  Integrated quantum optical hybrid devices consist of fundamental constituents
such as single emitters and tailored photonic nanostructures. A reliable
fabrication method requires the controlled deposition of active nanoparticles
on arbitrary nanostructures with highest precision. Here, we describe an easily
adaptable technique that employs picking and placing of nanoparticles with an
atomic force microscope combined with a confocal setup. In this way, both the
topography and the optical response can be monitored simultaneously before and
after the assembly. The technique can be applied to arbitrary particles. Here,
we focus on nanodiamonds containing single nitrogen vacancy centers, which are
particularly interesting for quantum optical experiments on the single photon
and single emitter level.
