title: Optical dynamics of energy-transfer from a CdZnO quantum well to a proximal Ag nanostructure.
abstract: We studied photoluminescence (PL) and energy-transfer dynamics in a hybrid structure comprising a Cd(0.08)Zn(0.92)O quantum well (QW) and an Ag nanostructure. The observed PL quenching was dependent on the electronic states in the QW. Quenching occurred at low temperature where excited carriers recombined radiatively because of excitonic localization, which disappeared with increasing temperature due to delocalization of excitons. Furthermore, nanostructured Ag surfaces produced local surface plasmon (LSP) absorption that was resonant with the PL peak energy of the QW emission. These results indicate that the recombination energy of excitons transfers nonradiatively to induce LSP excitation, which was revealed using time-resolved PL measurements.
authors.affiliation: Department of Bioengineering, School of Engineering, University of Tokyo, Tokyo 113-8656, Japan. hiroaki@ee.t.u‑tokyo.c.jp
authors.forename: H
authors.initials: H
authors.lastname: Matsui
authors.forename: W
authors.initials: W
authors.lastname: Nomura
authors.forename: T
authors.initials: T
authors.lastname: Yatsui
authors.forename: M
authors.initials: M
authors.lastname: Ohtsu
authors.forename: H
authors.initials: H
authors.lastname: Tabata
mesh_terms: D002104:Cadmium; D004735:Energy Transfer; D004867:Equipment Design; D005453:Fluorescence; D049449:Luminescence; D008956:Models, Chemical; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000379:methods*; D011789:Quantum Theory; D012834:Silver; D015032:Zinc
chemical_list: D002104:Cadmium; D012834:Silver; D015032:Zinc