We demonstrate the in-plane emission of highly-polarized single photons from an InAs quantum dot embedded into a photonic crystal waveguide. The spontaneous emission rates are Purcell-enhanced by the coupling of the quantum dot to a slow-light mode of the waveguide. Photon-correlation measurements confirm the sub-Poissonian statistics of the in-plane emission. Under optical pulse excitation, single photon emission rates of up to 19 MHz into the guided mode are demonstrated, which corresponds to a device efficiency of 24%. These results herald the monolithic integration of sources in photonic quantum circuits.
@article{arxiv.1201.3475,
title = {On-chip single photon emission from an integrated semiconductor quantum dot into a photonic crystal waveguide},
author = {Andre Schwagmann and Sokratis Kalliakos and Ian Farrer and Jonathan P. Griffiths and Geb A. C. Jones and David A. Ritchie and Andrew J. Shields},
journal= {arXiv preprint arXiv:1201.3475},
year = {2012}
}