title: Influence of metal deposition on exciton-surface plasmon polariton coupling in GaAs/AlAs/GaAs core-shell nanowires studied with time-resolved cathodoluminescence.
abstract: The coupling of excitons to surface plasmon polaritons (SPPs) in Au- and Al-coated GaAs/AlAs/GaAs core-shell nanowires, possessing diameters of ~100 nm, was probed using time-resolved cathodoluminescence (CL). Excitons were generated in the metal coated nanowires by injecting a pulsed high-energy electron beam through the thin metal films. The Purcell enhancement factor (FP) was obtained by direct measurement of changes in the temperature-dependent radiative lifetime caused by the nanowire exciton-SPP coupling and compared with a model that takes into account the dependence of FP on the distance from the metal film and the thickness of the film covering the GaAs nanowires.
authors.affiliation: Department of Physics and The Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel.
authors.forename: Yevgeni
authors.initials: Y
authors.lastname: Estrin
authors.forename: Daniel H
authors.initials: DH
authors.lastname: Rich
authors.forename: Andrey V
authors.initials: AV
authors.lastname: Kretinin
authors.forename: Hadas
authors.initials: H
authors.lastname: Shtrikman
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D001152:Arsenicals / Q000737:chemistry*; D004566:Electrodes; D005708:Gallium / Q000737:chemistry*; D049449:Luminescence; D053770:Nanowires / Q000737:chemistry*; D020349:Surface Plasmon Resonance
chemical_list: D001152:Arsenicals; C043055:gallium arsenide; D005708:Gallium; D000535:Aluminum