Article Dans Une Revue Physical Review Letters Année : 2025

Steering Laser-Produced THz Radiation in Air with Superluminal Ionization Fronts

Résumé

We demonstrate that pulsed THz radiation produced in air by a focused ultrashort laser pulse can be steered to large angles or even in the backward direction with respect to the laser propagation axis. The emission angle is adjusted by the flying focus technique, which determines the speed and direction of the ionization front created by the single-color laser pulse. This easily adjustable THz source, being well separated from the intense laser, opens exciting applications for remote THz spectroscopy.
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hal-04921299 , version 1 (30-01-2025)

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Silin Fu, Baptiste Groussin, Yi Liu, André Mysyrowicz, Vladimir Tikhonchuk, et al.. Steering Laser-Produced THz Radiation in Air with Superluminal Ionization Fronts. Physical Review Letters, 2025, 134 (4), pp.045001. ⟨10.1103/PhysRevLett.134.045001⟩. ⟨hal-04921299⟩
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