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Titania Woodpiles with Complete Three‐Dimensional Photonic Bandgaps in the Visible
Author(s) -
Frölich Andreas,
Fischer Joachim,
Zebrowski Thomas,
Busch Kurt,
Wegener Martin
Publication year - 2013
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201300896
Subject(s) - materials science , transmittance , photonic crystal , atomic layer deposition , photonics , yablonovite , optoelectronics , visible spectrum , photonic bandgap , polarization (electrochemistry) , band gap , optics , spectroscopy , laser , layer (electronics) , photonic integrated circuit , nanotechnology , chemistry , physics , quantum mechanics
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.