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    Nelson, C. S.
    Temperature- and magnetic-field-tuning of magnetic phases in multiferroic NdFe3(BO3)4 / C. S. Nelson, L. N. Bezmaternykh, I. A. Gudim // J. Korean Phys. Soc. - 2013. - Vol. 62, Is. 10. - P. 1410-1413DOI 10.3938/jkps.62.1410
   Перевод заглавия: Температурное и полевое уточнение магнитных фазовых переходов в мультиферроике NdFe3(BO3)4
Кл.слова (ненормированные):
Multiferroics -- Rare earth ferroborates -- Magnetic phase transitions -- Мультиферроики -- Редко-земельные ферробораты -- Магнитные фазовые переходы
Аннотация: We report the low-temperature coexistence in NdFe3(BO3)4 of an incommensurate magnetic phase with a strained commensurate magnetic phase that is primarily at the surface of the crystal Increasing the temperature or magnetic ﬁeld decreases the incommensurability and stabilizes the commensurate magnetic phase above Tic ≈ 14 K or Hic = 0.9 T. A comparison to published studies indicates the onset of longitudinal magnetostriction and electric polarization at the magnetic ﬁeldinduced transition, which may arise due to a basal plane spin-ﬂop and canting of moments along the ﬁeld direction.
Мы сообщаем о сосуществовании при низкой температуры в NdFe3(BO3)4 несоразмерной магнитной фазы с напряженной соразмерной магнитной фазой, которая проявляется прежде всего вблизи поверхности кристалла. Увеличение температуры или магнитного поля уменьшает несоразмерность и стабилизирует соразмерную магнитную фазу выше Тнесоразм ≈ 14 K или Ннесоразм = 0.9 T. Сравнение с уже опубликованными данными указывает на появление продольной магнитострикции и электрической поляризации в магнитоиндуцированном переходе, который может возникнуть из-за спин-флоп перехода в базовой плоскости и скашивания моментов вдоль направления магнитного поля.

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Держатели документа:
Brookhaven Natl Lab, Photon Sci Directorate, Upton, NY 11973 USA
RAS, Siberian Branch, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Gudim, I. A.
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Nelson, C. S.
Temperature- and Field-Tuning of Magnetic Phases in Multiferroic NdFe3(BO3)4 / L. N. Bezmaternykh, I. A. Gudim // The 19th International Conference on Magnetism with Strongly Correlated Electron Systems : book of abstracts. - 2012. - Ст. PA02. - P. 116

Материалы конференции

Доп.точки доступа:
Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Gudim, I. A.; Гудим, Ирина Анатольевна; Korean Physical Society; Korean Magnetics Society; International Union of Pure and Applied Physics; International conference on magnetism (19 ; 2012 ; Jul ; 8-13 ; Busan, Korea / Bexco, Korea)
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    Photoluminescence tuning via cation substitution in oxonitridosilicate phosphors: DFT calculations, different site occupations, and luminescence mechanisms / G. Li [et al.] // Chem. Mater. - 2014. - Vol. 26, Is. 9. - P. 2991-3001, DOI 10.1021/cm500844v. - Cited References: 62. - The authors would like to thank the Ministry of Science and Technology of Taiwan (Contract No. MOST 101-2113-M-002-014-MY3), the National Synchrotron Radiation Research Center, Taiwan, the National Natural Science Foundation of China (Grant No. NSFC 21301162), and the Fundamental Research Funds for the Central Universities (Grant No. CUG 130402) for financially supporting this research. Victor V. Atuchin gratefully acknowledges the Ministry of Education and Science of the Russian Federation for the financial support. . - ISSN 0897-4756. - ISSN 1520-5002
   Перевод заглавия: Управление фотолюминесценцией посредством замещения катионов в оксонитридосиликатных люминофорах: ТФП вычисления, заселения различных позиций и механизмы люминесценции

