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8.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Arkhipkin V. G., Gunyakov V. A., Myslivets S. A., Zyryanov V. Ya., Shabanov V. F.
Заглавие : Angular tuning of defect modes spectrum in the one-dimensional photonic crystal with liquid-crystal layer
Место публикации : Eur. Phys. J. E. - NEW YORK: SPRINGER, 2007. - Vol. 24, Is. 3. - С. 297-302. - NOV. - ISSN 1292-8941, DOI 10.1140/epje/i2007-10239-7
Примечания : Cited Reference Count: 28
Предметные рубрики: PERIODIC STRUCTURE
REFRACTIVE-INDEX
ENHANCEMENT
LIGHT
LASER
Ключевые слова (''Своб.индексиров.''): 42.25.bs wave propagation, transmission and absorption--42.70.df liquid crystals--42.70.qs photonic bandgap materials--angles of incidence--angular tuning--defect modes--electric polarization--photonic bandgap materials--radiation losses--absorption--defects--light polarization--liquid crystals--one dimensional--phase shift--wave propagation--photonic crystals
Аннотация: A one-dimensional ZrO2/SiO2 photonic crystal with a 4-n -pentyl-4'-cyanobiphenyl (5CB) nematic defect layer was used to investigate the transmission spectra of light polarized parallel and perpendicular to the liquid-crystal director at different angles of incidence. The spectra of the photonic crystal were shown to split into four polarized components T-ij at oblique incidence. When the incident angle increased, the bandgap edges and the defect modes shifted towards short wavelengths, while the amplitudes of the defect modes increased for the transverse magnetic polarization and decreased for the transverse electric polarization. The observed discrepancy between the defect mode amplitudes in the center and near the edges of the photonic bandgap was found to be related to the radiation losses inside the defect layer of a non-ideal photonic crystal. The simulated transmission spectra obtained using recurrence relations and taking into account the decay of defect modes are in good agreement with the experimental data.
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9.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vyunishev A. M., Bikbaev R. G., Svyakhovskiy, Sergey E., Timofeev I. V., Pankin P. S., Evlashin, Stanislav A., Vetrov S. Ya., Myslivets S. A., Arkhipkin V. G.
Заглавие : Broadband Tamm plasmon polariton
Коллективы : Russian Foundation for Basic Research (RFBR) [18-32-00053]; Russian Federation [MK-2761.2019.2]
Место публикации : J. Opt. Soc. Am. B. - 2019. - Vol. 36, Is. 8. - P.2299-2305. - ISSN 0740-3224, DOI 10.1364/JOSAB.36.002299. - ISSN 1520-8540(eISSN)
Примечания : Cited References: 50. - Russian Foundation for Basic Research (RFBR) (18-32-00053); Grant of the President of the Russian Federation (MK-2761.2019.2).
Предметные рубрики: PHOTONIC CRYSTAL
OPTICAL-CONSTANTS
PERFECT ABSORBER
ABSORPTION
Аннотация: A broadband Tamm plasmon polariton localized at the interface between the Bragg mirror and a thin metallic layer has been theoretically and experimentally investigated. The possibility of a localized state formation has been demonstrated and energy coefficients at the Tamm plasmon polariton wavelength have been predicted in the framework of the coupled mode theory. The metallic layer material and thickness corresponding to the maximum coupling between the incident radiation and the Tamm plasmon polariton has been determined. Experimental reflectance and transmittance spectra of the structure consisting of the Bragg mirror and chromium layers of different thicknesses have been measured. The analysis of the energy spectra shows the existence of the wavelength range with the near-unity absorption coefficient inside the Bragg mirror bandgap. The use of chromium as a metal results in the broadband Tamm plasmon polariton excitation. It is demonstrated that the experimental data is in a good agreement with the calculation.
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10.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Timofeev I. V., Vetrov S. Ya., Arkhipkin V. G., Lee, Wei, Zyryanov V. Ya.
Заглавие : Chiral optical Tamm states: coupled mode theory
Коллективы : Asian Conference on Liquid Crystals
Место публикации : The 3rd Asian Conf. on Liq. Cryst. (ACLC 2017): program book. - 2017. - Ст.IP-10. - P.24
Примечания : Библиогр.: 3
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11.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Timofeev I. V., Pankin P. S., Vetrov S. Ya., Arkhipkin V. G., Lee W., Zyryanov V. Ya.
