Study of THz time-domain spectroscopy based optical properties and detection of minerals and explosives from soil samples of different origins

We report the time domain THz-based optical evaluation of different sized soil samples obtained from the jungle and defense test range of the country. The soil samples testing exercise using reflection mode time-domain terahertz (THz) spectroscopy technique is related to the development of a small range THz radar system. The study helps us to understand the role of soil particles in terms of identifying the presence of minerals /ores including organic and explosives contaminants. The E-M waves between 0.1 - 4.0 THz range provide significant information of the soil of different origins in terms of refractive index and absorption coefficients etc.