Dr. Thomas Koprucki
Dr. Karsten Tabelow
Duration: 01.06.2017 - 31.12.2018
Semiconductor quantum dots are nanostructures that form a technological
path to innovative optoelectronic and photonic devices. Among them single
quantum dots are promising candidates for single and entangled photon
sources which are of importance for future quantum technologies such as
quantum information processing, quantum cryptography, and quantum metrology.
The growth of QDs with desired electronic properties would highly benefit
from the assessment of QD geometry, distribution, and strain profile in a
feedback loop between growth and analysis of their properties.
In this project, we will therefore develop a novel 3D model-based geometry
reconstruction (MBGR) of QDs. This will include an appropriate model for
the QD configuration in real space, a characterization of corresponding
simulated TEM images as well as a statistical procedure for the estimation
of QD properties and classification of QD types based on acquired TEM image data.
The MBGR approach will enable a high-throughput characterization of QD samples by TEM via QD geometry, distribution and strain field. Furthermore, it will provide a guiding example for mathematically enhanced microscopy for the reconstruction of other nanoscale objects in different applications.