Materials based on quantum dots for novel optoelectronic devices

Supervisor: Mgr. Petr Klenovský, Ph.D.

Institution: Department of Condensed Matter Physics

Field of Study: Condensed Matter Physics

About my project

Within the proposed project, physical properties of materials based on quantum dots (QDs) for optoelectronic devices are examined. To investigate them, a state-of-the-art combination of first principles band structure and mesoscale calculations will be used to optimize the structures' growth and create single-photon source on Si. Beyond that, it is focused on the electronic structure of novel III-V semiconductor combination studied to be the building blocks for a novel kind of nanomemories.

I will be combined DFT with k.p calculations to investigate the Ge-ion bombardment effect on the excitonic structure of SiGe quantum dots (QDs) studied for CMOS compatible optoelectronics. Also by the combination of methods, I will study indirect transitions in structures for QD-Flash memories. Based on my calculations, the process of growth of both structures will be optimized. I also will measure the concentration of Ge-interstitials in SiGe QDs by Tip-enhanced Raman Spectroscopy method and be involved in the optical characterization of defect-enhanced dots at the partner institution in Linz. Finally, I will perform photoluminescence (PL) measurements of QDs for QD-Flash to study their electronic structure at the level of statistical PL and PL of the individual dot.

Where I see myself in my career in 10 years

10 years is a long time, yet I would like to continue developing the QDs-based materials and I would like to be involved in designing devices based on them to improve safety of communication or reduce electricity consumption. I would also like to continue to look for other interesting features of those quantum objects because of their quantum character they can offer another, yet undiscovered, range of applications.

What I like most about Brno

What I most appreciate here in Brno is the openness of students and the balance of service availibility with a plesant life.