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Spectral engineering of cavity-protected polaritons in an atomic ensemble

Our paper, which presents the demonstration of spectral engineering of polaritons in a cold atom cavity system, has recently been published in Nature Physics on Mai 2, 2023. You can read the full paper by accessing it here: https://rdcu.be/dbmX7

In this study, we investigate the influence of strong cavity interactions on the protection of polartions against emitter inhomogeneities, hightlighting the role played by dark states in this system. Leveraging the cavity protection effect, we successfully engineer the spectrum of polaritons, resulting in the generation of polartions with muliple frequencies. This can lead to applications in quantum networks, particularly for shaping single-photon emission. 

Mapping of the microscopic standing-wave field in a fiber Fabry-Perot microcavity with a nanowire probe

Our collaboration with Olivier Arcizet’s group at Institut Neel has allowed mapping of the microscopic standing-wave field in a fiber Fabry-Perot microcavity with a nanowire probe that is sensitive to the field of a single photon. This work just appeared in Physical Review X on 8 April 2021. The CNRS published a News item about this work (in French).