Single photons from solid-state quantum emitters are playing a crucial role in the development of photonic quantum technologies. Higher order states, such as N-photon Fock-states allow for applications e.g. in quantum-enhanced sensing. In this study, we utilize the dispersion of a hot cesium vapor at the D1 lines to realize a temporal delay for one and two-photon Fock-states as a result of the slow-light effect. Single photons are generated on-demand from an InGaAs quantum dot, while their quantum interference at a beam splitter is used to generate a two-photon Fockstate. We verify the successful propagation and temporal delay of both the one and two-photon Fock-states, while a significant delay (5x initial photon length) with simultaneous high transmission (~90 %) is achieved.
@article{arxiv.2010.05570,
title = {Delaying two-photon Fock-states in a hot cesium vapor using on-demand generated single-photons from a semiconductor quantum dot},
author = {Hüseyin Vural and Simon Seyfferle and Ilja Gerhardt and Michael Jetter and Simone L. Portalupi and Peter Michler},
journal= {arXiv preprint arXiv:2010.05570},
year = {2021}
}