title: Ultrafast room temperature single-photon source from nanowire-quantum dots.
abstract: Epitaxial semiconductor quantum dots are particularly promising as realistic single-photon sources for their compatibility with manufacturing techniques and possibility to be implemented in compact devices. Here, we demonstrate for the first time single-photon emission up to room temperature from an epitaxial quantum dot inserted in a nanowire, namely a CdSe slice in a ZnSe nanowire. The exciton and biexciton lines can still be resolved at room temperature and the biexciton turns out to be the most appropriate transition for single-photon emission due to a large nonradiative decay of the bright exciton to dark exciton states. With an intrinsically short radiative decay time (≈300 ps) this system is the fastest room temperature single-photon emitter, allowing potentially gigahertz repetition rates.
authors.affiliation: "Nanophysics and Semiconductor" Group, CNRS-Institut Néel, 25 rue des Martyrs, 38042 Grenoble Cedex 9, France.
authors.forename: S
authors.initials: S
authors.lastname: Bounouar
authors.forename: M
authors.initials: M
authors.lastname: Elouneg-Jamroz
authors.forename: M den
authors.initials: Md
authors.lastname: Hertog
authors.forename: C
authors.initials: C
authors.lastname: Morchutt
authors.forename: E
authors.initials: E
authors.lastname: Bellet-Amalric
authors.forename: R
authors.initials: R
authors.lastname: André
authors.forename: C
authors.initials: C
authors.lastname: Bougerol
authors.forename: Y
authors.initials: Y
authors.lastname: Genuist
authors.forename: J-Ph
authors.initials: JP
authors.lastname: Poizat
authors.forename: S
authors.initials: S
authors.lastname: Tatarenko
authors.forename: K
authors.initials: K
authors.lastname: Kheng
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D008422:Materials Testing; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure*; D017785:Photons; D045663:Quantum Dots; D018036:Selenium Compounds / Q000737:chemistry*; D013696:Temperature; D017967:Zinc Compounds / Q000737:chemistry*
chemical_list: D019187:Cadmium Compounds; D018036:Selenium Compounds; D017967:Zinc Compounds; C058667:cadmium selenide; C044696:zinc selenide