Meet the speaker: Martin Wegener


Martin Wegener is a professor at Karlsruhe Institute of Technology's Institute of Applied Physics.

In his presentation at Additive International 2022, he will review recent progress on 3D and 4D laser printing on the micrometer and nanometer scale. This includes light-responsive metamaterial architectures based on liquid-crystal elastomers, the local director of which we align in situ by means of quasi-static electric fields during the 3D multi-photon printing process. Furthermore, we introduce in-situ diagnostics by means of optical-coherence tomography (joint work with ZEISS). Finally, we report on our efforts on using two-step absorption instead of two-photon absorption. Focus-scanning 3D printing based on one-color two-step absorption allows for democratizing 3D nanoprinting (joint work with Nanoscribe). Projection-based light-sheet 3D printing using two-color two-step absorption supports printing rates approaching 107 voxels/s at voxel volumes below 1 µm3.