Nano Letters · 2005 · 37 citations · 18 references
Natural SciencesMaterials SciencePhysicsElectronic MaterialsNanomaterialsSemiconductor MaterialsNanostructured Electronic MaterialsQuantum DotsSelf-assembled NanostructuresSelf-assemblySemiconductor Crystal GrowthSemiconductor PhysicsAtomic Force Microscopy AnalysisCharge-exchange ReactionsQuantum Dot MaterialsQuantum RingsSelf-assembled Quantum DotsSelf-exchange ReactionsSemiconductor Quantum DotsStrain Energy
Transformation of self-assembled InAs quantum dots (QDs) on InP(100) into quantum rings (QRs) is studied. In contrast to the typical approach to III--V semiconductor QR growth, the QDs are not capped to form rings. Atomic force micrographs reveal a drastic change from InAs QDs into rings after a growth interruption in tertiarybutylphosphine ambient. Strain energy relief in the InAs QD is discussed and a mechanism for dot-to-ring transformation by As/P exchange reactions is proposed.
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Spectroscopy of Nanoscopic Semiconductor Rings
A. Lorke, R.J. Luyken, Alexander O. Govorov et al. · Physical Review Letters · 2000 · 823 citations · Full text
Formation of InAs self-assembled quantum rings on InP
Applied Physics Letters · 2003 · 121 citations · Full text