Security Lancaster Seminar
Professor Edmund Linfield, University of Leeds
Thursday 26 September 2013, 1300-1400
Terahertz Spectroscopy and Imaging
Over recent years, researchers have made rapid progress in developing systems to exploit the so-called 'Terahertz Gap' (~ 100 GHz - 10 THz) in the electromagnetic spectrum, with potential application areas ranging from process monitoring in the pharmaceutical sector, and the detection of drugs-of-abuse and explosives, through to atmospheric physics and astronomy.
In this presentation, I will review the design and implementation of terahertz spectroscopy and imaging systems based on: (a) time-domain spectroscopy, and (b) high-power (quantum cascade) semiconductor lasers. I will then discuss the interactions of terahertz radiation with crystalline materials, focusing on studies of pharmaceuticals, drugs-of-abuse, and explosives. The presentation will conclude by considering the potential applications for terahertz imaging systems in the security sector.