title: Design considerations for semiconductor nanowire-plasmonic nanoparticle coupled systems for high quantum efficiency nanowires.
abstract: The optimal geometries for reducing the radiative recombination lifetime and thus enhancing the quantum efficiency of III-V semiconductor nanowires by coupling them to plasmonic nanoparticles are established. The quantum efficiency enhancement factor due to coupling to plasmonic nanoparticles reduces as the initial quality of the nanowire increases. Significant quantum efficiency enhancement is observed for semiconductors only within about 15 nm from the nanoparticle. It is also identified that the modes responsible for resonant enhancement in the quantum efficiency of an emitter in the nanowire are geometric resonances of surface plasmon polariton modes supported at the nanowire/nanoparticle interface.
authors.affiliation: Department of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 0200, Australia. sudha.mokkapati@anu.edu.au.
authors.forename: Sudha
authors.initials: S
authors.lastname: Mokkapati
authors.forename: Dhruv
authors.initials: D
authors.lastname: Saxena
authors.forename: Hark Hoe
authors.initials: HH
authors.lastname: Tan
authors.forename: Chennupati
authors.initials: C
authors.lastname: Jagadish
mesh_terms: D036103:Nanotechnology / Q000379:methods; D053770:Nanowires / Q000737:chemistry*; D045663:Quantum Dots / Q000737:chemistry*; D012666:Semiconductors; D020349:Surface Plasmon Resonance
keywords: core/shell materials; nanowires; plasmonic nanoparticles; quantum efficiency; semiconductor nanowires