РУБ Chemistry, Physical + Materials Science, Multidisciplinary
Рубрики:
LIGHT-EMITTING-DIODES
   HIGH-TEMPERATURE SYNTHESIS
   LED CONVERSION PHOSPHORS
   CRYSTAL X-RAY
   WHITE-LIGHT
   ORDERED DISTRIBUTION
   GREEN PHOSPHOR
   LAYERED OXONITRIDOSILICATE
   REAL STRUCTURE
   AB-INITIO
Аннотация: Tuning and optimizing luminescent properties of oxonitridosilicates phosphors are important for white light-emitting diode (WLED) applications. To improve the color rendering index, correlated color temperature and thermal stability of layer-structured MSi2O2N2:Eu (M = Sr, Ba) phosphors, cation substitutions have been used to adjust their luminescent properties. However, the underlying mechanisms are still unclear. In this research, a series of (Sr1-xBax)Si2O2N2:Eu (0 ≤ x ≤ 1) compounds were prepared by solid-state reaction, after which systematic emission variations were investigated. The crystal structures of (Sr1-xBax)Si2O2N2:Eu (0 ≤ x ≤ 1) are nominally divided into three sections, namely, Phase 1 (0 ≤ x ≤ 0.65), Phase 2 (0.65 x 0.80), and Phase 3 (0.80 ≤ x ≤ 1) based on the X-ray diffraction measurements. These experimental results are further confirmed by optimizing the crystal structure data with first-principle calculations. Continuous luminescence adjustments from green to yellow are observed in Phase 1 with gradual replacement of Sr2+ with Ba2+, and the abnormal redshift is clarified through extended X-ray absorption fine structure analysis. Sr(Eu)-O/N bond length shrinkage in local structure causes the redshift emission, and the corresponding luminescence mechanism is proposed. Controllable luminescence in Phase 2 (from blue to white) and Phase 3 (from cyan to yellowish green) are observed. Based on the high-resolution transmission electron microscopy and selected area electron diffraction analysis, the two kinds of luminescence tuning are attributed to phase segregation. This study serves as a guide in developing oxonitride luminescent materials with controllable optical properties based on variations in local coordination environments through cation substitutions.

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Держатели документа:
Natl Taiwan Univ, Dept Chem, Taipei 106, Taiwan
China Univ Geosci, Fac Mat Sci & Chem, Wuhan 430074, Hubei, Peoples R China
SB RAS, Lab Crystal Phys, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
SB RAS, Lab Opt Mat & Struct, Inst Semicond Phys, Novosibirsk 630090, Russia
Tomsk State Univ, Funct Elect Lab, Tomsk 634050, Russia
Univ St Andrews, Sch Chem, EaSTCHEM, St Andrews KY16 9ST, Fife, Scotland
Natl Cent Univ, Ctr Neutron Beam Applicat, Zhongli 320, Taiwan
Natl Synchrotron Radiat Res Ctr, Hsinchu 300, Taiwan
Chongqing Univ Posts & Telecommun, Coll Math & Phys, Chongqing 400065, Peoples R China
Novosibirsk State Univ, Lab Semicond & Dielect Mat, Novosibirsk 630090, Russia

Доп.точки доступа:
Li, G.; Lin, C. C.; Chen, W.-T.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Atuchin, V. V.; Chiang, C.-Y.; Zhou, W.; Wang, C.-W.; Li, W.-H.; Sheu, H.-S.; Chan, T.-S.; Ma, C.; Liu, R.-S.
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    Chemical unit cosubstitution and tuning of photoluminescence in the Ca2(Al1-xMgx)(Al1-xSi1+x)O7:Eu2+ phosphor / Z. Xia [et al.] // J. Am. Chem. Soc. - 2015. - Vol. 137, Is. 39. - P. 12494-12497, DOI 10.1021/jacs.5b08315. - Cited References: 24. - This work was supported by the National Natural Science Foundations of China (Grant Nos. 51572023 and 51272242), Natural Science Foundations of Beijing (2132050), the Program for New Century Excellent Talents in University of Ministry of Education of China (NCET-12-0950), Beijing Nova Program (Z131103000413047), and the Funds of the State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, CAS (RERU2015022). C.M. acknowledges financial support from National Natural Science Foundation of China (Grant No. 11204393), Natural Science Foundation Project of Chongqing (Grant No. CSTC2014JCYJA50034), and National Training Programs of Innovation and Entrepreneurship for Undergraduates (Grant No. 201410617001). K.R. recognizes that this material is based upon work supported by the National Science Foundation Graduate Research Fellowship Program under Grant No. DGE-1324585. . - ISSN 0002-7863
   Перевод заглавия: Со-замещение химической группы и регулирование фотолюминесценции в люминофоре Ca2(Al1-xMgx)(Al1-xSi1+x)O7:Eu2+

