We have developed low-cost THz-TDS to investigate various functional materials through the measurement of electrodynamic response. We can measure a few important physical properties of materials, for example, complex conductivity, dielectric constant, and magnetic susceptibility in the frequency range 0.03 to 0.95 THz.

The THz radiation is an efficient probe to study low-energy quasiparticle excitations and collective modes, including excitons, magnons, and phonons. Although many of these quantum phenomena are well investigated using different experimental techniques such as photo-emission spectroscopy, scanning tunneling microscopy (STM), magnetoelectric transport, magnetization measurements, neutron diffraction study, and measurement of electrodynamics response in the microwave and infrared regime, the light-matter interaction in the THz frequency range can reveals/exhibits many intriguing features. Therefore, THz-spectroscopy has been applied to study low-energy carrier dynamics in various condensed matter systems, for example, semiconductors, superconductors, magnetic and topological materials.