Journal
APPLIED PHYSICS LETTERS
Volume 90, Issue 8, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2709626
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Nanocrystalline diamond microdisks have been fabricated and characterized. The process conditions were chosen to ensure smooth and vertical sidewalls. Focused ion beam milling was used to create ultrasmooth sidewalls. Whispering gallery modes were observed near the nitrogen-vacancy center emission wavelength (637 nm) by photoluminescence and near similar to 1550 nm by evanescent fiber coupling. The cavity quality factors (Q) are about 100 in both experiments. The Q's for these disks were calculated to be as high as 10(5) by three-dimensional finite-difference time-domain simulations. The authors believe the Q's to be limited by absorption and scattering within the nanocrystalline cavity material. (c) 2007 American Institute of Physics.
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