title: Evidence for coupling between exciton emissions and surface plasmon in Ni-coated ZnO nanowires.
abstract: We show that coating ZnO nanowires (NWs) with a transition metal, such as Ni, can increase the efficiency of light emission at room temperature. Based on detailed structural and optical studies, this enhancement is attributed to energy transfer between near-band-edge emission in ZnO and surface plasmons in the Ni film which leads to an increased rate of the spontaneous emission. It is also shown that the Ni coating leads to an enhanced non-radiative recombination via surface states, which becomes increasingly important at low measurement temperatures and in annealed ZnO/Ni NWs.
authors.affiliation: Department of Physics, Chemistry and Biology, Linköping University 58183, Linköping, Sweden.
authors.forename: Q J
authors.initials: QJ
authors.lastname: Ren
authors.forename: S
authors.initials: S
authors.lastname: Filippov
authors.forename: S L
authors.initials: SL
authors.lastname: Chen
authors.forename: M
authors.initials: M
authors.lastname: Devika
authors.forename: N
authors.initials: N
authors.lastname: Koteeswara Reddy
authors.forename: C W
authors.initials: CW
authors.lastname: Tu
authors.forename: W M
authors.initials: WM
authors.lastname: Chen
authors.forename: I A
authors.initials: IA
authors.lastname: Buyanova
mesh_terms: D008027:Light; D053770:Nanowires / Q000737:chemistry* / Q000648:ultrastructure; D009532:Nickel / Q000737:chemistry*; D013059:Spectrum Analysis, Raman; D013997:Time Factors; D014961:X-Ray Diffraction; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D009532:Nickel; D015034:Zinc Oxide