Atomic-Scale Characterization of Droplet Epitaxy Quantum Dots [PDF]
Nanomaterials, 2021 The fundamental understanding of quantum dot (QD) growth mechanism is essential to improve QD based optoelectronic devices. The size, shape, composition, and density of the QDs strongly influence the optoelectronic properties of the QDs. In this article,
Raja S. R. Gajjela, Paul M. Koenraad
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Modeling of Al and Ga Droplet Nucleation during Droplet Epitaxy or Droplet Etching [PDF]
Nanomaterials, 2021 The temperature dependent density of Al and Ga droplets deposited on AlGaAs with molecular beam epitaxy is studied theoretically. Such droplets are important for applications in quantum information technology and can be functionalized e.g., by droplet ...
Christian Heyn, Stefan Feddersen
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Complex Nanostructures by Pulsed Droplet Epitaxy [PDF]
Nanomaterials and Nanotechnology, 2011 What makes three dimensional semiconductor quantum nanostructures so attractive is the possibility to tune their electronic properties by careful design of their size and composition. These parameters set the confinement potential of electrons and holes,
Noboyuki Koguchi +3 more
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Polarization Anisotropies in Strain-Free, Asymmetric, and Symmetric Quantum Dots Grown by Droplet Epitaxy [PDF]
Nanomaterials, 2021 We provide an extensive and systematic investigation of exciton dynamics in droplet epitaxial quantum dots comparing the cases of (311)A, (001), and (111)A surfaces.
Marco Abbarchi +4 more
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Comparative Chemico-Physical Analyses of Strain-Free GaAs/Al0.3Ga0.7As Quantum Dots Grown by Droplet Epitaxy [PDF]
Nanomaterials, 2020 We investigate the quantum confinement effects on excitons in several types of strain-free GaAs/Al 0.3 Ga 0.7 As droplet epitaxy (DE) quantum dots (QDs).
Inah Yeo +6 more
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Droplet Epitaxy Image Contrast in Mirror Electron Microscopy. [PDF]
Nanoscale Res Lett, 2017 Image simulation methods are applied to interpret mirror electron microscopy (MEM) images obtained from a movie of GaAs droplet epitaxy. Cylindrical symmetry of structures grown by droplet epitaxy is assumed in the simulations which reproduce the main features of the experimental MEM image contrast, demonstrating that droplet epitaxy can be studied in ...
Kennedy SM, Zheng CX, Jesson DE.
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High-temperature droplet epitaxy of symmetric GaAs/AlGaAs quantum dots. [PDF]
Sci Rep, 2020 AbstractWe introduce a high–temperature droplet epitaxy procedure, based on the control of the arsenization dynamics of nanoscale droplets of liquid Ga on GaAs(111)A surfaces. The use of high temperatures for the self-assembly of droplet epitaxy quantum dots solves major issues related to material defects, introduced during the droplet epitaxy ...
Bietti S +5 more
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Photoluminescence Study of Low Thermal Budget III–V Nanostructures on Silicon by Droplet Epitaxy [PDF]
Nanoscale Research Letters, 2010 We present of a detailed photoluminescence characterization of high efficiency GaAs/AlGaAs quantum nanostructures grown on silicon substrates. The whole process of formation of the GaAs/AlGaAs active layer was realized via droplet epitaxy and migration ...
Isella G +7 more
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Concentric Multiple Rings by Droplet Epitaxy: Fabrication and Study of the Morphological Anisotropy [PDF]
Nanoscale Research Letters, 2010 We present the Molecular Beam Epitaxy fabrication of complex GaAs/AlGaAs nanostructures by Droplet Epitaxy, characterized by the presence of concentric multiple rings.
Somaschini C +4 more
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Growth Interruption Effect on the Fabrication of GaAs Concentric Multiple Rings by Droplet Epitaxy [PDF]
Nanoscale Research Letters, 2010 We present the molecular beam epitaxy fabrication and optical properties of complex GaAs nanostructures by droplet epitaxy: concentric triple quantum rings.
Fedorov A +4 more
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