Abstract
Multi-photon polymerization using interference of several laser beams is a promising technique for mass fabrication of 3D periodic micro-structures over large areas, which can be used in micro-biology (artificial scaffolds), photonics (photonics crystals), micro-optics (micro-lenses). While the direct laser writing (DLW) approach is a relatively slow process, use of the interference field can be a significantly faster alternative route of parallel processing when periodic structures are produced by a single laser exposure. We present examples of scaffolds and micro-lens arrays fabricated over a large area by multi-photon polymerization in a negative ultra low shrinkage and biocompatible photopolymer SZ2080 (ORMOSIL) using four-beam interference of a femtosecond laser.
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