Micro-optics and metasurfaces via multiphoton polymerization

Multiphoton polymerization (MPP) enables maskless 3D printing and has become a cornerstone of high-resolution manufacturing. Its unique combination of flexibility, versatility, and adaptability distinguishes it from conventional lithography, particularly for applications where miniaturization and structural complexity are critical challenges. Today, these aspects are especially relevant in optics and photonics, where the demand for compact and multifunctional devices calls for new strategies of precise light manipulation. This work highlights the capabilities of MPP for realizing advanced applications in the field of optics and photonics. We demonstrate micro- and nanoscale 3D printing for the realization of advanced micro-optics enabling to enhance lateral resolution in optical microscopes, the fabrication of flat optical elements for phase manipulation in the visible spectral range, and the development of metasurface-based optical components to manipulate light across diverse wavelengths regime.