The birth of terahertz imaging approximately coincides with the birth of the journal Optics
Express. The 20^ th anniversary of the journal is therefore an opportune moment to consider …

Cultural Heritage scientists need methodologies to examine Art and Archaeology in order to
understand artistic materials and techniques and devise better conservation procedures …

Hidden, sub-surface paint layers and features contain valuable information for the art-
historical investigation of a painting's past and for its conservation for coming generations …

Terahertz (THz) technology has firmly established itself as an effective sensing and
nondestructive testing (NDT) technique for the detection of substances and physicochemical …

Terahertz and millimeter waves penetrate various dielectric materials, including plastics,
ceramics, crystals, and concrete, allowing terahertz transmission and reflection images to be …

The authors present a review of the advances that have been made to establish terahertz
applications in the cultural heritage conservation sector over the last several years. This …

Terahertz electromagnetic waves propose attractive features such as non-invasive and non-
destructive analysis, transparency and good penetration depth through various materials …

In this paper we use a Terahertz (THz) time-domain system to image and analyze the
structure of an artwork attributed to the Spanish artist Goya painted in 1771. The THz images …

Chemometrics was applied to qualitative and quantitative analyses of terahertz spectra
obtained in transmission mode. A series of mixtures of three pure analytes, namely, citric …

Abstract Art painting diagnostic is commonly performed using electromagnetic waves at
wavelengths from terahertz to X-ray. These former techniques are essential in conservation …