Sarah Thomas is a research fellow in the Photonic Quantum Information group at Imperial College London. Sarah obtained her PhD from Imperial College London working on optical quantum memories in warm atomic ensembles, which are key devices for the scalability of optical quantum technologies. Sarah was a postdoctoral researcher in Paris for 2 years, working on quantum dot based single-photon sources and their applications in photonic quantum technologies. Since 2022 Sarah has been an Imperial College Research Fellow and is working on optimising quantum memories and interfacing them with quantum dot single-photon sources.
Abstract:
Deterministic Storage and Retrieval of Telecom Light from a Quantum Dot Single-Photon Source Interfaced with an Atomic Quantum Memory
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 light 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 light field is 18.2 ± 0.6, limited only by detector dark counts.
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