Results 31 to 40 of about 843 (177)
Self-assembled InAs quantum dot formation on GaAs ring-like nanostructure templates
Nanoscale Research Letters, 2007 The evolution of InAs quantum dot (QD) formation is studied on GaAs ring-like nanostructures fabricated by droplet homo-epitaxy. This growth mode, exclusively performed by a hybrid approach of droplet homo-epitaxy and Stransky-Krastanor (S-K) based QD ...
Strom NW +5 more
doaj +1 more source
AIP Advances, 2021 We report on the development of deep-ultraviolet (DUV) wavelength-selective top-illuminated photodetectors based on AlGaN/AlN quantum-dots-in-wells. Structures consisting of 100 AlGaN wells and AlN barriers were grown by plasma-assisted molecular beam ...
Pallabi Pramanik +5 more
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Exciton Dynamics in Droplet Epitaxial Quantum Dots Grown on (311)A-Oriented Substrates
Nanomaterials, 2020 Droplet epitaxy allows the efficient fabrication of a plethora of 3D, III–V-based nanostructures on different crystalline orientations. Quantum dots grown on a (311)A-oriented surface are obtained with record surface density, with or without a wetting ...
Marco Abbarchi +3 more
doaj +1 more source
Kinetic calculation analysis of Ga deposition on the morphology evolution of GaAs quantum ring
Materials Research Express, 2021 GaAs Quantum Ring (QR) was gained on GaAs (001) by Droplet Epitaxy (DE), and the microscopic morphology of the GaAs samples was observed by Scanning Tunnel Microscope (STM).
Qi-Zhi Lang +3 more
doaj +1 more source
Reentrant Behavior of the Density vs. Temperature of Indium Islands on GaAs(111)A
Nanomaterials, 2020 We show that the density of indium islands on GaAs(111)A substrates have a non-monotonic, reentrant behavior as a function of the indium deposition temperature.
Artur Tuktamyshev +6 more
doaj +1 more source
Control of complex quantum structures in droplet epitaxy [PDF]
Semiconductor Science and Technology, 2019 Abstract We report the controllable growth of GaAs quantum complexes in droplet molecular-beam epitaxy, and the optical properties of self-assembled Al x Ga
J M A Chawner +6 more
openaire +1 more source
Phonon bottleneck in GaAs/AlxGa1−xAs quantum dots
AIP Advances, 2015 We report low-temperature photoluminescence measurements on highly-uniform GaAs/AlxGa1−xAs quantum dots grown by droplet epitaxy. Recombination between confined electrons and holes bound to carbon acceptors in the dots allow us to determine the energies ...
Y. C. Chang +4 more
doaj +1 more source
Advanced Functional Materials, EarlyView.A giant magnetic coercivity and a vertical shift of hysteresis loops are demonstrated in Sr3YCo4O10+δ epitaxial films. The hard magnetic behavior originates from ferromagnetic spin bags stabilized within a long‐range ordered oxygen‐vacancy structure.
Yanbin Chen +12 more
wiley +1 more source
Advanced Functional Materials, EarlyView.Effective control over the crystalline contact plane and microstructure of a naphthalenediimide‐bithiazole copolymer enables high‐performance n‐type thermoelectrics. While rubbing alignment induces a detrimental edge‐on orientation, subsequent solvent vapor‐induced re‐orientation facilitates a favorable mixed face‐on/edge‐on morphology.
Suhao Wang +13 more
wiley +1 more source
Growth of Low-Density Vertical Quantum Dot Molecules with Control in Energy Emission
Nanoscale Research Letters, 2010 In this work, we present results on the formation of vertical molecule structures formed by two vertically aligned InAs quantum dots (QD) in which a deliberate control of energy emission is achieved.
Fuster D +8 more
doaj +1 more source