A robust all-solid-state source for single photons

Summary form only given. Summary from only given. The controlled generation of single photons is mandatory for new applications of quantum communication, in particular for truly secure quantum cryptography. Various solutions based on the fluorescence of single atom, ions or organic molecules have been demonstrated already. However, they are either rather difficult to perform, need expensive equipment or can generate only a very limited number of emissions. Here, we present an all-solid-state solution promising low costs and unprecedented stability.