Transformation of self-assembled InAs/InP quantum dots into quantum rings without capping.
basic_science · Level V
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Abstract
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.
Medical subject headings
- Arsenicals
- Crystallization
- Indium
- Nanostructures
- Phosphines
- Quantum Dots