DFG Forschergruppe 730

FOR 730 "Positioning of single nanostructures - Single quantum devices"

Goals

The unique success story of semiconductor physics and technology relies on the ability to highly integrate micro- and nanometer sized functional units on a single chip. Within the last few years single nanostructures, e.g., individual and coupled pairs of QDs, single molecules, and individual doping atoms moved more and more into the focus of many research groups to study the exciting physics and to exploit their tremendous potential for device applications. For example, single-electron and single-photon devices have been realized using quantum dots, molecules and doping atoms as active elements. In most of the previous work, the position of the nanostructure was random due to the self-organized growth process or unselective deposition methods, e.g., spin coating on unstructured substrates. In fact, the full advantage of their superior properties can be utilized if a controlled positioning or growth of the nanostructure inside a more complex device structure can be realized, thereby defining precise coupling between the microscopic nanostructure and the macroscopic periphery. It will be our prime task to investigate and develop methods which allow the controlled positioning of single nanostructures in basic electronic and optoelectronic nano-devices such as single photon sources, coupled quantum-dot gates and tunnelling diodes. At the same time this will allow us to study important quantum mechanical effects like, the Purcell effect, superradiance effect, Rabi oscillations, coupling of electronic levels, the tunnel effect under much more controlled conditions which will lead to a deeper physical understanding.

Project leaders 

Harald Giessen, Prof. Dr.

Fedor Jelezko, Dr. Michael Jetter, Dr. Klaus Kern, Prof. Dr. Klaus Kuhnke, Dr. Markus Lippitz, Prof. Dr. Peter Michler, Prof. Dr. Jens Pflaum, Prof. Dr. Armando Rastelli, Dr. Oliver Schmidt, Prof. Dr. Jörg Schulze, Prof. Dr. Heinz Schweizer, Prof. Dr. Ralf Vogelgesang, Dr. Jörg Wrachtrup, Prof. Dr.