Regensburg 2004 – scientific programme

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HL: Halbleiterphysik

HL 18: Hauptvortrag Zacharias

HL 18.1: Invited Talk

Tuesday, March 9, 2004, 14:30–15:15, H15

Confinement effects in Si nanostructures — •Margit Zacharias, Johannes Heitmann, Vadim G. Talalaev, Roland Scholz, Florian M. Kolb, and Herbert Hofmeister — Max-Planck- Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle

Silicon is the main base material for modern microelectronics. Due to its indirect band structure it is not ideally suited for optoelectronic purposes. Nevertheless, because of its importance in microelectronics major research and development efforts have been undertaken to change silicon into a photonics material. The present lecture will highlight areas in which silicon promises to have an increasing impact in the area of photonics. Approaches developed in our group will be presented on how to transform silicon so that it can be used as an efficient light emitter in the visible and infrared. Especially the interaction of quantum confinement and migration effects of the excitons and the energy transfer to doping materials, i.e. Erbium, is investigated in details. The presented strategies for size controlled growth of nanocrystals and nanowires play a major role for the described investigations and perspective applications.