Optical control of a single donor electron spin in ZnSe

An electron bound to a single chlorine donor impurity in ZnSe can serve as a solid-state spin qubit, offering long spin coherence time due to low nuclear spin noise and excellent optical emission properties. Previous studies have shown that these donors can couple to donor-bound exciton states, enabling bright single photon emission. Moreover, resonant excitation of the bound exciton allows selective optical pumping of the quantum state while mainteining system coherence. In this presentation, we present experimental results demonstrating optical initialization, readout, and coherent control of a single donor electron spin. These results enable the ZnSe:Cl donor system as a promising candidate for spin-photon interfaces, which can be applied to scalable quantum information technologies.