Abstract:
The authors demonstrate a flexible terahertz pulse-shaping technique, manipulating spatially
dispersed multifrequency components generated by optical rectification in a fanned-out periodically
poled lithium niobate crystal. Spatial masks of low pass, high pass, and double slit in front of the
crystal manipulate the spatial pattern of the optical excitation beam on the crystal, which is mapped
onto the intensity profile of the terahertz spectrum. The spatial dispersion of the terahertz spectrum
is removed by the line-to-point imaging of a spherical mirror.
