Design of flexible ultrahigh-Q microcavities in diamond-based photonic crystal slabs

Details Design of flexible ultrahigh-Q microcavities in diamond-based photonic crystal slabs Design of flexible ultrahigh-Q microcavities in diamond-based photonic crystal slabs

2008-12-10

arxiv.org/abs/0812.1822v1

Physics

Quantum Physics

9 pages, 4 figures (1 in colour)

Scientific paper

We design extremely flexible ultrahigh-Q diamond-based double-heterostructure photonic crystal slab cavities by modifying the refractive index of the diamond. The refractive index changes needed for ultrahigh-Q cavities with $Q ~ 10^7$, are well within what can be achieved ($\Delta n \sim 0.02$). The cavity modes have relatively small volumes $V<2 (\lambda /n)^3$, making them ideal for cavity quantum electro-dynamic applications. Importantly for realistic fabrication, our design is flexible because the range of parameters, cavity length and the index changes, that enables an ultrahigh-Q is quite broad. Furthermore as the index modification is post-processed, an efficient technique to generate cavities around defect centres is achievable, improving prospects for defect-tolerant quantum architectures.

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