Semiconductor nanostructures for fundamental physics and optoelectronic applications

An overview is given on the fabrication of semiconductor nanostructures and their applications in fundamental physics and optoelectronic devices. With advanced epitaxial growth techniques for self-assembled quantum dots in combination with high resolution lithography and high aspect ratio dry etching techniques, a new class of miniaturized quantum laboratories based on the interaction of single electrons and photons could be realised. High quality quantum dot structures are used to fabricate lasers in the wavelength range from 1 - 2 mu m. Examples are shown for telecom and high power applications with extraordinary properties based on specific quantum dot effects.