11 papers
Spatiotemporal Terahertz Emission Nanoscopy of Spintronic Photocurrents
F. Paries, R. Rouzegar, J. Cai +9
Capturing ultrafast spin and charge photocurrents on nanoscopic scales is essential for fundamental research in physics and engineering, as well as for future applications, such as…
Mach-Zehnder based Rotational Shearing Interferometer for Non-destructive Testing using Spatial Phase-Shifting Shearography
Valentin-Johannes Bastgen, Michael Schuth, Georg von Freymann
This work introduces a novel optical setup based on a Mach-Zehnder interferometer, enabling spatial phase shifting shearography with rotational shear. The optical concept employs a…
Accessibility of doping ranges of semiconductors by terahertz spectroscopy
Joshua Hennig, Jens Klier, Stefan Duran +4
While established semiconductor measurement techniques such as four-point probe or capacitance-voltage measurements require a physical contact to the material, terahertz spectrosco…
Automated Annotation of Shearographic Measurements Enabling Weakly Supervised Defect Detection
Jessica Plassmann, Nicolas Schuler, Michael Schuth +1
Shearography is an interferometric technique sensitive to surface displacement gradients, providing high sensitivity for detecting subsurface defects in safety-critical components.…
Converting vertical heat supply into horizontal motion for microtechnological pumping and autonomous waste heat recovery
Jan-Niklas Schäfer, Tillmann Carl, Kristin Kühl +4
The rapid advancement of high-performance computing infrastructure and its extended application produce an increasing amount of waste heat. This heat constitutes an unsustainable l…
Unsupervised Learning for Industrial Defect Detection: A Case Study on Shearographic Data
Jessica Plassmann, Nicolas Schuler, Georg von Freymann +1
Shearography is a non-destructive testing method for detecting subsurface defects, offering high sensitivity and full-field inspection capabilities. However, its industrial adoptio…