Single-electron charging of self-assembled InAs quantum dots
M. Fricke, A. Lorke, M. Haslinger, J. P. Kotthaus, G. Medeiros-Ribeiro, P. M. Petroff
Abstract
The many-particle ground state and excitations of self-assembled InAs quantum dots are investigated using far-infrared (FIR) and capacitance spectroscopy. The contributions of quantization and charging energies to the n--electron energy spectrum are determined. For n = 1, 2, we find good agreement with a parabolic model; for higher filling, the Coulomb interaction reveals itself not only in the capacitance, but also in the FIR excitations
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