Optical observation of single-carrier charging in type-II quantum ring ensembles

Young, Robert and Smakman, E. P. and Sanchez, A. M. and Hodgson, P. and Koenraad, P. M. and Hayne, M. (2012) Optical observation of single-carrier charging in type-II quantum ring ensembles. Applied Physics Letters, 100 (8): 082104. -. ISSN 0003-6951

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A high-purity GaSb/GaAs quantum ring system is introduced that provides both strong hole-confinement in the GaSb ring and electron confinement in its GaAs core. The latter is responsible for a reduced inhomogeous linewidth measured in photoluminescence, in comparison to the previous measurements made on nanostructures with differing morphology in this material system. This allows the resolution of multiple peaks in the photoluminescence due to discrete charging with holes, revealing the mechanism responsible for the excitation-power-induced blueshift. (C) 2012 American Institute of Physics. [doi:10.1063/1.3688037]

Item Type:
Journal Article
Journal or Publication Title:
Applied Physics Letters
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© 2012 American Institute of Physics
Uncontrolled Keywords:
?? hole spindotssemiconductorstatesphysicsphysics and astronomy (miscellaneous)qc physics ??
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Deposited On:
28 Mar 2012 00:01
Last Modified:
26 Jan 2024 01:13