  Hybrid plasmonic nanoemitters based on the combination of quantum dot
emitters (QD) and plasmonic nanoantennas open up new perspectives in the
control of light. However, precise positioning of any active medium at the
nanoscale constitutes a challenge. Here, we report on the optimal overlap of
antenna's near-field and active medium whose spatial distribution is controlled
via a plasmon-triggered 2-photon polymerization of a photosensitive formulation
containing QDs. Au nanoparticles of various geometries are considered. The
response of these hybrid nano-emitters is shown to be highly sensitive to the
light polarization. Different light emission states are evidenced by
photoluminescence measurements. These states correspond to
polarization-sensitive nanoscale overlap between the exciting local field and
the active medium distribution. The decrease of the QD concentration within the
monomer formulation allows trapping of a single quantum dot in the vicinity of
the Au particle. The latter objects show polarization-dependent switching in
the single-photon regime.
