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A Change in the Directivity Pattern of Terahertz Pulses Formed by Filament Plasma in Air by Quasi-Waveguide Propagation

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Abstract

Directivity patterns of terahertz emission by femtosecond laser filament plasma in air after radiation propagation in hollow tubes with metal and dielectric (polypropylene) walls are experimentally studied. It is shown that narrow directed radiation can be obtained using quasi-waveguide propagation in a tube with dielectric walls, while the terahertz pulse duration is not affected significantly.

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Funding

This study was supported by the Russian Science Foundation (project no. 21-49-00023) and the National Natural Science Foundation of China (project no. 12061131010).

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Correspondence to D. V. Pushkarev.

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The authors declare that they have no conflicts of interest.

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Translated by A. Kazantsev

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Pushkarev, D.V., Seleznev, L.V., Rizaev, G.E. et al. A Change in the Directivity Pattern of Terahertz Pulses Formed by Filament Plasma in Air by Quasi-Waveguide Propagation. Bull. Lebedev Phys. Inst. 50, 237–242 (2023). https://doi.org/10.3103/S1068335623060088

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  • DOI: https://doi.org/10.3103/S1068335623060088

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