4.2 Article

Observation of oscillatory Raman gain associated with two-photon Rabi oscillations of nanofiber-coupled atoms

Publisher

IOP Publishing Ltd
DOI: 10.1088/1361-6455/ac9c7b

Keywords

coherent manipulation; three-level system; two-photon Rabi oscillations; Raman gain; nanophotonic interface; nanofiber

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We investigate two-photon Rabi oscillations in quantum emitters with a Λ-type level structure and observe the associated oscillatory Raman gain and absorption. The efficient and homogeneous coupling between atoms and the probe field is achieved through a nanofiber-based optical interface.
Quantum emitters with a ?-type level structure enable numerous protocols and applications in quantum science and technology. Understanding and controlling their dynamics is, therefore, one of the central research topics in quantum optics. Here, we drive two-photon Rabi oscillations between the two ground states of cesium atoms and observe the associated oscillatory Raman gain and absorption that stems from the atom-mediated coherent photon exchange between the two drive fields. The atoms are efficiently and homogeneously coupled with the probe field by means of a nanofiber-based optical interface. We study the dependence of the two-photon Rabi frequency on the system parameters and observe Autler-Townes splitting in the probe transmission spectrum. Beyond shedding light on the fundamental processes underlying two-photon Rabi oscillations, our method could also be used to investigate (quantum) correlations between the two drive fields as well as the dynamical establishment of electromagnetically induced transparency.

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