Two-photon polymerization (2PP) is an advanced 3D nanofabrication technique that uses femtosecond laser pulses to initiate polymerization in a photosensitive material, typically a liquid resin. The process relies on the simultaneous absorption of two photons by a molecule in the resin. This triggers the polymerization only in the area where the laser is focused, allowing for extremely high spatial resolution. 

Femtosecond lasers provide the high intensity needed to achieve two-photon absorption while minimizing thermal damage to the material. Since polymerization occurs only at the focus point, 2PP can create structures with extremely high precision, down to the sub-micron or even nanometer scale. This allows for the fabrication of complex 3D microstructures that are difficult or impossible to achieve with other methods. MPBC’s femtosecond laser suite is the perfect solution for this application because of its ease of use (no bulk optics) and great beam quality.