РУБ Chemistry, Multidisciplinary
Рубрики:
LUMINESCENCE PROPERTIES
TRANSITIONS
IONS
Аннотация: The union of structural and spectroscopic modeling can accelerate the discovery and improvement of phosphor materials if guided by an appropriate principle. Herein, we describe the concept of chemical unit cosubstitution as one such potential design scheme. We corroborate this strategy experimentally and computationally by applying it to the Ca2(Al1-xMgx)(Al1-xSi1+x)O7:Eu2+ solid solution phosphor. The cosubstitution is shown to be restricted to tetrahedral sites, which enables the tuning of luminescent properties. The emission peaks shift from 513 to 538 nm with a decreasing Stokes shift, which has been simulated by a crystal-field model. The correlation between the 5d crystal-field splitting of Eu2+ ions and the local geometry structure of the substituted sites is also revealed. Moreover, an energy decrease of the electron-phonon coupling effect is explained on the basis of the configurational coordinate model. © 2015 American Chemical Society.

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Держатели документа:
School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing, China
College of Sciences, Chongqing University of Posts and Telecommunications, Chongqing, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, Russian Federation
Department of Chemistry, Northwestern University, Evanston, IL, United States

Доп.точки доступа:
Xia, Zhiguo; Ma, C.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Liu, Q.; Rickert, K.; Poeppelmeier, K. R.
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    Insights into Ba4Si6O16 structure and photoluminescence tuning of Ba4Si6O16:Ce3+,Eu2+ phosphors / Chen M. [et al.] // J. Mater. Chem. C. - 2015. - Vol. 3, Is. 48. - P. 12477-12483, DOI 10.1039/c5tc03271g. - Cited References: 39. - This work was supported by the National Natural Science Foundations of China (Grant No. 51572023 and 51272242), Natural Science Foundations of Beijing (2132050), the Program for New Century Excellent Talents in University of Ministry of Education of China (NCET-12-0950), Beijing Nova Program (Z131103000413047), the Funds of the State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University (KF201306), and Fundamental Research Funds for the Central Universities (FRF-TP-14-005A1). . - ISSN 2050-7534
   Перевод заглавия: Исследования структуры Ba4Si6O16 и люминесцентных свойств Ba4Si6O16:Ce3+,Eu2+

РУБ Materials Science, Multidisciplinary + Physics, Applied
Рубрики:
LIGHT-EMITTING-DIODES
   ENERGY-TRANSFER
   LUMINESCENCE PROPERTIES
   WHITE-LIGHT
   GLASS-CERAMICS
   BA PHOSPHORS
   EMISSION
   GREEN
   EU2+
   FLUORESCENCE
Аннотация: The versatile polymorphism and chemical compositions of barium silicates have been studied for a long time and their crystal structures have been established. Herein, we focused on the understanding of the crystal structure of the Ba4Si6O16 phase and the structural correlation of Ba4Si6O16 and Ba2Si3O8; moreover, the luminescence properties of Ce3+,Eu2+-co-activated Ba4Si6O16 phosphors have been discussed. Ba4Si6O16:Ce3+,Eu2+ phosphors show tunable blue-green emission upon excitation with 365 nm ultraviolet (UV) light. The blue emission originates from Ce3+, whereas the bluish-green emission is ascribed to Eu2+, and variation in the emission peak wavelength from 442 to 497 nm can be achieved by properly tuning the Ce3+/Eu2+ ratio. Energy transfer from Ce3+ to Eu2+ in the Ba4Si6O16 host has been validated by the variation of emission spectra as well as the variation of Ce3+ decay lifetimes with increasing Eu2+ concentration, and the energy transfer mechanism is demonstrated to be a resonant type via a dipole-dipole process. The results suggest that Ba4Si6O16:Ce3+,Eu2+ phosphors are potential candidates as a blue-green component for UV-excited white light-emitting diodes. © 2015 The Royal Society of Chemistry.

