A hybrid interface of solid state single-photon sources and atomic quantum memories is a long sought-after goal in photonic quantum technologies. Here we demonstrate deterministic storage and retrieval of photons from a semiconductor quantum dot in an atomic ensemble quantum memory at telecommunications wavelengths. We store single photons from an InAs quantum dot in a high-bandwidth rubidium vapour based quantum memory, with a total internal memory efficiency of (12.9±0.4)%. The signal-to-noise ratio of the retrieved photons is 18.2±0.6, limited only by detector dark counts. This demonstration paves the way to quantum technologies that rely on distributed entanglement, and is especially suited for photonic quantum networks.
@article{arxiv.2303.04166,
title = {Deterministic Storage and Retrieval of Telecom Quantum Dot Photons Interfaced with an Atomic Quantum Memory},
author = {S. E. Thomas and L. Wagner and R. Joos and R. Sittig and C. Nawrath and P. Burdekin and T. Huber-Loyola and S. Sagona-Stophel and S. Höfling and M. Jetter and P. Michler and I. A. Walmsley and S. L. Portalupi and P. M. Ledingham},
journal= {arXiv preprint arXiv:2303.04166},
year = {2023}
}