摘要
Optical cavities create regions of high field intensity, which can be used for selective spectral enhancement of emitters such as the nitrogen vacancy center (NV) in diamond. This report discusses a hybrid metal diamond photonic crystal cavity, which provides greater localization of the electric field than dielectric cavities and mitigates metal-related losses in existing plasmonic structures. We fabricated such hybrid structures using silver and single-crystal diamond and observed emission enhancement of NVs near the diamond surface. We measured a mode quality factor (Q) as high as 170 with a simulated mode volume of similar to 0.1 (lambda/n)(3) and demonstrated its tunability. This cavity design and the associated fabrication approach specifically target enhancement of emission from nearsurface NVs.
- 出版日期2015-4