Fig. 1
Broadband speckle formation of THz fields. (a) Schematic showing the projection of a pulsed THz field at the source plane of the scattering sample and the collection of the scattered field via a time-domain THz imager. (b) Spatiotemporal THz field transmission through scattering samples exhibits temporal distortion, as shown in the pixel-wise time evolution of the pulses and random modulation in the spatial field distributions (video 1). Field amplitude is plotted 4 times the original spatial field at \(\:14.40\:\text{p}\text{s}\), \(\:15.00\:\text{p}\text{s}\), and \(\:18.90\:\text{p}\text{s}\). (c) The pixel-wise spectrum of scattered fields corresponds to the pulses shown in a. (d) Mean free path of the scattering sample within the THz source bandwidth (e) The spatial multiplexing of broadband THz fields and phases illustrates the broadband speckle synthesis within the THz source bandwidth (video 2).
