Single-photon sources based on solid-state quantum emitters, capable of operating at room temperature, could be employed in on-chip quantum computing applications and as a source of “flying” quantum bits (qubits) for quantum communication. Producing such emitters at precisely pre-defined positions is no easy task, however. Now, a team at the Massachusetts Institute of Technology (MIT) and Sandra National Laboratories in New Mexico together with a team at Harvard University has made atom-like single silicon-vacancy (SiV) centres in diamond photonic nanostructures that emit a string of coherent single photons. The SiV centres can be positioned with nanoscale precision in the diamond structures. Being able to produce quantum emitters in this way is an important step forward in the development of scalable quantum optical devices, say the researchers………
http://nanotechweb.org/cws/article/tech/68544
