A soliton-like mode of generation of terahertz radiation by optical pulses with tilted wavefronts in a quadratic nonlinear medium has been studied. It has been shown that the formation of an optical–terahertz soliton at a positive dispersion of the group velocity above a critical value, which depends on the tilted angle, and at a negative nonlinear susceptibility in the optical range is accompanied by the generation of a terahertz unipolar soliton propagating in a different direction.
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This work was supported by the Russian Foundation for Basic Research (project no. 19-02-00234).
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Sazonov, S.V., Ustinov, N.V. Optical–Terahertz Solitons with Tilted Fronts. Jetp Lett. 114, 380–386 (2021). https://doi.org/10.1134/S0021364021190103
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DOI: https://doi.org/10.1134/S0021364021190103