  Optical coupling enables intermediate- and long-range interactions between
distant quantum emitters. Such interaction may be the basic element in
bottom-up approaches of coupled spin systems or for integrated quantum
photonics and quantum plasmonics. Here, we prepare nanodiamonds carrying
single, negatively-charged silicon-vacancy centers for evanescent optical
coupling with access to all degrees of freedom by means of atomic force
nanomanipulation. The color centers feature excellent optical properties,
comparable to silicon-vacancy centers in bulk diamond, resulting in a
resolvable fine structure splitting, a linewidth close to the Fourier-Transform
limit under resonant excitation and a good polarization contrast. We determine
the orbital relaxation time $T_{1}$ of the orbitally split ground states and
show that all optical properties are conserved during translational
nanomanipulation. Furthermore, we demonstrate the rotation of the nanodiamonds.
In contrast to the translational operation, the rotation leads to a change in
polarization contrast. We utilize the change in polarization contrast before
and after nanomanipulation to determine the rotation angle. Finally, we
evaluate the likelihood for indistinguishable, single photon emission of
silicon-vacancy centers located in different nanodiamonds. Our work enables
ideal evanescent, optical coupling of distant nanodiamonds containing
silicon-vacancy centers with applications in the realization of quantum
networks, quantum repeaters or complex quantum systems.
