|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Frontiers in Materials Science, Engineering, and Technology: An FMD Symposium in Honor of Sungho Jin
||Quantum Dot Formation In Core-Shell Nanowires
||Q. Zhang, S.H. Davis, Peter Voorhees
|On-Site Speaker (Planned)
Quantum dots embedded within nanowires hold great promise in many quantum photonics applications. Recently, GaAs nanowires have been used as substrates to create novel optoelectronic devices by growing an AlGaAs alloy shell on a GaAs nanowire. The deposition of the AlGaAs layer leads to the spontaneous formation of stripes of Al along certain crystallographic directions and quantum dots near the apex of the shell. A model has been developed for the motion of the faceted AlGaAs-vapor interfaces that accounts for capillarity, deposition, and surface diffusion. We find that for certain combinations of these effects, facets can be present during growth that are not present on the interfacial energy minimizing Wulff shape. These small facets can lead to the formation of Al-rich stripes and quantum dots. The effects of surface diffusion, deposition, and surface energy on the development of stripes of Al and quantum dots will be discussed.
||Planned: Supplemental Proceedings volume