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Advanced Materials

Titania Woodpiles with Complete Three-Dimensional Photonic Bandgaps in the Visible

Authors

  • Andreas Frölich,

    Corresponding author
    1. DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT), Wolfgang-Gaede-Straße 1, 76131 Karlsruhe, Germany
    2. Institute of Applied Physics and Institute for Nanotechnology (INT), KIT, Wolfgang-Gaede-Straße 1, 76131 Karlsruhe, Germany
    • DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT), Wolfgang-Gaede-Straße 1, 76131 Karlsruhe, Germany.
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  • Joachim Fischer,

    1. DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT), Wolfgang-Gaede-Straße 1, 76131 Karlsruhe, Germany
    2. Institute of Applied Physics and Institute for Nanotechnology (INT), KIT, Wolfgang-Gaede-Straße 1, 76131 Karlsruhe, Germany
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  • Thomas Zebrowski,

    1. DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT), Wolfgang-Gaede-Straße 1, 76131 Karlsruhe, Germany
    2. Institut für Theoretische Festkörperphysik, KIT, Wolfgang-Gaede-Straße 1, 76131 Karlsruhe, Germany
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  • Kurt Busch,

    1. DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT), Wolfgang-Gaede-Straße 1, 76131 Karlsruhe, Germany
    2. Institut für Theoretische Festkörperphysik, KIT, Wolfgang-Gaede-Straße 1, 76131 Karlsruhe, Germany
    3. Institut für Physik, AG Theoretische Optik & Photonik, Humboldt-Universität zu Berlin, Newtonstr. 15, 12489 Berlin
    4. Max-Born-Institut, Max-Born-Strasse 2A, 12489 Berlin, Germany
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  • Martin Wegener

    Corresponding author
    1. DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT), Wolfgang-Gaede-Straße 1, 76131 Karlsruhe, Germany
    2. Institute of Applied Physics and Institute for Nanotechnology (INT), KIT, Wolfgang-Gaede-Straße 1, 76131 Karlsruhe, Germany
    • DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT), Wolfgang-Gaede-Straße 1, 76131 Karlsruhe, Germany.
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Abstract

Titania woodpile photonic crystals are fabricated by a combination of stimulated-emission depletion direct laser writing and a novel titania double-inversion procedure. The procedure relies on atomic-layer deposition, which is also used to fine-tune the template geometry to maximize the gapsize. Angle- and polarization-resolved transmittance spectroscopy and a comparison with theory provide evidence for the first complete photonic bandgap in the visible.

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