Chemical mapping using reflection terahertz pulsed imaging

In this paper, we present the latest chemical mapping images of heterogeneous mixtures based on far-infrared reflection spectra obtained using a terahertz pulsed imaging system. The terahertz images and spectral data obtained have a spectral resolution of 1 cm(-1) and cover a spectral range of 5-80 cm(-1). This broad spectral coverage enables us to map out the spatial distribution of individual chemical components of a sample in a single measurement.