Заглавие : Chiral optical Tamm states: method of images
Коллективы : "Days on diffraction", International conference, Санкт-Петербургское отделение Института математики им. В. А. Стеклова, Санкт-Петербургский государственный университет, Euler International Mathematical Institute, Российский фонд фундаментальных исследований
Место публикации : Int. conf. "Days on diffraction": Abstracts. - 2018. - P.216-217
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Timofeev I. V., Pankin, Pavel S., Vetrov S. Ya., Arkhipkin V. G., Lee, Wei, Zyryanov V. Ya.
Заглавие : Chiral optical Tamm states: temporal coupled-mode theory
Коллективы : Ministry of Science and Technology (MOST), Taiwan [106-2923-M-009-002-MY3]; Russian Foundation for Basic Research; Krasnoyarsk Region Science and Technology [17-42-240464]; Scholarship of the President of the Russian Federation [SP-227.2016.5]; Siberian Branch of the Russian Academy of Sciences [0356-2015-0410, 0356-2015-0411]; Government of Krasnoyarsk Territory
Место публикации : Crystals. - 2017. - Vol. 7, Is. 4. - Ст.113. - ISSN 2073-4352, DOI 10.3390/cryst7040113
Примечания : Cited References:71. - This work was financially sponsored by the Ministry of Science and Technology (MOST), Taiwan, under Grant No. 106-2923-M-009-002-MY3, the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, the Krasnoyarsk Region Science and Technology Support Fund to the research project No. 17-42-240464, the Scholarship of the President of the Russian Federation No. SP-227.2016.5 and by the Siberian Branch of the Russian Academy of Sciences under Complex Program II.2P (Project Nos. 0356-2015-0410 and 0356-2015-0411). The authors are thankful to A.F. Sadreev, E.N. Bulgakov, N.V. Rudakova, Y.-C. Hsiao and L.V. Pertseva for valuable discussions and comments.
Предметные рубрики: CHOLESTERIC LIQUID-CRYSTAL
SCULPTURED THIN-FILMS
PHOTONIC DEFECT
Ключевые слова (''Своб.индексиров.''): optical tamm state--cholesteric liquid crystal--handedness-preserving mirror
Аннотация: The chiral optical Tamm state (COTS) is a special localized state at the interface of a handedness-preserving mirror and a structurally chiral medium such as a cholesteric liquid crystal or a chiral sculptured thin film. The spectral behavior of COTS, observed as reflection resonances, is described by the temporal coupled-mode theory. Mode coupling is different for two circular light polarizations because COTS has a helical structure replicating that of the cholesteric. The mode coupling for co-handed circularly polarized light exponentially attenuates with the cholesteric layer thickness since the COTS frequency falls into the stop band. Cross-handed circularly polarized light freely goes through the cholesteric layer and can excite COTS when reflected from the handedness-preserving mirror. The coupling in this case is proportional to anisotropy of the cholesteric and theoretically only anisotropy in magnetic permittivity can ultimately cancel this coupling. These two couplings being equal result in a polarization crossover (the Kopp-Genack effect) for which a linear polarization is optimal to excite COTS. The corresponding cholesteric thickness and scattering matrix for COTS are generally described by simple expressions.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Arkhipkin V. G., Myslivets S. A.
Заглавие : Coherent control of light-pulse propagation in a Raman induced grating
Коллективы : Russian Foundation for Basic Research [15-02-03959]; Siberian Branch of the Russian Academy of Sciences under Complex Program II.2P [0356-2015-0410]
Место публикации : J. Opt.: IOP Publishing, 2017. - Vol. 19, Is. 5. - Ст.055501. - ISSN 2040-8978, DOI 10.1088/2040-8986/aa6498. - ISSN 2040-8986(eISSN)
Примечания : Cited References:26. - This work was supported by the Russian Foundation for Basic Research under Grant No. 15-02-03959 and partially by the Siberian Branch of the Russian Academy of Sciences under Complex Program II.2P (0356-2015-0410).
Предметные рубрики: OPTICS
MEDIA
Ключевые слова (''Своб.индексиров.''): light induced gratings--pulse propagation--raman gain
Аннотация: We study light-pulse propagation in a dynamically controllable periodic structure (grating) resulting from Raman interaction of a weak probe pulse with a standing-wave pump and a second control laser field in. N-type four-level atomic media. The grating is induced due to periodic spatial modulation of the Raman gain in a standing pump field (Raman gain grating). We show that it is possible to control both the probe pulse amplitude and the group velocity of the pulse from subluminal to superluminal by varying the pump or control field. Such a grating is of interest for. all-optical switches and transistors.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Arkhipkin V. G., Myslivets S. A.
