The new generation of higher resolution terahertz scanners
The absorption bands of almost all explosives are in terahertz radiation range, which makes it very effective in detecting them. Nowadays terahertz scanners have become increasingly important in counteracting terrorist threats – they are enabled to detect not allowed items for example carried by travellers at airports. However, commercially available terahertz scanners cannot achieve as high resolution as X-ray scanners, due to much longer terahertz wavelength. For this reason the images from terahertz scanners are blurry and not very detailed. Krzysztof Świtkowski, PhD, from the Faculty of Physics of the Warsaw University of Technology is working on improving the resolution of terahertz imaging.