Scalable photonic quantum technologies require on-demand single-photon sources with simultaneously high levels of purity, indistinguishability, and efficiency. These key features, however, have only been demonstrated separately in previous experiments. Here, by s-shell pulsed resonant excitation of a Purcell-enhanced quantum dot-micropillar system, we deterministically generate resonance fluorescence single photons which, at pi pulse excitation, have an extraction efficiency of 66%, single-photon purity of 99.1%, and photon indistinguishability of 98.5%. Such a single-photon source for the first time combines the features of high efficiency and near-perfect levels of purity and indistinguishabilty, and thus open the way to multi-photon experiments with semiconductor quantum dots.
@article{arxiv.1601.00284,
title = {On-Demand Single Photons with High Extraction Efficiency and Near-Unity Indistinguishability from a Resonantly Driven Quantum Dot in a Micropillar},
author = {Xing Ding and Yu He and Z. -C. Duan and Niels Gregersen and M. -C. Chen and S. Unsleber and S. Maier and Christian Schneider and Martin Kamp and Sven Höfling and Chao-Yang Lu and Jian-Wei Pan},
journal= {arXiv preprint arXiv:1601.00284},
year = {2016}
}
Comments
submitted to PRL on 29/09/2015, accepted on 01/12/2015, published on 14/01/2016, the first work reporting an "all-around" single-photon source that combines purity, indistinguishability, and efficiency. see https://aps.altmetric.com/details/4994109