title: Carrier density dependence of plasmon-enhanced nonradiative energy transfer in a hybrid quantum well-quantum dot structure.
abstract: An array of Ag nanoboxes fabricated by helium-ion lithography is used to demonstrate plasmon-enhanced nonradiative energy transfer in a hybrid quantum well-quantum dot structure. The nonradiative energy transfer, from an InGaN/GaN quantum well to CdSe/ZnS nanocrystal quantum dots embedded in an ~80 nm layer of PMMA, is investigated over a range of carrier densities within the quantum well. The plasmon-enhanced energy transfer efficiency is found to be independent of the carrier density, with an efficiency of 25% reported. The dependence on carrier density is observed to be the same as for conventional nonradiative energy transfer. The plasmon-coupled energy transfer enhances the QD emission by 58%. However, due to photoluminescence quenching effects an overall increase in the QD emission of 16% is observed.
authors.forename: L J
authors.initials: LJ
authors.lastname: Higgins
authors.forename: V D
authors.initials: VD
authors.lastname: Karanikolas
authors.forename: C A
authors.initials: CA
authors.lastname: Marocico
authors.forename: A P
authors.initials: AP
authors.lastname: Bell
authors.forename: T C
authors.initials: TC
authors.lastname: Sadler
authors.forename: P J
authors.initials: PJ
authors.lastname: Parbrook
authors.forename: A L
authors.initials: AL
authors.lastname: Bradley