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Держатели документа:
Key Laboratory of New Energy Materials and Technologies, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, SB RAS, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, Russian Federation

Доп.точки доступа:
Chen M.; Xia Z.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Liu Q.
Свободных экз. нет}
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    Tuning of photoluminescence by cation nanosegregation in the (CaMg)x(NaSc)1-xSi2O6 solid solution / Z. Xia [et al.] // J. Am. Chem. Soc. - 2016. - Vol. 138, Is. 4. - P. 1158-1161, DOI 10.1021/jacs.5b12788. - Cited References: 23. - Work performed by Z.X. and Q.L. was supported by the National Natural Science Foundation of China (51272242 and 51572023), the Program for New Century Excellent Talents in the University of the Ministry of Education of China (NCET-12-0950), and the Beijing Nova Program (Z131103000413047). Work performed by G.L., J.W., Z.M., M.B., and D.J.M. at Argonne National Laboratory was supported by the Office of Basic Energy Sciences of the U.S. Department of Energy (DOE) through Grant DE-AC02-06CH11357 for research on heavy elements chemistry and materials sciences. TEM was accomplished in part at the Center for Nanoscale Materials, a DOE Office of Science User Facility under Contract DE-AC02-06CH11357. Sector 20 operations at APS are supported by DOE and the Canadian Light Source, with additional support from the University of Washington. G.L. acknowledges travel support from the CAS/SAFEA International Partnership Program for Creative Research Teams. K.R.P. gratefully acknowledges support from the National Science Foundation (DMR-1307698). . - ISSN 0002-7863
   Перевод заглавия: Управление люминесценцией за счет наносегрегации катионов в твердом растворе (CaMg)x(NaSc)1-xSi2O6

РУБ Chemistry, Multidisciplinary
Рубрики:
SPINODAL DECOMPOSITION
   ENERGY-TRANSFER
   EXSOLUTION
   CLINOPYROXEN
   NANOCRYSTALS
   SEGREGATION
   MECHANISMS
   PYROXENESS
   JERVISITE
   PHOSPHORS
Аннотация: Controlled photoluminescence tuning is important for the optimization and modification of phosphor materials. Herein we report an isostructural solid solution of (CaMg)x(NaSc)1-xSi2O6 (0 < x < 1) in which cation nanosegregation leads to the presence of two dilute Eu2+ centers. The distinct nanodomains of isostructural (CaMg)Si2O6 and (NaSc)Si2O6 contain a proportional number of Eu2+ ions with unique, independent spectroscopic signatures. Density functional theory calculations provided a theoretical understanding of the nanosegregation and indicated that the homogeneous solid solution is energetically unstable. It is shown that nanosegregation allows predictive control of color rendering and therefore provides a new method of phosphor development. © 2016 American Chemical Society.

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Держатели документа:
Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing, China
Chemical Sciences and Engineering Division, Argonne, IL, United States
Center for Nanoscale Materials, Nanoscience and Technology Division, Argonne, IL, United States
Nuclear Engineering Division, Argonne, IL, United States
X-ray Science Division, Argonne National Laboratory, Argonne, IL, United States
Laboratory of Crystal Physics, Kirensky Institute of Physics, SB RAS, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, Russian Federation
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China
Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL, United States

