title: All-optical switch and transistor gated by one stored photon.
abstract: The realization of an all-optical transistor, in which one "gate" photon controls a "source" light beam, is a long-standing goal in optics. By stopping a light pulse in an atomic ensemble contained inside an optical resonator, we realized a device in which one stored gate photon controls the resonator transmission of subsequently applied source photons. A weak gate pulse induces bimodal transmission distribution, corresponding to zero and one gate photons. One stored gate photon produces fivefold source attenuation and can be retrieved from the atomic ensemble after switching more than one source photon. Without retrieval, one stored gate photon can switch several hundred source photons. With improved storage and retrieval efficiency, our work may enable various new applications, including photonic quantum gates and deterministic multiphoton entanglement.
authors.affiliation: Department of Physics and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
authors.forename: Wenlan
authors.initials: W
authors.lastname: Chen
authors.forename: Kristin M
authors.initials: KM
authors.lastname: Beck
authors.forename: Robert
authors.initials: R
authors.lastname: Bücker
authors.forename: Michael
authors.initials: M
authors.lastname: Gullans
authors.forename: Mikhail D
authors.initials: MD
authors.lastname: Lukin
authors.forename: Haruka
authors.initials: H
authors.lastname: Tanji-Suzuki
authors.forename: Vladan
authors.initials: V
authors.lastname: Vuletić