Semiconductor single photon devices for quantum information processing

We present our recent progress in the development of semiconductor devices for photonic quantum information processing. We demonstrate the first electrically driven quantum dot entangled light source as well as a device in which we are able to tune the exciton spin splitting in order to generate entangled photon pairs. A practical and high-speed photon number detector based on a fast-gated silicon avalanche photodiode is also shown. © 2011 American Institute of Physics