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Pré-Publication, Document De Travail Année : 2024

Universal properties of locally generated terahertz waveforms from polarization-controlled two- and multi-color ionizing fields

Résumé

The polarization states of terahertz (THz) radiation generated in a photo-ionized gas driven by strong two- or multi-frequency fields with locally controlled polarization are studied. We reveal a universal property of the resulting THz waveforms: the ellipticity of their polarization state increases linearly with the frequency. This ``linear chirp of ellipticity'' makes plasma-based THz generation unique among other THz sources. However, it also puts some constraints on the polarization properties of the generated THz radiation. We derive a general expression for the THz ellipticity and demonstrate how the polarization states of the generated THz waveforms can be manipulated and controlled by the polarization of the pump pulses.
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Dates et versions

hal-04625037 , version 1 (25-06-2024)

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H. Alirezaee, Stefan Skupin, V. Vaicaitis, A. Demircan, I. Babushkin, et al.. Universal properties of locally generated terahertz waveforms from polarization-controlled two- and multi-color ionizing fields. 2024. ⟨hal-04625037⟩
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