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. and Zou, J. (2008) Nearly intrinsic exciton lifetimes in single twin-free GaAs/AlGaAs core-shell nanowire heterostructures. Applied Physics Letters, 93 5: 053110.1-053110.3. doi:10.1063/1.2967877

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Author 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.
Title Nearly intrinsic exciton lifetimes in single twin-free GaAs/AlGaAs core-shell nanowire heterostructures
Journal name Applied Physics Letters   Check publisher's open access policy
ISSN 0003-6951
1077-3118
Publication date 2008-08-04
Year available 2008
Sub-type Article (original research)
DOI 10.1063/1.2967877
Open Access Status File (Publisher version)
Volume 93
Issue 5
Start page 053110.1
End page 053110.3
Total pages 3
Editor Lam, N.Q.
Place of publication College Park, MD, United States
Publisher American Institute of Physics
Collection year 2009
Language eng
Subject C1
970102 Expanding Knowledge in the Physical Sciences
100708 Nanomaterials
Formatted abstract
CW and time-resolved photoluminescence measurements are used to investigate exciton recombination dynamics in GaAs/AlGaAs heterostructure nanowires 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 ~1 ns, comparable to high quality two-dimensional double heterostructures. These GaAs nanowires allow one to observe state filling and many-body effects resulting from the increased carrier densities accessible with pulsed laser excitation.
Keyword aluminium compounds
carrier density
gallium arsenide
III-V semiconductors
laser beam effects
nanowires
photoluminescence
twinning
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Thu, 19 Mar 2009, 14:05:16 EST by Sally Beard on behalf of Materials