2-photon polymerization is a generative process with possible line widths and heights below the diffraction limit. Due to the physical effect of two-photon absorption in a photosensitive polymer, almost any geometry can be generated. This is done by a relative movement between a focused laser beam and the sample, consisting of a substrate and liquid photopolymer. The polymer cross-links exclusively in a volumetric pixel, the so-called voxel, within the laser focus.
Depending on the laser power set and the polymer used, line widths from 150 nm and line heights from 400 nm are possible; the resolution of the positioning table is 5 nm. In order to produce structures in up to three dimensions, the paths to be scanned by the laser are specified by a file. The Fraunhofer IPT uses the "Photonic Professional GT" device from Nanoscribe GmbH.
More efficient light control, projection of certain lettering and reduction of imaging errors, for example for LED lighting applications in the automotive industry or on buildings. Integration into an established process chain for molding is possible.