Equipment and Services
Multiphoton Polymerization
Multiphoton 3D printing works by tightly focusing an ultrafast laser inside a photosensitive resin. Polymerization occurs when the photoinitiator absorbs two or more photons in a shorter time than the time necessary for the initiator to return to its ground state, thus providing enough combined energy to trigger the polymerization reaction.
Because multiphoton absorption scales approximately with the square of the optical intensity, it is strongly confined to the laser focus. Only the microscopic volume equivalent to the focal spot of an objective, called a ‘voxel’, receives sufficient energy to solidify, while material above and below the focus remains largely unaffected. This nonlinear localization enables sub-micrometre features and genuine three-dimensional fabrication.
The printer scans this voxel through the resin according to a digital 3D model, effectively drawing the structure trajectory by trajectory and layer by layer. After exposure, the unpolymerized resin is removed with a solvent during development, leaving behind the solid microstructure.
The main trade-off is between resolution, printing speed, and structural stability.
Offered Services:
- Print Feasibility Studies
- Test Prints
- Project Collaborations
- Training sessions for people interested in long term projects
System photos
Qx Right side view

Qx Front and left side view in yellow light

Last Updated 12.11.2026