Заглавие : Coherent manipulation of the Raman-induced gratings in atomic media
Коллективы : Russian Foundation for Basic Research [15-02-03959]
Место публикации : Phys. Rev. A: American Physical Society, 2016. - Vol. 93, Is. 1. - Ст.013810. - ISSN 1050-2947, DOI 10.1103/PhysRevA.93.013810. - ISSN 1094-1622(eISSN)
Примечания : Cited References:44. - This work was supported by the Russian Foundation for Basic Research through Grant No. 15-02-03959.
Предметные рубрики: ELECTROMAGNETICALLY INDUCED TRANSPARENCY
LIGHT
REFLECTION
OPTICS
Аннотация: We consider dynamically controllable periodic structures (gratings), resulting from Raman interaction of a weak probe field with a standing-wave pump and a second control laser field in four-level atomic media of N type. The gratings under study are induced due to periodic spatial modulation of the Raman gain in a standing pump field and fundamentally differ from the ones based on electromagnetically induced transparency. We show that spectral and transmission properties of these gratings can be controlled with the help of an additional weak field (control field) by varying its intensity or frequency. Small variations of the control field intensity can change the system from opaque to transparent and vice versa and this structure can operate as an all-optical transistor. Such a structure can also be used as a tunable nonlinear mirror with amplification.
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15.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Arkhipkin V. G., Myslivets S. A., Pankin P. S.
Заглавие : Control of light-pulse propagation in electromagnetically induced grating using additional driving field
Коллективы : International symposium and school for young scientist "Modern problems of laser physics", Международный симпозиум и школа для молодых ученых "Современные проблемы лазерной физики", Институт лазерной физики Сибирского отделения РАН, Новосибирский государственный университет, Институт спектроскопии РАН, Московский государственный университет им. М.В. Ломоносова, Всероссийский научно-исследовательский институт физико-технических и радиотехнических измерений
Место публикации : Mod. problems of laser phys.: матер. симп. - Новосибирск: ЗАО ИПП "Офсет", 2016. - P.258 (Шифр 26519667)
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16.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Gunyakov V. A., Myslivets S. A., Gerasimov V. P., Arkhipkin V. G., Zyryanov V. Ya., Shabanov V. F., Shabanov A. V., Vetrov S. Y., Kamaev G. N.
Заглавие : Control of transmission spectra of planar photonic crystal with LC defect
Коллективы : XV International Symposium on Advanced Display Technologies
Место публикации : Proceedings of SPIE - The International Society for Optical Engineering/ sponsors: SPIE Russia Chapter, P.N. Lebedev Physical Institute, Russia, Russian Foundation of Basic Research, Society for Information Display, Russia, European Office of Aerospace Research and Development ; XV International Symposium on Advanced Display Technologies (2006 ; 03.10 - 05.10 ; Moscow). - 2007. - 6637. - С. 66370L. - ISBN 0819467847, DOI 10.1117/12.742890 (Шифр 16957385)
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ikonnikov D. A., Arkhipkin V. G., Vyunishev A. M.
Заглавие : Controlling multiple diffraction with quasiperiodic gratings
Место публикации : Laser Phys. Lett. - 2019. - Vol. 16, Is. 12. - Ст.126202. - ISSN 1612-2011, DOI 10.1088/1612-202X/ab5845. - ISSN 1612-202X (eISSN)
Примечания : Cited References: 23. - The authors thank Prof Anatoly S Chirkin and Sergey A Myslivets for help and fruitful discussions.
Аннотация: Complex diffraction patterns are formed by sophisticated diffraction gratings. However, the methods of synthesizing of such gratings are complicated and resource intensive. We propose a simple analytical approach to forming one- and two-dimensional quasiperiodic gratings supporting multiple diffraction consisting of a set of diffraction maxima with the specified spatial frequency of certain diffraction order. The structure of a quasiperiodic grating is a superposition of harmonic functions, which provide a discrete spatial spectrum. The number of diffraction maxima, their angular positions, and intensity distribution between them can be controlled by choosing appropriate reciprocal lattice vectors and their amplitudes. This effect confirmed by the experiment opens new possibilities for light shaping, imaging, and radiation coupling.
