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1.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Aleksandrovsky A. S., Vyunishev A. M., Shakhura I. E., Zaitsev A. I., Zamkov A. V.
Заглавие
: Nonlinear optical processes in domain structures of strontium tetraborate
Коллективы
: International Conference on Laser Optics
Место публикации
: Opt. Spectrosc. - 2009. - Vol. 107, Is. 3. - P.359-362. - ISSN 0030-400X,
DOI
10.1134/S0030400X09090070
Примечания
: Cited References: 11
Предметные рубрики:
HARMONIC
-
GENERATION
CRYSTALS
Аннотация:
The random quasi-phase-matching in irregular domain structures of strontium tetraborate has been investigated for nonlinear optical
generation
at 266 nm. The factor of increasing second-
harmonic
generation
efficiency due to random quasi-phase-matching is determined. The spectral dependences of the second-
harmonic
generation
are calculated. It is shown that its efficiency can be optimized at a fixed pump wavelength by rotating the domain structure.
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2.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Alekseev K. N., Alekseeva N. V., Perina J.
Заглавие
: Quantum-classical correspondence and nonclassical state
generation
in dissipative quantum optical systems
Место публикации
: J. Exp. Theor. Phys.: AMER INST PHYSICS, 2000. - Vol. 90, Is. 4. - P592-599. - ISSN 1063-7761,
DOI
10.1134/1.559142
Примечания
: Cited References: 32
Предметные рубрики:
2ND-
HARMONIC
GENERATION
STATISTICAL PROPERTIES
HARMONIC
-
GENERATION
SQUEEZED STATES
CHAOS
LIGHT
NONLINEARITIES
INSTABILITIES
DYNAMICS
ATOMS
Аннотация:
We develop a semiclassical method to determine the nonlinear dynamics of dissipative quantum optical systems in the limit of large number of photons N; it is based on the 1/N-expansion and the quantum-classical correspondence. The method is used to tackle two problems: the study of the dynamics of nonclassical state
generation
in higher order anharmonic dissipative oscillators and the establishment of the difference between the quantum and classical dynamics of the second-
harmonic
generation
in a self-pulsing regime. In addressing the first problem, we obtain an explicit time dependence of the squeezing and the Fano factor for an arbitrary degree of anharmonism in the short-time approximation. For the second problem, we analytically find a characteristic time scale at which the quantum dynamics differs insignificantly from the classical one. (C) 2000 MAIK "Nauka/Interperiodica".
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3.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Alekseev K. N., Perina J.
Заглавие
: The 1/N-expansion, quantum-classical correspondence and nonclassical states
generation
in dissipative higher-order anharmonic oscillators
Место публикации
: Phys. Scr.: ROYAL SWEDISH ACAD SCIENCES, 2000. - Vol. 61, Is. 1. - P7-16. - ISSN 0281-1847,
DOI
10.1238/Physica.Regular.061a00007
Примечания
: Cited References: 38
Предметные рубрики:
2ND-
HARMONIC
GENERATION
HARMONIC
-
GENERATION
SQUEEZED STATES
CHAOS
LIGHT
MECHANICS
DYNAMICS
STATISTICS
SYSTEMS
OPTICS
Аннотация:
We develop a method for the determination of the dynamics of dissipative quantum systems in the limit of large number of quanta N, based on the 1/N-expansion of Heidmann et al. [Opt. Commun. 54, 189 (1985)] and the quantum-classical correspondence. Using this method, we End analytically the dynamics of nonclassical states
generation
in the higher-order anharmonic dissipative oscillators for an arbitrary temperature of a reservoir. We show that the quantum correction to the classical motion increases with time quadratically up to some maximal value, which is dependent on the degree of nonlinearity and a damping constant, and then it decreases. Similarities and differences with the corresponding behavior of the quantum corrections to the classical motion in the Hamiltonian chaotic systems are discussed. We also compare our results obtained for some limiting cases with the results obtained by using other semiclassical tools and discuss the conditions for validity of our approach.
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4.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Solovev P. N., Afonin A. O., Belyaev B. A., Boev N. M., Govorun I. V., Izotov A. V., Ugryumov A. V., Leksikov An. A.
Заглавие
: Second
harmonic
generation
in thin permalloy film
Коллективы
: Russian Science FoundationRussian Science Foundation (RSF) [19-72-10047]
Место публикации
: J. Phys. D. - 2021. - Vol. 54, Is. 42. - Ст.425002. - ISSN 0022-3727,
DOI
10.1088/1361-6463/ac1762. - ISSN 1361-6463(eISSN)
Примечания
: Cited References: 43. - This work was supported by the Russian Science Foundation under Grant No. 19-72-10047. The equipment of the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center 'Krasnoyarsk Science Center SB RAS' was used during the measurement
Предметные рубрики:
FERROMAGNETIC-RESONANCE
MAGNETIZATION DYNAMICS
HARMONIC
-
GENERATION
FERRITES
Аннотация:
Second
harmonic
generation
versus strength and direction of the applied static magnetic field was measured for a thin permalloy (Ni80Fe20) film in a microstrip line at a driving frequency of 1 GHz and maximum input power of ~110 mW. The measurements revealed two peaks in the double frequency signal—in the low static field (~10 Oe) and the high one (~45 Oe). To explain these findings, a macrospin model of a thin magnetic film with in-plane uniaxial magnetic anisotropy was considered. A perturbation expansion of the Landau–Lifshitz–Gilbert equation provided an explanation of the experimental data. The analysis of the model revealed that the low-field peak was caused by the longitudinal second-order magnetization component and the high-field peak by the transversal one. It was also shown that the uniaxial magnetic anisotropy of the film and the dependence of the magnetic damping parameter on the applied field play an important role in the process of the second
harmonic
generation
. The results obtained give insights into some peculiarities of the nonlinear magnetization dynamics that are important in the development of magnetic film-based devices in the field of microwave signal processing and manipulation.
