New quantum emitters make it to the front cover of ACS Nano! 
In the heart of a hexagonal nanowire, a quantum tube glows, emitting streams of pure single photons.
Researchers from the Nano-spectroscopy group at Sapienza, led by Prof. Marta De Luca, together with researchers from EPFL and University of Basel in Switzerland, the CNR in Trieste and the OPERA group in Sapienza, have achieved a key advance in quantum photonics by creating novel tiny light sources that release one photon at a time. 
The emitters are embedded in ultra-thin dilute nitrides nanowires grown on Silicon. Optical measurements unveiled the high purity of the single-photon emission, with g2(0)=0.04. 
The structures exhibit exceptional crystal quality, a key requirement for quantum performance. This is the first demonstration of quantum emission in GaAsN nanowires. The results mark a major step toward developing on-chip quantum light sources for future quantum photonic circuits compatible with mainstream Si substrates