München 2019 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 18: Postersitzung

P 18.74: Poster

Donnerstag, 21. März 2019, 16:30–18:30, Foyer Audimax

Bright terahertz-radiation source from two-color mid-infrared laser pulse interacting with a microplasma target — •Tatyana Liseykina¹ and Sergey Popruzhenko² — ¹Universität Rostock, Institut für Physik, Germany — ²National Research Nuclear University, MEPhI, Moscow, Russia

A way to a considerable enhancement of the terahertz radiation from atomic gases, irradiated by intense mid-infrared laser light has been recently suggested (V. A. Tulsky, M. Baghery, U. Saalmann, S. V. Popruzhenko, Phys. Rev. A 98, 053415 (2018)). In particular, theoretical analysis of both the single-atom-ionization dynamics and the collective motion of the laser-generated plasma (restricted to the 1D model) confirmed that the application of the circularly polarized laser light with 2-4 micrometer wavelength may result in considerable increase of the conversion efficiency of the infrared radiation into the emitted terahertz waves. In this work we present the results of the 2D particle-in-cell modeling of the terahertz response in the case of a two-color mid-infrared laser pulse propagating in argon.