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5.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Aleksandrovsky A.S., Vyunishev A. M., Zaitsev A.I., Zamkov A. V., Slabko V.V.
Заглавие
: Tunable femtosecond frequency doubling in random domain structure of strontium tetraborate
Место публикации
: Opt. Commun. - 2009. - Vol. 282, Is. 11. - P.2263-2266. - ISSN 0030-4018,
DOI
10.1016/j.optcom.2009.02.070
Примечания
: Cited Reference Count: 16. - Гранты: The work was supported by the RFBR Grant 09-02-00670, Grants of the President of the Russian Federation for the support of leading scientific schools (Nos. SS-1011.2008.2 and SS-3818.2008.3), Grant No. RNP.2.1.1.3455, and the Projects 2.5.2 of PSB RAS, Nos. 5 and 27.1 of SB RAS.Финансирующая организация: RFBR [09-02-00670]; President of the Russian Federation [SS-1011.2008.2, SS-3818.2008.3]; PSB RAS [2.5.2]; SB RAS [5, 27.1]; [RNP.2.1.1.3455]
Предметные рубрики:
2ND-
HARMONIC
GENERATION
HARMONIC
-
GENERATION
BARIUM NIOBATE
CRYSTAL
Ключевые слова
(''Своб.индексиров.''): domain structures--femtosecond--frequency-doubling--
harmonic
frequencies--noncollinear--nonlinear photonic crystals--photonic structures--second harmonics--second-
harmonic
generations--spatial spectrum--tetraborate--
harmonic
generation
--photonic crystals--strontium--
harmonic
analysis
Аннотация:
Efficient tunable femtosecond phase-matched noncollinear second-
harmonic
generation
in randomized nonlinear photonic crystal of strontium tetraborate is obtained. Spatial spectrum of nonlinear photonic structure is not flat but enables tuning of the
harmonic
frequency in the range from 355 to 460 nm. The narrowing of the bandwidth of second
harmonic
is found to be of order of 10-20%. (C) 2009 Elsevier B.V. All rights reserved.
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6.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Aleksandrovsky A. S., Zaitsev A. I., Shakhura I. E. , Zamkov A. V., Vyunishev A. M.
Заглавие
: Random quasi-phase-matching in a nonlinear photonic crystal structure of strontium tetraborate
Место публикации
: Phys. Rev. A. - 2008. - Vol. 78, Is. 3. - Ст.031802. - ISSN 1050-2947,
DOI
10.1103/PhysRevA.78.031802
Примечания
: Cited Reference Count: 20. - Гранты: This work was supported by RFBR Grant No. 02-0700497, Grants of the President of the Russian Federation for the support of leading scientific schools (No. SS-1011.2008.2 and No. SS-3818.2008.3), Grant No. RNP.2.1.1.1814, and the Interdisciplinary Integration project of SB RAS 33.Финансирующая организация: RFBR [02-0700497]; Russian Federation [SS-1011.2008.2, SS-3818.2008.3, RNP.2.1.1.1814]; SB RAS 33
Предметные рубрики:
HARMONIC
-
GENERATION
DOMAIN-STRUCTURE
Ключевые слова
(''Своб.индексиров.''): alkaline earth metals--crystal atomic structure--experiments--
harmonic
generation
--photonic crystals--powders--random processes--strontium--angular dependences--enhancement factors--near ultraviolet--photonic crystal structures--quasi phase-matching--second-
harmonic
generation
--spectral dependences--tetra borate--crystal structure
Аннотация:
Random quasi-phase-matching (RQPM) of the second-
harmonic
generation
process is investigated experimentally and theoretically in a strongly randomized spontaneously grown nonlinear photonic crystal structure of strontium tetraborate. The thickness of domains in the structure is measured and employed in calculations of angular and spectral dependences of random quasi-phase-matching. Despite the great scale of randomness, the RQPM effect is preserved. The calculated enhancement factor due to RQPM is in excellent agreement with experiment, and good agreement between calculations and experiment is obtained for the shape of the angular dependence of RQPM. The calculated spectral dependence of RQPM consists of a number of narrow peaks, and a maximum enhancement factor is attained in the near ultraviolet. The band structure of randomized nonlinear photonic crystal is calculated.
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