Dot-Size Dependent Excitons in Droplet-Etched Cone-Shell GaAs Quantum Dots
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DOI: 10.3390/nano12172981
Abstract: Strain-free GaAs quantum dots (QDs) are fabricated by filling droplet-etched nanoholes in AlGaAs. Using a template of nominally identical nanoholes, the QD size is precisely controlled by the thickness of the GaAs filling layer. Atomic… read more here.
Keywords: quantum dots; cone shell; droplet etched; gaas quantum ... See more keywords
Strong Electric Polarizability of Cone–Shell Quantum Structures for a Large Stark Shift, Tunable Long Exciton Lifetimes, and a Dot-to-Ring Transformation
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DOI: 10.3390/nano13050857
Abstract: Strain-free GaAs cone–shell quantum structures (CSQS) with widely tunable wave functions (WF) are fabricated using local droplet etching (LDE) during molecular beam epitaxy (MBE). During MBE, Al droplets are deposited on an AlGaAs surface, which… read more here.
Keywords: cone shell; quantum structures; shell quantum; shift ... See more keywords
Cone-Shell Quantum Structures in Electric and Magnetic Fields as Switchable Traps for Photoexcited Charge Carriers
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DOI: 10.3390/nano13101696
Abstract: The optical emission of cone-shell quantum structures (CSQS) under vertical electric (F) and magnetic (B) fields is studied by means of simulations. A CSQS has a unique shape, where an electric field induces the transformation… read more here.
Keywords: state; quantum; cone shell; energy ... See more keywords