title: Dynamically controlling the emission of single excitons in photonic crystal cavities.
abstract: Single excitons in semiconductor microcavities represent a solid state and scalable platform for cavity quantum electrodynamics, potentially enabling an interface between flying (photon) and static (exciton) quantum bits in future quantum networks. While both single-photon emission and the strong coupling regime have been demonstrated, further progress has been hampered by the inability to control the coherent evolution of the cavity quantum electrodynamics system in real time, as needed to produce and harness charge-photon entanglement. Here using the ultrafast electrical tuning of the exciton energy in a photonic crystal diode, we demonstrate the dynamic control of the coupling of a single exciton to a photonic crystal cavity mode on a sub-nanosecond timescale, faster than the natural lifetime of the exciton. This opens the way to the control of single-photon waveforms, as needed for quantum interfaces, and to the real-time control of solid-state cavity quantum electrodynamics systems.
authors.affiliation: Applied Physics Department, COBRA Research Institute, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.
authors.forename: Francesco
authors.initials: F
authors.lastname: Pagliano
authors.affiliation: Applied Physics Department, COBRA Research Institute, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.
authors.forename: YongJin
authors.initials: Y
authors.lastname: Cho
authors.affiliation: Applied Physics Department, COBRA Research Institute, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.
authors.forename: Tian
authors.initials: T
authors.lastname: Xia
authors.affiliation: Applied Physics Department, COBRA Research Institute, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.
authors.forename: Frank
authors.initials: F
authors.lastname: van Otten
authors.affiliation: 1] Applied Physics Department, COBRA Research Institute, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands [2] Max-Planck-Institute for the Physics of Complex Systems, Nöthnitzer Straße 38, 01187 Dresden, Germany.
authors.forename: Robert
authors.initials: R
authors.lastname: Johne
authors.affiliation: Applied Physics Department, COBRA Research Institute, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.
authors.forename: Andrea
authors.initials: A
authors.lastname: Fiore