The limits of applicability of the z-scan method for THz pulses from a small number of oscillations

A detailed analysis of the applicability limits the z-scan method exhibit when employed for THz radiation is conducted. THz pulses feature critically wide spectrum and ultrashort duration, which leads to a significant decrease in the accuracy of the results obtained by z-scan method. The work presents the estimations of the z-scan method accuracy obtained through the comparison of the results of the numerical simulations of the method and analytically calculated values. The focus of the analysis was laid on dispersion, diffraction, and nonlinearity effects contributions.