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Observation of whispering gallery modes in nanocrystalline diamond microdisks
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 w...
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Published in: | Applied physics letters 2007-02, Vol.90 (8), p.081110-081110-3 |
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Main Authors: | , , , , , |
Format: | Article |
Language: | English |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | 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
∼
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. |
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ISSN: | 0003-6951 1077-3118 |
DOI: | 10.1063/1.2709626 |