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Nearly intrinsic exciton lifetimes in single twin-free GaAs/AlGaAs core-shell nanowire heterostructures

Perera, S.; Fickenscher, M. A.; Jackson, H. E.; Smith, L. M.; Yarrison-Rice, J. M.; Joyce, H. J.; Gao, Q.; Tan, H. H.; Jagadish, C.; Zhang, X.; Zou, J.


CW and time-resolvedphotoluminescence measurements are used to investigate exciton recombination dynamics in GaAs∕AlGaAsheterostructurenanowires grown with a recently developed technique which minimizes twinning. A thin capping layer is deposited to eliminate the possibility of oxidation of the AlGaAs shell as a source of oxygen defects in the GaAs core. We observe exciton lifetimes of ∼1ns, comparable to high quality two-dimensional double heterostructures. These GaAsnanowires allow one to...[Show more]

CollectionsANU Research Publications
Date published: 2008-08-06
Type: Journal article
Source: Applied Physics Letters
DOI: 10.1063/1.2967877


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