Terahertz applications is a research field dedicated to exploring and harnessing the unique properties of electromagnetic radiation within the terahertz frequency band (approximately 0.1 to 10 THz). This domain investigates the generation, detection, and interaction of terahertz waves with various materials, developing technologies for diverse applications such as non-destructive imaging, spectroscopy for material identification, and high-bandwidth communication, recognizing their significance across scientific, industrial, and security sectors due to their non-ionizing nature and sensitivity to molecular dynamics.