3-D Terahertz Synthetic-Aperture Imaging and Spectroscopy

Abstract

systems typically operate in transmission mode, reflection offers the most practical configuration for standoff detection, especially for objects with high water content (like human tissue) which are opaque at THz frequencies. In this re-

Synthetic Photoconductive Antenna Array for Terahertz 3-D Imaging and Spectroscopy

“…Reflected electric fields acquired at different positions were numerically processed to reconstruct a 3D image of the object over a large frequency band from 0.3 to 1.2 THz. This imaging system was further exploited to differentiate several types of materials of an object from the intensity variations on the image at specific resonance frequencies [23]. The interest of SA-TDS was also demonstrated with 2D imaging of metallic objects within a very large bandwidth of 2.5 THz by measuring the reflected signal from the objects in rotation.…”