title: Reversible optical memory for twisted photons.
abstract: We report on an experiment in which orbital angular momentum (OAM) of light is mapped at the single-photon level into and out of a cold atomic ensemble. Based on the dynamic electromagnetically induced transparency protocol, the demonstrated optical memory enables the reversible mapping of Laguerre-Gaussian modes with preserved handedness of the helical phase structure. The demonstrated capability opens the possibility to the storage of qubits encoded as superpositions of OAM states and to multidimensional light matter interfacing.
authors: Laboratoire Kastler Brossel, Université Pierre et Marie Curie, Ecole Normale Supérieure, CNRS, Paris, France.
authors: L
authors: L
authors: Veissier
authors: A
authors: A
authors: Nicolas
authors: L
authors: L
authors: Giner
authors: D
authors: D
authors: Maxein
authors: A S
authors: AS
authors: Sheremet
authors: E
authors: E
authors: Giacobino
authors: J
authors: J
authors: Laurat