SANDiE Partner P07

Technische Universiteit Eindhoven, The Netherlands

In the group in Eindhoven we have a strong interest in self-assembled III/V nanostructures such as quantum dots, rings and nanocolumns. We contribute to the Network of Excellence SANDiE with our expertise in structural analysis and optical spectroscopy.

The structural properties such as size, shape and composition of self-assembled nanostructures are analyzed at the atomic scale by using cross-sectional STM. This not only allows for a detailed understanding of the self-assembly processes that are involved in the formation of these nanostructures but it also assists in a better understanding of the optical and electronic properties of self-assembled nanostructures. We have shown furthermore that with STM we can directly probe the spatial distribution of the wavefunction of the confined states in a quantum dot. We especially aim at combining the structural analysis with theoretical models to calculate the opto-electronic properties of the analyzed structures.

Time-resolved spectroscopy is used to unravel the dynamical process in self-assembled quantum dots. Special attention is paid to carrier trapping in low-temperature grown quantum dots where we expect a very fast optical recombination. This property will be very useful for ultrafast opto-electronic devices.

Homepage

last update: 28 February 2019, A. Weber