In-plane emission of indistinguishable photons generated by an   integrated quantum emitter
  We demonstrate the emission of indistinguishable photons along a semiconductor chip originating from carrier recombination in an InAs quantum dot. The emitter is integrated in the waveguiding region of a photonic crystal structure, allowing for on-chip light propagation. We perform a Hong-Ou-Mandel-type of experiment with photons collected from the exit of the waveguide and we observe two-photon interference under continuous wave excitation. Our results pave the way for the integration of quantum emitters in advanced photonic quantum circuits. 
Sokratis Kalliakos, Yarden Brody, Andre Schwagmann, Anthony J.   Bennett, Martin B. Ward, David J. P. Ellis, Joanna Skiba-Sz...
physics.optics