We report the study on formation and thermal annealing of InAs quantum dots grown by droplet epitaxy on GaAs (111)A surface. By following the changes in RHEED pattern, we found that InAs quantum dots arsenized at low temperature are lattice matched with GaAs substrate, becoming almost fully relaxed when substrate temperature is increased. Morphological characterizations performed by atomic force microscopy show that annealing process is able to change density and aspect ratio of InAs quantum dots and also to narrow size distribution.

Bietti, S., Esposito, L., Fedorov, A., Ballabio, A., Martinelli, A., Sanguinetti, S. (2015). Characterization and Effect of Thermal Annealing on InAs Quantum Dots Grown by Droplet Epitaxy on GaAs(111)A Substrates. NANOSCALE RESEARCH LETTERS, 10(1), 930 [10.1186/s11671-015-0930-3].

Characterization and Effect of Thermal Annealing on InAs Quantum Dots Grown by Droplet Epitaxy on GaAs(111)A Substrates

BIETTI, SERGIO
;
ESPOSITO, LUCA
Secondo
;
SANGUINETTI, STEFANO
Ultimo
2015

Abstract

We report the study on formation and thermal annealing of InAs quantum dots grown by droplet epitaxy on GaAs (111)A surface. By following the changes in RHEED pattern, we found that InAs quantum dots arsenized at low temperature are lattice matched with GaAs substrate, becoming almost fully relaxed when substrate temperature is increased. Morphological characterizations performed by atomic force microscopy show that annealing process is able to change density and aspect ratio of InAs quantum dots and also to narrow size distribution.
Articolo in rivista - Articolo scientifico
Droplet epitaxy; GaAs(111)A; InAs quantum dots;
Droplet epitaxy; GaAs(111)A; InAs quantum dots; Materials Science (all); Condensed Matter Physics
English
2015
10
1
930
247
open
Bietti, S., Esposito, L., Fedorov, A., Ballabio, A., Martinelli, A., Sanguinetti, S. (2015). Characterization and Effect of Thermal Annealing on InAs Quantum Dots Grown by Droplet Epitaxy on GaAs(111)A Substrates. NANOSCALE RESEARCH LETTERS, 10(1), 930 [10.1186/s11671-015-0930-3].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/97074
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