Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5489155 | Journal of Crystal Growth | 2017 | 6 Pages |
Abstract
Hybrid nanostructures are known to elicit an enhanced optical response. We study the directed alignment of ErAs metal nanoparticle (NP) and InAs quantum dot (QD) using molecular beam eptaxy (MBE) in a GaAs matrix. Due to high surface free energy caused by the crystal structure difference, overgrowth of an ErAs NP with GaAs forms a depression that condenses subsequent InAs adatoms to form an inverted QD self-aligned to the underlying ErAs NP. The ErAs NP growth, GaAs overgrowth, and InAs QD deposition were carefully controlled and studied with transmission electron microscopy (TEM) and atomic force microscopy (AFM) to investigate their effects on the QD-NP alignment.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Yuanchang Zhang, Kurt G. Eyink, Lawrence Grazulis, Madelyn Hill, Joseph Peoples, Krishnamurthy Mahalingam,