A. Frölich, J. Fischer, T. Zebrowski, K. Busch, and M. Wegener

 Adv. Mater. 25, 3588-3592 (2013)

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.