Poster: Terahertz characteristics of TNT and CL-20 cocrystal at room and elevated temperatures

Terahertz time domain spectroscopy (THz-TDS), a non-invasive technique, is employed to examine the spectral characteristics of TNT and CL-20 cocrystal in 0.3 to 3.0 THz. The spectra are collected for varying temperatures from 300 K to 400 K. The dielectric constants of the cocrystal are extracted using effective medium theory. The real and imaginary parts of the dielectric constants are fitted using the Lorentz dispersion model combined with the Huang equation to identify the lattice vibrations in 0.3 to 3.0 THz. At elevated temperatures, the imaginary part of the dielectric constant exhibits distinguished peaks, and the corresponding lattice vibrations undergo a blue shift.