Emerging Trends in THz Imaging and Spectroscopy: Propagation and Detection Techniques

THz imaging is emerging as a powerful technique to spatially map a wide variety of objects with spectral features which are present for many materials of current interest. Objects buried within common dielectrics can also be imaged due to their transparency in THz regime. Unfortunately, the image quality in such applications is inherently influenced by scattering introduced by the inhomogeneities and the presence of barriers. For continued development in this area, a comprehensive understanding of the role of these factors on THz radiation propagation and detection is vital. This monograph focuses on the various aspects like scattering, attenuation, frequency filtering and waveguide propagation of THz radiation and its subsequent application to a stand-off THz imager using interferometric detection technique. It also discusses about agent identification and role of different imaging system parameters using extensive simulation. This monograph would be an excellent source of reference for individuals working in THz related areas, particularly in THz imaging, for an up-to-date assessment of the emerging trends and lingering issues.