A highly efficient single-photon source based on a quantum dot in a photonic nanowire

A single photon source is demonstrated by Claudon et al (Nanophysique et semiconducteurs), in Nature Photonics using a GaAs quantum wire (2.5 um x 200 nm). The source efficiency was found to be 0.72. To enhance the extraction of light, the wire was grown on a metal (Au)-dielectric (silica) and the tip of the wire was made taper. The Photoluminescence showed bi-excitonic line with higher optical pumping. I think this is an interesting article! Those who are interested have a look:

http://www.nature.com/nphoton/journal/v4/n3/abs/nphoton.2009.287.html