Fig. 4: Effect of propagation through plasma on the laser field distribution.
From: Direct observation of a wakefield generated with structured light
Distributions of the laser field averaged intensity of the axiparabola-focused pulse (red color scale) and relative electron density ne/n0 (blue color scale) in the excited wake at the propagating distance of 5.5 mm (a) with and (b) without plasma. The dashed line shows the dependence of the position of the peak intensity on the transverse coordinate.
