Towards an Electro-Optically Driven

As a prototype towards a single photon source we present a quantum-dot-based device, which is tunable and fully electrically pumped.Both the electrical pumping process and the manipulation of the emission wavelength of the quantum dots are independently achieved in this three-terminal device. We realized this approach by electro-optically pumping the quantum dots via a light-emitting diode which is monolithically integrated under- neath the quantum dot layer. Independently from the pumping process, electrical tuning of the emission wavelength of the quan- tum dots is achieved by the quantum confined Stark effect using a third contact. This device structure is fully extensible with high quality resonators based, for instance, on photonic crystal struc- tures targeting high extraction efficiencies via the Purcell effect.