Autors: Georgieva, D. A., Kovachev, L. M.
Title: New nonlinear parametric conversion mechanism for coherent THz generation
Keywords: Coherent THz generation, Cubic media, χ(3) parametric process, Optical fibers

Abstract: We propose a new nonlinear mechanism for coherent THz generation in cubic media. We show that this phenomenon can be presented only by χ(3) parametric process without inclusion of χ(2) processes. In this work we consider the particular case of generation of THz signal from femtosecond laser pulses propagating in optical fibers (fused silica). On the base of proposed theoretical model we derive a system of nonlinear partial differential equations investigated numerically by means of the split-step Fourier method. The numerical results show a significant coherent THz generation when the dispersion is negligible.


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AIP Conference Proceedings. 11th International Conference for Promoting the Application of Mathematics in Technical and Natural Sciences, AMiTaNS 2019; Flamingo Grand HotelAlbena; Bulgaria; 20 June 2019 through 25 June 2019, vol. 2164, issue 24, pp. Article number 100003, 2019, Bulgaria, American Institute of Physics Inc., DOI 10.1063/1.5130840

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