DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2005 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

HL: Halbleiterphysik

HL 54: Photonische Kristalle III

HL 54.1: Talk

Tuesday, March 8, 2005, 15:00–15:15, TU P164

Laser Direct Writing of three-dimensional Photonic Crystals in high-index of refraction chalcogenide glasses — •Sean Wong1, Georg von Freymann1, Geoffrey A. Ozin1, Markus Deubel2,3,4 und Martin Wegener2,3,41Materials Chemistry Research Group, Department of Chemistry, University of Toronto, M5S 3H6, Toronto, Canada — 2Institut für Angewandte Physik, Universität Karlsruhe (TH), 76128 Karlsruhe — 3Institut für Nanotechnologie, Forschungszentrum Karlsruhe, 76021 Karlsruhe — 4CFN, Universität Karlsruhe (TH), 76128 Karlsruhe

We present a two-step method for the direct fabrication of high-index of refraction three-dimensional Photonic Crystals.

Direct laser writing [1] in arsenic-sulphur based thin films of chalcogenide glasses with high-intensity 120fs pulses induces a local chemical phase change via two-photon absorption to As2S3. The inscribed three-dimensional Photonic Crystals are subsequently etched out with a specially designed wet chemical etchant. In principle, the index of refraction of As2S3 (n=2.45) is high enough to open a complete band gap in diamond-like crystal structures, e.g. the woodpile structure, although further optimization of the writing process is required to achieve this goal. As our approach does not require any subsequent inversion with high index material, it might prove as a new route for the direct fabrication of functional Photonic Crystals.

[1] M. Deubel et al., Nature Materials 3, 444 (2004)

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2005 > Berlin