title: Titania woodpiles with complete three-dimensional photonic bandgaps in the visible.
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.
authors.affiliation: DFG-Center for Functional Nanostructures CFN, Karlsruhe Institute of Technology KIT, Wolfgang-Gaede-Straße 1, 76131 Karlsruhe, Germany. andreas.froelich@kit.edu
authors.forename: Andreas
authors.initials: A
authors.lastname: Frölich
authors.forename: Joachim
authors.initials: J
authors.lastname: Fischer
authors.forename: Thomas
authors.initials: T
authors.lastname: Zebrowski
authors.forename: Kurt
authors.initials: K
authors.lastname: Busch
authors.forename: Martin
authors.initials: M
authors.lastname: Wegener
keywords: atomic layer deposition; lithography; nanophotonics; photonic crystals; titanium dioxide