Diamond-based photonic devices offer exceptional opportunity to study cavityQED at room temperature. Here we report fabrication and opticalcharacterization of high quality photonic crystal (PC) microcavities based onnanocrystalline diamond. Fundamental modes near the emission wavelength ofnegatively charged nitrogen-vacancy (N-V) centers (637 nm) with quality factors(Qs) as high as 585 were observed. Three-dimensional Finite-DifferenceTime-Domain (FDTD) simulations were carried out and had excellent agreementwith experimental results in the values of the mode frequencies. Polarizationmeasurements of the modes were characterized; their anomalous behavior providesimportant insights to scattering loss in these structures.
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