Many-particle ground states and excitations in nanometer-size quantum structures

Recent experiments, which study the electronic structure of self-organized InAs nanostructures; are summarized. The results from simultaneously performed far-infrared (FIR) and capacitance spectroscopy allow for a detailed investigation of both many-particle ground states and excitations in these three-dimensionally confined, few-electron systems. Experimental data from quantum dots, coupled dots and ring-like structures are presented and evaluated with respect to the contributions from quantization, electron-electron interaction and an external applied magnetic field to the energy spectrum. (C) 1998 Elsevier Science B.V. All rights reserved.