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dc.contributor.authorGhosh, Megha-
dc.contributor.authorKarigowda, Asha-
dc.contributor.authorJayaraman, Ayyappan-
dc.contributor.authorBretenaker, Fabien-
dc.contributor.authorSanders, Barry C-
dc.contributor.authorNarayanan, Andal-
dc.identifier.citationJournal of Physics B Atomic Molecular and Optical Physics, 2017, Vol.50, p165502en_US
dc.identifier.issn1361-6455 (Online)-
dc.descriptionRestricted Access.en_US
dc.description.abstractWe present an experimental study of a Δ system in a room temperature, dilute sample of 85Rb atoms. A Δ system in the D2 manifold of 85Rb is formed by connecting the two lower hyperfine energy levels of a Λ system by a microwave drive field at 3.0357 GHz. We show that when the Rabi frequency of a microwave drive field exceeds that of the optical probe field, a three-wave mixing nonlinear interaction is established. This nonlinear interaction changes the enhanced transmission of the optical probe to a deep absorption for a relative phase difference of π between all the three fields. We establish through our experiment and our numerical simulation, the phase-sensitive and nonlinear nature of the Δ system's response to the applied microwave and optical fields. Using this feature, we demonstrate a high-contrast microwave phase controlled switch for the optical probe field. In comparison with intensity and phase switching demonstrated with all-optical fields so far, our experiment opens up the possibility of obtaining the highest contrast optical switching with room temperature atoms.en_US
dc.publisherIOP Publishing Ltd.en_US
dc.rights2017 IOP Publishing Ltd.en_US
dc.subjectCoherent atomic-field interactions effectsen_US
dc.subjectelectromagnetically induced transparencyen_US
dc.titleDemonstration of a high-contrast optical switching in an atomic Delta system.en_US
Appears in Collections:Research Papers (LAMP)

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