Investigation of surface relief and uniformity of objects by methods of terahertz spectroscopy

A technique has been developed for constructing the relief of sample surfaces based on amplitude- and phase-frequency characteristics in the terahertz frequency range. Based on the conducted studies, 2D images of sample surfaces were obtained. The degree of coincidence of surface representations in the amplitude-frequency and phase-frequency spaces is quite high (about 75-80%), which creates prerequisites for further development of the method of constructing the energy relief of surfaces in order to study the internal structure and features of changes in the physical parameters of objects with an inhomogeneous structure