Generation of optical-terahertz solitons by a few-cycle laser pulse

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Abstract

The generation of broadband terahertz radiation using an extremely short laser pulse of high intensity is considered. Using numerical simulation of the generalized Yajima-Oikawa system, it is shown that in the generation of an optical-terahertz soliton, in contrast to the quasi-monochromatic case, Kerr nonlinearity plays an important role for a low-period pulse, considering its dispersion.

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About the authors

А. А. Kalinovich

Lomonosov Moscow State University

Author for correspondence.
Email: kalinovich@gmail.com
Russian Federation, Moscow

S. V. Sazonov

Lomonosov Moscow State University; National Research Centre “Kurchatov Institute”; Moscow Aviation Institute (National Research University)

Email: kalinovich@gmail.com
Russian Federation, Moscow; Moscow; Moscow

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Supplementary files

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2. Fig. 1. Peak intensities (a) of the optical (solid line) and terahertz (dashed line) components, profiles of the optical (red) and terahertz (blue) components at different distances (b, c, d). Initial amplitude Ψ0 = 1, second- and third-order dispersion coefficients Dk2 = 0.5, Dk3 = 0.5, dispersion of the oscillatory nature of the terahertz signal g = 10–5, quadratic and cubic nonlinearities Dσ = 1, p = 0, number of oscillations N = 10.

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3. Fig. 2. Similar to Fig. 1, with the same parameters, except p = –1.

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4. Fig. 3. Peak intensities (a) of the optical (solid line) and terahertz (dashed line) components, profiles of the optical (red) and terahertz (blue) components at different distances (b, c, d). Initial amplitude Ψ0 = 1, second- and third-order dispersion coefficients Dk2 = 0.5, Dk3 = 0.5, dispersion of the oscillatory nature of the terahertz signal γ = 10–5, quadratic and cubic nonlinearities Dσ = 1, p = 0, number of oscillations N = 3.

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5. Fig. 4. Similar to Fig. 3, with the same parameters, except p = –1.

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