Ultrashort pulsed laser light facilitates multiphoton-excited photophysical and photochemical processes. High peak intensities confine reactions to the centre of the focal spot and allow direct laser writing of microstructures in three dimensions. We present two methods based on photosensitive polymer materials and high-resolution optical microscopy, which permit the fast and efficient generation of photonic crystals with bandgaps in the near and mid-infrared spectral region. Two-photon photopolymerization relies on the initiation of a polymerization reaction in the scanning laser focus and results in arbitrarily shaped microgratings of submicron-size structural elements. Femtosecond laser drilling in solid polymer blocks is based on microexplosions in the moving laser focus resulting in void channels with submicron diameters. Both techniques provide highly correlated structural arrangements, which allow for the observation and optimization of higher-order stop gaps.
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1st Pacific International Conference on Laser Materials Processing, Micro, Nano and Ultrafast Fabrication
April 19–21, 2004
Melbourne, Australia
ISBN:
978-0-912035-76-5
PROCEEDINGS PAPER
Femtosecond fabrication of three-dimensional photonic crystals in polymers
M. Straub;
M. Straub
Centre for Micro-Photonics and Centre for Ultrahigh-Bandwidth Devices for Optical Systems, School of Biophysical Sciences and Electrical Engineering, Swinburne University of Technology
, Hawthorn, Victoria 3122, Australia
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M. Ventura;
M. Ventura
Centre for Micro-Photonics and Centre for Ultrahigh-Bandwidth Devices for Optical Systems, School of Biophysical Sciences and Electrical Engineering, Swinburne University of Technology
, Hawthorn, Victoria 3122, Australia
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M. Gu
M. Gu
Centre for Micro-Photonics and Centre for Ultrahigh-Bandwidth Devices for Optical Systems, School of Biophysical Sciences and Electrical Engineering, Swinburne University of Technology
, Hawthorn, Victoria 3122, Australia
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Published Online:
April 01 2004
Citation
M. Straub, M. Ventura, M. Gu; April 19–21, 2004. "Femtosecond fabrication of three-dimensional photonic crystals in polymers." Proceedings of the 1st Pacific International Conference on Laser Materials Processing, Micro, Nano and Ultrafast Fabrication. PICALO 2004: 1st Pacific International Conference on Laser Materials Processing, Micro, Nano and Ultrafast Fabrication. Melbourne, Australia. (pp. P705). ASME. https://doi.org/10.2351/1.5056166
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