Terahertz Spectroscopy of Engineered Stone

In this work several brands of engineered stone composites have been studied in the terahertz band. The dielectric properties of the samples were determined using THz Time Domain Spectroscopy. Imaging of the internal stone patterns was performed as well. Results show different absorptions and refractive indexes for each brand which can be related to the different compounding processes employed. This study realizes the capability of terahertz radiation as a viable way of inspection of stone composites.