Spatial Ordering of Self-Assembled Quantum Dots
Abstract
The research performed so far has provided two significant results. First, we demonstrated that the combination of an ordered defect array with suitably chosen growth conditions for island formation has the potential to produce islands with properties that are superior to the currently grown samples. Our simulations indicate that for a given pattern there exists an optimal set of growth conditions at which the error rate the nucleation of an island at a position different from that determined by impurities) is the smallest and the most uniform islands form. Second, a joint experimental-theoretical work has focused on the ripening of the self-assembled quantum dots. We find that strain is responsible for the remarkable uniformity of th island sizes at the end of the deposition process. We also find that the dynamics of the morphological changes which occur in QDs after growth is well described by the Ostwald ripening process. Work in progress includes the development of a three dimensional Monte Carlo simulation with strain, the investigation of stacked quantum dots using molecular dynamics, and research investigating the shape of self-assembled quantum dots.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 22, 1998
- Accession Number
- ADA354196
Entities
People
- Albert-László Barabási
Organizations
- University of Notre Dame