Steffen Wietzke

TL;DR: Terahertz (THz) spectroscopy holds large potential in the field of nondestructive, contact-free testing as mentioned in this paper, and the ongoing advances in the development of THz systems, as well as the appearance of the first related commercial products, indicate that large-scale market introduction of THZ systems is rapidly approaching.

TL;DR: In this paper, the frequency dependent refractive index and absorption coefficient of a variety of common building and plastic materials between 100 and 1000 GHz were measured for the modeling of bound media propagation phenomena including single and multiple reflections, transmission, diffraction and scattering effects.

TL;DR: In this paper, the authors employed terahertz time-domain spectroscopy to study the sorption of water into two different materials: polyamide (PA) and wood plastic composite (WPC).

TL;DR: In this article, the first investigation of plastic weld joints using terahertz waves is presented, which reveals contaminations like metal or sand within the weld joint of two high-density polyethylene sheets.

TL;DR: In this paper, the authors presented terahertz transmission time-domain spectroscopy measurements on a variety of additive-polymer combinations with differing additive contents, and extracted indices of refraction provide a reliable determination of the additive content of the material combination.