Abstract

Most non-conductive materials and non-polar liquids are transparent to terahertz frequencies (0.2-2THz), and due to their non-ionizing photon energies there is great interest and potential in imaging in the THz regime [1]. However, the long wavelengths (1.5-0.15mm) mean that even diffraction limited imaging will fail to resolve structures of micron size many of which have interesting THz interactions. Currently the two most popular approaches for near field THz imaging lie in either scattering tip [2] or scanning aperture methods [3]. Both these approaches rely on a point by point measurement in the near field, and are therefore inherently slow.

© 2017 IEEE