Figure 6.

Complex propagation of THz vortex beam through the scattering medium. (a, b) Retrieved spatial field and phase distribution of L₀¹ vortex beam at t = 0 ps. (c, d) Temporal profile of the retrieved THz pulse corresponding to two different pixels for the L₀ vortex beam in panels (a) and (b). (e–h) Same as panels (a–d) for an L₁¹ vortex beam. The 6.4 × 6.4 mm² sample illumination area is spatially sampled at 200 μm resolution, corresponding to a number of pixels of 32 × 32 (see Video S2).