7 March 2014 Three-dimensional nanostructuring of polymer materials by controlled avalanche using femtosecond laser pulses
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Abstract
We report direct laser fabrication of free-standing 3D structures in a sol-gel photo-polymer SZ2080, poly(ethylene glycol) diacrylate (PEG-DA-700) and thermo-polymer polydimethylsiloxane (PDMS) without use of two-photon absorbing photo-sensitizers. By estimating the multi-photon and avalanche ionization rates in the focal volume it is shown that bulk structuring of pure materials was achieved via a controlled avalanche. It is shown that several non-photosesitized materials can be combined for fabrication of composite material structures evoking a possibility to create non-toxic biocompatible scaffolds for tissue engineering, transparent microoptical elements and higher damage threshold photonic devices.
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Sima Rekštytė, Linas Jonušauskas, Albertas Žukauskas, Gediminas Gervinskas, Mangirdas Malinauskas, Saulius Juodkazis, "Three-dimensional nanostructuring of polymer materials by controlled avalanche using femtosecond laser pulses", Proc. SPIE 8972, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XIV, 89721O (7 March 2014); doi: 10.1117/12.2040971; https://doi.org/10.1117/12.2040971
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