an alkali atom, and the fact that it is embedded in a robust optoelectronic material make it an attractive candidate as a quantum light source. As an individual two-level system, the QD naturally emits one photon when it is excited and collection of this photon can be very efficient by proper design of the surrounding dielectric [@ref:Strauf_NPhot; @ref:Claudon; @ref:Davanco_APL_11]. Single photon count rates can in principle approach 1 GHz, with higher rates possible by taking advantage of a Purcell enhancement. In addition, QDs have been shown to emit polarization entangled photons by means of a cascaded decay [@ref:Stevenson_Nat_06; @ref:Muller_PRL_09]. Finally, QD-generated photons can have a high degree of indistinguishability [@ref:Ates_PRL09; @ref:He_Nnano_2013]. Aside from these optical properties, the internal spin states of charged quantum dots have received considerable attention for quantum information processing [@ref:Atature_Sci_06; @ref:Gerardot_Nat; @ref:deGreve_NPhys_11]. Spin coherence times as along as 1 $\mu$s have been measured [@ref:Brunner_Sci_09] and because the spin state can be entangled with the polarization of an emitted photon [@ref:Simon_PRB_07; @ref:DeGreve_Nat_12; @ref:Gao_Nat_12], charged quantum dots are a natural candidate for a solid-state qubit that interacts strongly with light.

While QDs are promising sources of single or entangled photons, they must be coupled to a high quality quantum 