Ultrafast terahertz pulses can be generated through a number of processes such its optical rectification in an electrooptic crystal, a current surge in a biased photoconductive antenna. or charge transfer in aligned molecules, It will be shown that all these rectification processes can be described by a single analytical formula in the frequency domain. A recipe is given for the quick calculation of terahertz waveforms generated through any rectification process and detected through electro-optic sampling. This theory is compared with experimentally measured terahertz waveforms.
Wynne, K., & Carey, J. J. (2005). An integrated description of terahertz generation through optical rectification, charge transfer, and current surge. Optics Communications, 256(4-6), 400-413. https://doi.org/10.1016/j.optcom.2005.06.065