High-Q cavities in photosensitive photonic crystals

Snjezana Tomljenovic-Hanic, M. J. Steel, C. Martijn de Sterke, David J. Moss

Research output: Contribution to journalArticlepeer-review

63 Citations (Scopus)


We propose a novel concept for creating high-Q cavities in photonic crystal slabs (PCSs) composed of photosensitive material. To date, high-Q cavities have been realized through the use of double heterostructures where the lattice geometry is altered via nanolithography. Here, we show that selective postexposure to light of a uniform PCS composed of photosensitive material, altering the refractive index permanently, can also yield high-Q microcavities. We show theoretically that high-Q cavities (up to Q=1×106) can be achieved with photoinduced index changes that are well within what can be achieved in chalcogenide glasses.

Original languageEnglish
Pages (from-to)542-544
Number of pages3
JournalOptics Letters
Issue number5
Publication statusPublished - 1 Mar 2007
Externally publishedYes


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