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M. Hermatschweiler, A. Ledermann, G. A. Ozin, M. Wegener and G. von Freymann Fabrication of Silicon Inverse Woodpile Photonic Crystals Advanced Functional Materials 17

Version of Record online: 17 AUG 2007 | DOI: 10.1002/adfm.200601074

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Silicon inverse woodpile photonic crystals (see figure) are reported for the first time. Direct laser writing of polymeric templates and a novel silicon single-inversion procedure leads to high-quality structures, with gap/midgap ratios of 14.2 % centered at a wavelength of 2.5 μm. Theoretical calculations suggest that the preparation method can be extended to afford inverse woodpile structures with photonic bandgaps near telecommunication wavelengths.

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