  Quantum emitters radiate light omni-directionally, making it hard to collect
and use the generated photons. Here we propose a 3D metal-dielectric parabolic
antenna surrounding an individual quantum dot as a source of collimated single
photons which can then be easily extracted and manipulated. Our fabrication
method relies on a single optically-induced polymerization step, once the
selected emitter has been localized by confocal microscopy. Compared to
conventional nano-antennas, our geometry does not require near-field coupling
and it is therefore very robust against misalignment issues, and minimally
affected by absorption in the metal. The parabolic antenna provides one of the
largest reported experimental directivities (D=106) and the lowest beam
divergences ({\Theta}=13.5 deg), a broadband operation over all the visible and
near-IR range, together with more than 96% extraction efficiency, offering a
practical advantage for quantum technological applications.
