  Nowadays, integrated photonics is a key technology in quantum information
processing (QIP) but achieving all-optical buses for quantum networks with
efficient integration of single photon emitters remains a challenge. Photonic
crystals and cavities are good candidates but do not tackle how to effectively
address a nanoscale emitter. Using a nanowire nanowaveguide, we realise an
hybrid nanodevice which locally excites a single photon source (SPS). The
nanowire acts as a passive or active sub-wavelength waveguide to excite the
quantum emitter. Our results show that localised excitation of a SPS is
possible and is compared with free-space excitation. Our proof of principle
experiment presents an absolute addressing efficiency {\eta}a = 10-4 only 50%
lower than the one using free-space optics. This important step demonstrates
that sufficient guided light in a nanowaveguide made of a semiconductor
nanowire is achievable to excite a single photon source. We accomplish a hybrid
system offering great potentials for electrically driven SPSs and efficient
single photon collection and detection, opening the way for optimum
absorption/emission of nanoscale emitters. We also discuss how to improve the
addressing efficiency of a dipolar nanoscale emitter with our system.
