Terahertz devices is a research field focused on the design, fabrication, and characterization of electronic and photonic components engineered to operate within the terahertz (THz) frequency range (typically 0.1 to 10 THz). This academic concept investigates novel methods for efficient generation, detection, modulation, and propagation of electromagnetic waves in this spectral gap, holding significant promise for applications in ultra-high-bandwidth wireless communication, advanced imaging, and spectroscopic analysis.