Making use of the droplet-epitaxial technique, we realized a series of GaAs/AlGaAs nanostructured samples, starting from the same initial Ga droplet configuration, in which the nanostructure morphologies are progressively changed, via the As partial pressure provided during the growth, from islands, to single rings and, eventually, to concentric ring structures. We report a detailed characterization of the different structure morphologies, electronic structures and carrier dynamics via AFM and pho-toluminescence measurements as well as through theoretical simulations
Bietti, S., Somaschini, C., Abbarchi, M., Koguchi, N., Sanguinetti, S., Poliani, E., et al. (2009). Quantum dots to double concentric quantum ring structures transition. PHYSICA STATUS SOLIDI. C, CURRENT TOPICS IN SOLID STATE PHYSICS, 6(4), 928-931 [10.1002/pssc.200880616].
Quantum dots to double concentric quantum ring structures transition
BIETTI, SERGIOPrimo
;SOMASCHINI, CLAUDIOSecondo
;SANGUINETTI, STEFANO
;POLIANI, EMANUELE MARIA;BONFANTI, MATTEO;
2009
Abstract
Making use of the droplet-epitaxial technique, we realized a series of GaAs/AlGaAs nanostructured samples, starting from the same initial Ga droplet configuration, in which the nanostructure morphologies are progressively changed, via the As partial pressure provided during the growth, from islands, to single rings and, eventually, to concentric ring structures. We report a detailed characterization of the different structure morphologies, electronic structures and carrier dynamics via AFM and pho-toluminescence measurements as well as through theoretical simulations
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