Loading video.
VIDEO: This 3D animation shows the volume scan of a 900 μm thick structure, consisting of three layers of alumina ceramics. This structure cannot be sufficiently analyzed with commercial systems at. view more
Credit: Aron Vanselow and Sven Ramelow, Humboldt-Universität zu Berlin
WASHINGTON Researchers have shown that entangled photons can be used to improve the penetration depth of optical coherence tomography (OCT) in highly scattering materials. The method represents a way to perform OCT with mid-infrared wavelengths and could be useful for non-destructive testing and analysis of materials such as ceramics and paint samples.
OCT is a nondestructive imaging method that provides detailed 3D images of subsurface structures. OCT is typically performed using visible or near-infrared wavelengths because light sources and detectors for these wavelengths are readily available. However, these wavelengths don t penetrate very deeply into highly scattering or