Terahertz Detection of Substances for Security Related Purposes (original) (raw)

The paper presents a proof-of-concept study on the application of Terahertz-Time Domain Spectroscopy (THz-TDS) for the non-invasive detection of concealed substances in bags and packages, crucial for enhancing security protocols in areas like airports and shipping ports. The methodology involves recording spectral data from common materials, such as plastics and cotton, used in bag construction, followed by the development of an algorithm that analyzes the spectral content to identify illicit substances. Key experiments and results demonstrate distinct spectral signatures of various materials and substances, indicating the potential effectiveness of THz-TDS in security applications.