Wavelength conversion at the single-photon level is required to forge a quantum network from distinct quantum devices. Such devices include solid-state emitters of single or entangled photons, as well as network nodes based on atoms or ions. Here we demonstrate the conversion of single photons emitted from a III-V semiconductor quantum dot at 853nm via sum frequency conversion to the wavelength of the strong transition of Yb ions at 370nm. We measure the second-order correlation function of both the unconverted and of the converted photon and show that the single-photon character of the quantum dot emission is preserved during the conversion process.
@article{arxiv.2112.11529,
title = {Converting single photons from an InAs/GaAs quantum dot into the ultraviolet: preservation of second-order correlations},
author = {Anica Hamer and David Fricker and Marcel Hohn and Paola Atkinson and Mihail Lepsa and Stefan Linden and Frank Vewinger and Beata Kardynal and Simon Stellmer},
journal= {arXiv preprint arXiv:2112.11529},
year = {2022}
}