We demonstrate the emission and routing of single photons along a semiconductor chip originating from carrier recombination in an actively positioned InAs quantum dot. Device scale arrays of quantum dots are formed by a two step regrowth process. We precisely locate the propagating region of a unidirectional photonic crystal waveguide with respect to the quantum dot nucleation site. Under pulsed optical excitation, the multiphoton emission probability from the exit of the waveguide is 12 \pm 5 % before any background correction. Our results are a major step towards the deterministic integration of a quantum emitter with the waveguiding components of photonic quantum circuits.
@article{arxiv.1403.3221,
title = {On-chip generation and guiding of quantum light from a site-controlled quantum dot},
author = {Ayesha Jamil and Joanna Skiba-Szymanska and Sokratis Kalliakos and Andre Schwagmann and Martin B. Ward and Yarden Brody and David J. P. Ellis and Ian Farrer and Jonathan P. Griffiths and Geb A. C. Jones and David A. Ritchie and Andrew J. Shields},
journal= {arXiv preprint arXiv:1403.3221},
year = {2014}
}