Entangled Photons from a Light‐Emitting Diode
Oliver J. Benson · ChemPhysChem · 2010
Current sources for entangled photon pairs rely mostly on spontaneous parametric down-conversion in nonlinear optical crystals. Such sources have the drawback of producing pairs randomly and require powerful optical pump lasers. C. L. Salter et al. have now developed a new source that generates entangled photon pairs on demand under electrical excitation. The device is similar to a classical light-emitting diode (see picture). Its robust and integrated design makes it suitable for applications in quantum information processing.