A Thz spectral characterization of the behaviour of different explosives is presented in this paper. This characterization
will be done in the frequency range from 20 GHz to 4 THz using a Teraview Spectra 3000. This system has a capacity of
measuring from 20 GHz to 4 THz fed by a laser source. With the Teraview Spectra 3000 equipment will be possible to
calculate the refractive index, the absorbance and other important parameters of the explosive samples. With this study it
will be possible to characterize some of the most common used explosives, i.e., gun explosive, gunpowder mine, pent,
TNT, RDX, etc, and it will allow to determine their electromagnetic peculiarities in order to design a future imaging
system that allow detecting them in security and defense sectors.