Self-Directed Growth of AlGaAs Core−Shell Nanowires for Visible Light Applications

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Authors

Chen · University of Waterloo

Shyemaa Shehata · McMaster University

Cécile Fradin · University of Waterloo

Ray LaPierre · McMaster University

Christophe Couteau · McMaster University

Gregor Weihs · University of Waterloo

Abstract

Al0.37Ga0.63As nanowires (NWs) were grown in a molecular beam epitaxy system on GaAs(111)B substrates. Micro-photoluminescence measurements and energy dispersive X-ray spectroscopy indicated a core--shell structure and Al composition gradient along the NW axis, producing a potential minimum for carrier confinement. The core--shell structure formed during growth as a consequence of the different Al and Ga adatom diffusion lengths.

Topics & Keywords

Nanowire Synthesis and Applications Semiconductor Quantum Structures and Devices Quantum Dots Synthesis And Properties

UN Sustainable Development Goals

Affordable and clean energy

Publication Details

Published in: Nano Letters

Volume 7, Issue 9, pp. 2584-2589

DOI: 10.1021/nl070874k

Field-Weighted Citation Impact: 5.89