We currently offer multiple BSc and MSc project theses for the topics listed below. These descriptions represent rough outlines and can be adapted to fit your interests and skills. If you are interested in one of the topics, contact Hermann Detz directly.
Analysis of interface morphologies within atomistic models of semiconductor heterostructures
Compound semiconductor heterostructures provide the foundation of modern electronic and opto-electronic devices. While atomically-sharp interfaces are desired, these can not always be achieved since the growth processes, particularly of mixed-group V alloys (e.g. GaAsSb or AlInAsSb) are not fully understood yet. Atomistic models allow to gain detailed insight into the formation of the heterojunctions during growth. The xtalsim software package (www.github.com/hermanndetz/xtalsim) provides algorithms to construct optimized interface morphologies, which simulate growth processes.
Your task will be to develop algorithms to enable an automated analysis of interface morphologies. Key figures to identify are local variations in composition and strain, as well as the identification of characteristic shapes.
You are a programming enthusiast and want to ...
- Be part of an international and multi-disciplinary team
- Contribute to an open-source software project
- Pursue independent home-office work
This topic can also be pursued within a BSc thesis in preparation for a MSc thesis.
Structural Analysis of Semiconductor Superlattices
Future generations of opto-electronic devices will rely on unconventional III-V semiconductor alloys. Relevant materials are AlInAsSb and BGaAs, which both can be used in strain-balanced superlattices. The growth by molecular beam epitaxy has recently been established. Yet, device integration of these materials requires further analysis and optimization.
Your task will be to chemically map the superlattice interfaces using secondary ion mass spectrometry (SIMS) and X-ray photon spectroscopy (XPS). This will provide insight into compositional variations, segregation, anti-site defects etc. and will enable optimized structures for quantum cascade laser and interband cascade laser devices.
You are a programming enthusiast and want to ...
- Be part of an international and multi-disciplinary team
- Get trained on the SIMS and XPS systems of CEITEC Nano
- Provide valuable feedback for the MBE growth team