Доп.точки доступа:
Xia, Z.; Liu, G.; Wen, J.; Mei, Z.; Balasubramanian, M.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Peng, L.; Gu, L.; Miller, D. J.; Liu, Q.; Poeppelmeier, K. R.
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    New insight into the crystal structure of Sr4Ca(PO4)2SiO4 and the photoluminescence tuning of Sr4Ca(PO4)2SiO4:Ce3+,Na+,Eu2+ phosphors / M. Zhang [et al.] // J. Mater. Chem. C. - 2016. - Vol. 4, Is. 38. - P. 9078-9084, DOI 10.1039/c6tc03373c. - Cited References: 31 . - ISSN 2050-7534
   Перевод заглавия: Новый взгляд на кристаллическую структуру Sr4Ca(PO4)2SiO4 и управление люминесценцией в Sr4Ca(PO4)2SiO4:Ce3+,Na+,Eu2+
Кл.слова (ненормированные):
Calcium -- Energy transfer -- Europium -- Light emission -- Light emitting diodes -- Luminescence -- Phosphate minerals -- Phosphors -- Photoluminescence -- Positive ions -- Rietveld refinement -- Tuning -- Chemical compositions -- Energy transfer mechanisms -- Green component -- Hexagonal cells -- Luminescence properties -- Single phase -- Solid state method -- White lightemitting diodes (WLEDs) -- Crystal structure
Аннотация: A new single phase based on the substitution of a Sr cation by a Ca cation in the apatite-type Sr5(PO4)2(SiO4) has been fabricated with the nominal chemical composition of Sr4Ca(PO4)2(SiO4), which appears as a definite compound rather than a solid solution between (Sr,Ca)3(PO4)2 and (Sr,Ca)2SiO4. The crystal structure of Sr4Ca(PO4)2(SiO4) has been firstly analysed by the difference electron map, and further resolved by the Rietveld refinement, and the final composition has been determined as Sr4Ca(PO4)(2+x)(SiO4)(1-x)(OH)x (x = 0.64) with a hexagonal cell (P63/m). The Ce3+/Eu2+ codoped Sr4Ca(PO4)2SiO4 phosphors have been designed and prepared by the solid state method, and the photoluminescence tuning from blue to green upon 365 nm ultraviolet (UV) radiation can be realized, which is ascribed to the energy transfer from Ce3+ to Eu2+ ions. The luminescence properties and the energy transfer mechanism in Ce3+/Eu2+ codoped Sr4Ca(PO4)2SiO4 phosphors have been discussed, which might act as potential candidates for blue-green components in UV-pumped white light emitting diodes (WLEDs). © 2016 The Royal Society of Chemistry.

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Держатели документа:
School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, SB RAS, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, Russian Federation

Доп.точки доступа:
Zhang, M.; Xia, Z.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Shi, L.; Liu, Q.
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Dynamic tuning and memory switching of defect modes in a hybrid photonic structure / H. -T. Wang [et al.] // Crystals. - 2016. - Vol. 6, Is. 10. - Ст. 129, DOI 10.3390/cryst6100129. - Cited References: 32. - This work was financially sponsored by the Ministry of Science and Technology (MOST), Taiwan, under grant No. 103-2923-M-009-003-MY3, the Ministry of Education and Science of the Russian Federation under state order No. 3.1276.2014/K, and by the Siberian Branch of the Russian Academy of Sciences under Complex Program II.2P (projects Nos. 0358-2015-0010 and 0358-2015-0011). . - ISSN 2073-4352
Кл.слова (ненормированные):
Dual-frequency liquid crystals -- Energy-efficient photonic devices -- Photonic crystals
Аннотация: We propose a memorable and electrically tunable photonic device by infiltrating a dual-mode chiral-doped dual-frequency liquid crystal (LC) as the central defect layer in a one-dimensional photonic crystal (PC). According to the transmission properties of this structure, the wavelength tunability of defect modes is obtained by manipulating the LC layer in the dynamic mode due to the electrically controlled birefringence effect. Moreover, the switching between two memorable states, the splay and π-twist states, creates two distinct sets of defect modes at null voltage. The spectral characteristics of this device ensure its potential application as an energy-efficient multichannel wavelength filter.

