title: An order of magnitude increase in the quantum efficiency of (Al)GaAs nanowires using hybrid photonic-plasmonic modes.
abstract: We demonstrate 900% relative enhancement in the quantum efficiency (QE) of surface passivated GaAs nanowires by coupling them to resonant nanocavities that support hybrid photonic-plasmonic modes. This nonconventional approach to increase the QE of GaAs nanowires results in QE enhancement over the entire nanowire volume and is not limited to the near-field of the plasmonic structure. Our cavity design enables spatially and spectrally tunable resonant modes and efficient in- and out-coupling of light from the nanowires. Furthermore, this approach is not fabrication intensive; it is scalable and can be adapted to enhance the QE of a wide range of low QE semiconductor nanostructures.
authors.affiliation: Department of Electronic Materials Engineering and ‡Australian National Fabrication Facility, Research School of Physics and Engineering, The Australian National University , Canberra, A. C. T 0200, Australia.
authors.forename: Sudha
authors.initials: S
authors.lastname: Mokkapati
authors.forename: Dhruv
authors.initials: D
authors.lastname: Saxena
authors.forename: Nian
authors.initials: N
authors.lastname: Jiang
authors.forename: Li
authors.initials: L
authors.lastname: Li
authors.forename: Hark Hoe
authors.initials: HH
authors.lastname: Tan
authors.forename: Chennupati
authors.initials: C
authors.lastname: Jagadish
keywords: GaAs; Purcell factor; nanowire; quantum efficiency; radiative redombination rate; surface passivation