Terahertz emission from curved plasma filaments induced by two-color 2D Airy wave packets

We experimentally demonstrate that 2D Airy wave packets can produce intense curved two-color filaments that emit terahertz (THz) radiation with unique characteristics. Due to the curvature of the plasma channel, THz waves, emitted from different longitudinal regions of the plasma, propagate in different directions resulting in non-concentric THz cones in the far-field. These cones have different cone angles and polarization which we attribute to the way the two-color 2D Airy driving fields are produced in the nonlinear crystal and then propagate to form the curved plasma filament. (C) 2022 Optica Publishing Group

Automated summary

This experimental study demonstrates that 2D Airy wave packets can generate intense curved two-color filaments, emitting terahertz radiation with unique characteristics. The curvature of the plasma channel causes THz waves emitted from different longitudinal regions of the plasma to propagate in different directions, resulting in non-concentric THz cones in the far-field. These cones exhibit different cone angles and polarization, attributed to the generation and propagation of the two-color 2D Airy driving fields in the nonlinear crystal, forming the curved plasma filament.