Witte's group builds table-top extreme-ultraviolet sources via high-harmonic generation and combines them with coherent diffractive imaging (ptychography) to visualize 3D nanostructures, such as multilayer IC features, at resolutions well below the diffraction limit of visible light. The lab also works on lensless microscopy, photoacoustic imaging/metrology, and ultrafast electron/HHG dynamics, sitting at the interface of fundamental attosecond-adjacent light-matter physics and applied nanometrology; the group is actively hiring as it ramps up at TU Delft.