Extraction of the complex permittivity parameters from single pulse terahertz transmission spectroscopy

Terahertz spectroscopy is a very efficient technique for material detection and identification especially due to the unique spectral fingerprint of materials in the terahertz range. In this work, we describe a reliable calculation method that allows the calculation of the complex permittivity from single pulse terahertz transmission spectroscopy. This model-based calculation method will allow for substance detection and identification without requiring model simplification or any sample restrictions. We find out that, when correctly employed, this method yields good results compared to other already published methods.