Single-electron charging of self-assembled InAs quantum dots

TL;DR

This paper investigates the electronic properties of self-assembled InAs quantum dots, focusing on how quantization and Coulomb interactions influence their energy spectrum through spectroscopy techniques.

Contribution

It provides a detailed analysis of the many-particle ground state and excitations, highlighting the effects of charging and Coulomb interactions in quantum dots.

Findings

Good agreement with parabolic model for n=1, 2

Coulomb interactions affect FIR excitations at higher fillings

Capacitance measurements reveal charging effects

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