Abstract
The terahertz band of the electromagnetic spectrum (1 THz ~ 4.1 meV) covers a range from 100 GHz (3 mm of wavelength) to 10 THz (30 µm). This technologically challenging area, situated between the realms of electronics and optics, remained unexplored until the emergence of affordable sources and the introduction of THz time-domain spectroscopy (THz-TDS). Since then, THz-TDS has evolved in…