Optically controlled initialization and read-out of an electron spin bound to a fluorine donor in ZnSe

• Photon anti-bunching from an independently triggered ZnMgSe/ZnSe QWs nanostructure.
• Optically controllable lambda system confirmed by g-factors of h-hole and electron.
• Single electron spin initialization by resonant optical pumping of one arm.
• Optical pumping in all four optical transitions showing the fully-connected nature.

Here we report photon antibunching and magneto-spectroscopy of a single electron spin bound to a fluorine donor in a ZnMgSe/ZnSe QW nanostructure. The results confirm the presence of an optically controllable lambda-system which allows the optical manipulation of the electron bound to the neutral fluorine donor as a spin qubit. Moreover, we achieved optical spin pumping of the qubit by resonant excitation of each of the four allowed transitions of the lambda system. We verified the spin transfer by detecting single photons when the bound electron decays into the opposite spin state. The results presented here constitutes an elegant initialization and the read-out procedure of the electron spin qubit bound to a fluorine donor which are prerequisite for coherent optical control of an impurity based solid-state spin qubit.