Journal
OPTICS EXPRESS
Volume 16, Issue 24, Pages 20073-20080Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.16.020073
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Funding
- Australian Research Council
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A method is reported for improving the spatial resolution and engineering the stop gaps of the inorganic-organic 3D woodpile photonic crystals (PhCs). The approach is based on the two-photon polymerization (2PP) of an inorganic-organic hybrid material and a post-thermal treatment (PTT) process. The effects of PTT on polymerized 1D, 2D and 3D structures have been characterized. Ultimately, the feature size of the suspended rods has been reduced to similar to 33 nm and the spatial resolution of inorganic-organic 3D woodpile PhCs has been improved from similar to 150 nm to similar to 86 nm. The approach is also demonstrated as a powerful tool to engineer the stop gaps of 3D PhCs. In particular, a combination of PTT and the threshold fabrication technique leads to the stop gap of a 3D woodpile PhC that can be tuned over a large wavelength range of similar to 318 nm from the near-infrared to visible region. (C) 2008 Optical Society of America
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