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Based on computer simulation, we demonstrate the possibility of formation of solitons upon propagation of a femtosecond laser pulse in a medium containing gold nanoparticles in the presence of two-photon light absorption. The solitons are formed when the laser pulse induces a positive phase grating. The speed of solitons substantially exceeds the speed of laser radiation propagating in a linear medium. 相似文献
3.
M. D. Lysak 《Differential Equations》2016,52(4):517-521
For three-dimensional linear differential systems of a special form (for which the solution mappings are rotations in a given plane and dilations–contractions in the orthogonal direction), we study possible relations between the spectra of wandering velocities and wandering exponents of their solutions. 相似文献
4.
Tchaikovskaya O. N. Bocharnikova E. N. Bezlepkina N. P. Lysak I. A. Malinovskaya T. D. Lysak G. V. 《Russian Physics Journal》2022,64(11):2070-2075
Russian Physics Journal - The effect of UV radiation on the efficiency of bisphenol A (BPA) phototransformation in water in the presence of polypropylene nonwoven material based on ultrafine fibers... 相似文献
5.
Lysak G. V. Lysak I. A. Shabalina A. V. Izaak T. I. Malinovskaya T. D. 《Russian Journal of Applied Chemistry》2010,83(12):2193-2195
Catalytic activity of oxide nanostructure catalysts fixed on the surface of polymeric carrying agents was studied in relation
to the removal of organic substances difficultly decomposed by the chemical oxidation in the processes of ozonation of aqueous
solutions. 相似文献
6.
The kinetics and the mechanism of the liquid-phase oxidation of 2,4-dinitrotoluene with ozone in the presence of manganese(II) acetate have been investigated. The major products of 2,4-dinitrotoluene oxidation with ozone in acetic anhydride are 2,4-dinitrobenzyl acetate (65.8%) and 2,4-dinitrobenzylidene diacetate (18.8%). The effect of the manganese(II) acetate concentration on the selectivity of substrate oxidation at the methyl group is reported. A redox catalysis mechanism providing an explanation to experimental data is considered. 相似文献
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The response of a medium at the triple frequency under the action of few-period laser pulses is considered within the framework of the thin-optical-layer approximation for the case where the triple frequency is close to the natural frequency of the linear oscillator. It is shown that a bistable dependence of the polarization amplitudes on the external action amplitude simultaneously appears at both the natural frequency and the frequency of the external action. This allows one, in particular, to reveal the presence of bistability of the regime of third harmonic generation in a physical experiment by using the transmitted radiation of the acting pulse. A decrease in the duration of the pulse incident on the medium leads to an increase in the hysteresis loops. The effect of the absolute phase of a short pulse on the spectral composition of the response of the medium is studied. For pulses of medium duration, in addition to the resonant response of the medium, the presence of the dynamic response of the medium at the triple frequency was revealed, despite a detuning of the latter from the resonance. The presence of this frequency in the spectrum of the response of the medium results in the dependence of the resonant response of the medium on the absolute phase even for a sufficiently long pulse containing tens oscillations of the electric field strength under the pulse envelope. To obtain the dynamics of the spectral lines from the results of computer simulation, the Fourier-Gabor method is used, the applicability of which is demonstrated by the comparison of the results obtained on its basis with the corresponding analytical dependences. 相似文献
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