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Держатели документа:
College of Photonics, National Chiao Tung University, Guiren Dist., Tainan, Taiwan
Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Laboratory for Nonlinear Optics and Spectroscopy, Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Wang, H.-T.; Wu, P.-C.; Timofeev, I. V.; Тимофеев, Иван Владимирович; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Lee, W.
}
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    Tuning of photoluminescence and local structures of substituted cations in xSr2Ca(PO4)2-(1 - x)Ca10Li(PO4)7:Eu2+ phosphors / M. Chen [et al.] // Chem. Mater. - 2017. - Vol. 29, Is. 3. - P. 1430-1438, DOI 10.1021/acs.chemmater.7b00006. - Cited References: 37. - The present work was supported by the National Natural Science Foundation of China (Grants 91622125 and 51572023), Natural Science Foundations of Beijing (2172036), and Fundamental Research Funds for the Central Universities (FRF-TP-15-003A2). . - ISSN 0897-4756
   Перевод заглавия: Управляемая люминесценция и локальная структура замещаемых катионов в люминофоре xSr2Ca(PO4)2-(1-x)Ca10Li(PO4)7:Eu2+
Кл.слова (ненормированные):
Calcium -- Energy transfer -- Europium -- Light emission -- Lithium -- Luminescence -- Phosphors -- Photoionization -- Photoluminescence -- Single crystals -- Composition ranges -- Crystal-field splitting -- Luminescence measurements -- Non-linear variation -- Photoionization process -- Polyhedra distortion -- Rare earth doped solids -- Temperature dependent -- Solid solutions
Аннотация: Local structure modification in solid solution is an essential part of photoluminescence tuning of rare earth doped solid state phosphors. Herein we report a new solid solution phosphor of Eu2+-doped xSr2Ca(PO4)2-(1 - x)Ca10Li(PO4)7 (0 ≤ x ≤ 1), which share the same β-Ca3(PO4)2 type structure in the full composition range. Depending on the x parameter variation in xSr2Ca(PO4)2-(1 - x)Ca10Li(PO4)7:Eu2+, the vacancies generated in the M(4) site enable the nonlinear variation of cell parameters and volume, and this increases the magnitude of M(4)O6 polyhedra distortion. The local structure modulation around the Eu2+ ions causes different luminescent behaviors of the two-peak emission and induces the photoluminescence tuning. The shift of the emission peaks in the solid solution phosphors with different compositions has been discussed. It remains invariable at x ≤ 0.5, but the red-shift is observed at x > 0.5 which is attributed to combined effect of the crystal field splitting, Stokes shift, and energy transfer between Eu2+ ions. The temperature-dependent luminescence measurements are also performed, and it is shown that the photoionization process is responsible for the quenching effect.

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Держатели документа:
Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, Russian Federation
State Key Laboratory of Tribology, Tsinghua University, Beijing, China

Доп.точки доступа:
Chen, M.; Xia, Z.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Wang, T.; Liu, Q.
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10.

Sadreev, A. F.
Tuning of Fano resonances by rotation of continuum: Wave faucet / A. F. Sadreev, A. S. Pilipchuk, A. A. Lyapina // Europhys. Lett. - 2017. - Vol. 117, Is. 5. - Ст. 50011, DOI 10.1209/0295-5075/117/50011. - Cited References:35. - This work has been supported by RFBR through Grant 17-02-00440. The authors thank E. N. Bulgakov and D. N. Maksimov for helpful discussions. . - ISSN 0295-5075. - ISSN 1286-4854

РУБ Physics, Multidisciplinary
Рубрики:
BOUND-STATES
TRAPPED MODES
ACOUSTIC RESONANCES
Аннотация: We consider wave transmission in a non-axisymmetric waveguide which consists of cylindrical resonator and two semi-infinite cylindrical waveguides whose axes are shifted relative to each other by azimuthal angle Δϕ. Although rotation by Δϕ does not change the eigenfrequency spectrum of the resonator, it effectively tunes the Fano resonances and respectively gives rise to an analog of a faucet opening and closing wave flux under rotation. Moreover, under the rotation of the waveguide and variation of the length of resonator, numerous events of the Fano resonance collapse occur to argue for the bound states in the continuum. In the nearest vicinity of the bound states scattering wave function with orbital angular momentum shows phase dislocations with giant vortical acoustic flows around.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Pilipchuk, A. S.; Пилипчук, Артем Сергеевич; Lyapina, A. A.; Ляпина, Алина Андреевна; Садреев, Алмаз Фаттахович; RFBR [17-02-00440]
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