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18.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Arkhipkin V. G., Gunyakov V. A., Myslivets S. A., Zyryanov V. Ya., Shabanov V. F.
Заглавие : Defect modes in real photonic crystals
Коллективы : International Conference on Advanced Optoelectronics and Lasers
Место публикации : Proceedings of CAOL 2008: 4th International Conference on Advanced Optoelectronics and Lasers. - 2008. - 4th International Conference on Advanced Optoelectronics and Lasers, CAOL 2008 (29 September 2008 through 4 October 2008, Alushta, Crimea, ) Conference code: 74830. - С. 183-185. - ISBN 9781424419746 (ISBN), DOI 10.1109/CAOL.2008.4671857
Ключевые слова (''Своб.индексиров.''): detect mode--liquid crystal--photonic band gap--photonic crystal--defect modes--detect mode--number of layers--photonic crystal structures--crystal atomic structure--crystal structure--defects--energy gap--gallium alloys--light sources--liquid crystals--liquid lasers--optical devices--photonic band gap--silicon on insulator technology--photonic crystals
Аннотация: It is demonstrated experimentally that amplitudes of defect modes of one-dimensional photonic crystal have maximal value near edges of the photonic band gap while at the centre of the stop-band they are reduced, moreover than more number of layers in photonic crystal, the less the amplitude of defect mode at the center of the PBG. We explain such behavior of defect modes presence of losses at propagation of light in real photonic crystal structures. © 2008 IEEE.
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19.

Вид документа : Статья из сборника (том многотомника)
Шифр издания :
Автор(ы) : Орешонков, Александр Сергеевич, Попов, Захар Иванович
Заглавие : DFT-моделирование спектров КРС монослоёв XMoY (X=S, Se; Y=Se, Te, O)
Коллективы : Сибирский федеральный университет, Российская академия наук, Сибирское отделение РАН, Федеральный исследовательский центр "Красноярский научный центр Сибирского отделения Российской академии наук", Институт физики им. Л.В. Киренского Сибирского отделения РАН, Всероссийская научная конференция с международным участием "Енисейская фотоника-2022", "Енисейская фотоника", Всероссийская научная конференция с международным участием
Место публикации : Енисейская фотоника-2022: тезисы докладов : в 2-х т./ Сиб. федер. ун-т [и др.]. - Красноярск, 2022. - Т. 1, Секция 1: Новые оптические материалы. - С. 89. - ISBN 978-5-6045250-1-2
Примечания : Библиогр.: 2
Аннотация: В работе выполнено численное моделирование спектров комбинационного рассеяния света монослоёв XMoY (X=S, Se; Y=Se, Te, O). Валидность используемого подхода подтверждена путём сравнения полученных спектров с имеющимися экспериментальными данными. Проанализированы как графеноподобные 1H и 1T фазы, так и монослои со структурами 1Tʹ, 1Hʹ, 1Aʹ и 1S.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Arkhipkin V. G., Ikonnikov D. A., Myslivets S. A.
Заглавие : Diffraction of a Laguerre-Gaussian beam in Raman interaction with a spatially periodic pump field
Место публикации : Phys. Rev. A. - 2023. - Vol. 107, Is. 2. - Ст.023519. - ISSN 24699926 (ISSN), DOI 10.1103/PhysRevA.107.023519. - ISSN 24699934 (eISSN)
Примечания : Cited References: 35. - This work was supported by the Russian Science Foundation (Grant No. 19-12-00203)
Аннотация: We studied Fresnel diffraction of a Laguerre-Gaussian beam LGp,l with arbitrary azimuthal l and radial p indices on a grating induced during its Raman interaction with a spatially periodic pump field in an atomic medium. The diffraction pattern turned out to be more complex than the classical Talbot effect observed when a plane wave illuminates a two-dimensional grating. The simulation results show that, under certain conditions, at distances corresponding to the classical Talbot planes (integer and fractional), periodic amplitude-phase distributions appear. The diffraction patterns are not a probe-field image in the induced grating plane, but a regular array of vortex annular-shaped microbeams with an inhomogeneous intensity distribution depending on the l and p indices and with a topological charge equal to that of the initial probe beam. The intensity and spatial distribution of diffraction patterns can be controlled by Raman amplification in the induced grating by varying the pump-field intensity or the Raman detuning.
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