Photo-oxidative tuning of individual and coupled GaAs photonic crystal cavities

Alexander Y. Piggott, Konstantinos G. Lagoudakis, Tomas Sarmiento, Michal Bajcsy, Gary Shambat, Jelena Vučković

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)
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We demonstrate a photo-induced oxidation technique for tuning GaAs photonic crystal cavities using a low-power 390 nm pulsed laser. The laser oxidizes a small (textless 1 μm) diameter spot, reducing the local index of refraction and blueshifting the cavity. The tuning progress can be actively monitored in real time. We also demonstrate tuning an individual cavity within a pair of proximity-coupled cavities, showing that this method can be used to tune individual cavities in a cavity network, with applications in quantum simulations and quantum computing.
Original languageEnglish
Pages (from-to)15017-15023
Number of pages7
JournalOptics Express
Issue number12
Publication statusPublished - 11 Jun 2014


  • microcavities
  • photonic crystals
  • microcavity devices


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