Figure 2
From: Atom–Photon Coupling from Nitrogen-vacancy Centres Embedded in Tellurite Microspheres
Q dependence on density of the embedded NDs.
(a) SEM image of a tellurite sphere with 41 μm diameter and embedded NDs. (b) Magnified area of the sphere surface indicated by dashed lines. Five regions were identified as indicated. Element compositions of Regions 1 and 2 were analysed by EDX and Regions 3 to 5 bright spots corresponding to unembedded NDs. Its measured ND surface density was 11/μm2. (c) EDX spectra showing the measured element compositions of region 1 and background region 2 in (b). (d)-(f) SEM images of magnified sphere surfaces for three other spheres with measured ND surface densities of 104/μm2, 14/μm2 and 3/μm2, respectively.
