Faraon, AndreiEnglund, DirkBulla, DouglasLuther-Davies, BarryEggleton, Benjamin JStoltz, NickPetroff, PierreVuckovic, Jelena2015-12-10May 4-9 209781557528599http://hdl.handle.net/1885/51736We developed a method to locally tune refractive index in photonic crystals. The technique, based on photodarkening of chalcogenide glasses, enables 3nm resonance tuning of GaAs photonic crystal cavities operating at 940nm.Keywords: Chalcogenide glasses; Electro-optics; Laser science; Photonic crystal cavities; Crystal atomic structure; Crystallography; Electron optics; Glass; Lasers; Optical properties; Optical resonators; Photonics; Powders; Quantum electronics; Refractive index; S200810.1109/CLEO.2008.45513612015-12-09