Project

Marie Curie RISE "ATLANTIC": Advanced theoretical network for modeling light matter interaction

Goal: The ATLANTIC project is aiming at developing a network of advanced theoretical modeling of laser-matter interaction that will foster the development of novel theories by bridging the mathematical descriptions within a consortium of scientific groups who have pioneered these formalisms.

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Olga Fedotova
added a research item
The process of frequency doubling of the first type of interaction (oo-e) of intense short laser pulses in crystals with a regular domain structure was numerically studied. The influences of the group-velocity dispersion of the medium to the third order and Kerr-type cubic nonlinearity on the formation of the second harmonic pulse were analyzed. The case where the conditions of quasi-phase matching and group-velocity synchronism were both simultaneously satisfied was considered. In this case, an insignificant change in the domain size from the exact value providing the quasi-phase matching condition was shown to lead to a significant increase in the efficiency (almost double) of second harmonic generation. Calculations showed that the latter was due to mutual compensation of phase shifts caused by Kerr-type cubic nonlinearity, the dispersion of the medium, and the additional value of the wavenumber of the nonlinear grating. Lithium niobate with 5% added MgO (5% MgO:LiNbO3) was chosen as a periodically polarized crystal in which the conditions of quasi-phase matching and group-velocity synchronism could be created at a certain wavelength of fundamental radiation (~1560 nm).
U. K. Sapaev
added a research item
5 % добавкой оксида магния (5 % MgO:LiNbO 3), в котором можно создать условия квазисинхронизма и синхронизма групповых скоростей при определенной длине волны основного излучения (~1560 нм). Ключевые слова: кристаллы с регулярной доменной структурой, генерация второй гармоники, фемтосекундные импульсы, дисперсия, ниобат лития, 5 % MgO:LiNbO 3. The process of frequency doubling of the first type of interaction (oo-e) of intense short laser pulses in crystals with a regular domain structure has been studied by a numerical method. The influence of the dispersion of the medium up to the third order and cubic nonlinearity of the Kerr type on the formation of the second harmonic pulse are analyzed. The case is considered when both the conditions of quasi-phase matching and the synchronism of group velocities are simultaneously satisfied. It is shown that, in this case, an insignificant change in the domain size from the exact value providing the condition of quasi-phase matching leads to a significant increase in the efficiency (almost twofold) of second harmonic generation. Calculations show that the latter is due to the mutual compensation of phase shifts caused by the Kerr-type cubic nonlinearity, the dispersion of the medium and the additional value of the wave number of the nonlinear grating. Lithium niobate with a 5% addition of magnesium oxide (5% MgO: LiNbO3) was chosen as a periodically polarized crystal, in which it is possible to create, in addition to the condition of quasi-phase matching , also synchronism of group velocities at a certain value, the wavelength of the fundamental radiation (~1560 nm) Keywords: crystals with a regular domain structure, second harmonic generation, femtosecond pulses, dispersion, lithium niobate, 5% MgO:LiNbO 3 .
Thibault JY. Derrien
added a project goal
The ATLANTIC project is aiming at developing a network of advanced theoretical modeling of laser-matter interaction that will foster the development of novel theories by bridging the mathematical descriptions within a consortium of scientific groups who have pioneered these formalisms.