Figure 5: Plasmon-NV coupling in a hybrid ND–Ag nanostructure with 5.0 nm Ag nanoparticles.

(a), A two-dimensional fluorescence image of hybrid ND–Ag nanostructures. Scale bar, 10 μm. (b) Typical autocorrelation (g(2)(τ)) plots of pure ND (circle) and hybrid ND–Ag nanostructure (square). Solid red and blue curves are bi-exponential decay fit to data of ND and ND–Ag, respectively (see Methods). Both data were acquired from the NDs containing same amount of NV centres (six).