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Local tuning of photonic crystal cavities using chalcogenide glasses

Faraon, Andrei; Englund, Dirk; Bulla, Douglas; Luther-Davies, Barry; Eggleton, Benjamin J.; Stoltz, Nick; Petroff, Pierre; Vuckovic, Jelena


We demonstrate a method to locally change the refractive index in planar optical devices by photodarkening of a thin chalcogenide glass layer deposited on top of the device. The method is used to tune the resonance of GaAs-based photonic crystal cavities by up to 3 nm at 940 nm, with only 5% deterioration in cavity quality factor. The method has broad applications for postproduction tuning of photonic devices.

CollectionsANU Research Publications
Date published: 2008
Type: Journal article
Source: Applied Physics Letters
DOI: 10.1063/1.2839308


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