The propagation simulation of terahertz wave in PC materials

PC materials have been widely used in medical equipment, automotive manufacturing, aerospace, electronics and other fields, and its thickness detection has become an important part of its quality control. In this paper, based on the thickness detection requirements of PC materials, the propagation characteristics of THz waves in PC materials are simulated, and a pulsed terahertz reflection system is built. The PC materials of different thicknesses are sampled and their single-point waveforms are obtained as actual detection signals. Using the deconvoluted air signal as input, the optical parameters of PC material extracted by transmissive method, the propagation simulation model of THz wave in different thickness PC materials is established, and the simulation waveform is simulated from three aspects: flight time, waveform and amplitude. Compare and analyze the actual detected waveform.