Far-infrared absorption spectra of three electrons in a square-well quantum dot

Abstract

We determined the far-infrared absorption spectra of a square-well quantum dot in which three electrons are confined by a heterostructure composed of GaAs AlGaAs . There are many types of optical transitions, some induced by electron-electron interaction, although there are no many-body effects on far-infrared absorption spectra in a quantum dot with parabolic confinement. As the size of the square-well quantum dot increases, electron correlation becomes strong, resulting in considerable changes in the far-infrared absorption spectra. Thus, far-infrared absorption spectroscopy enables us to investigate correlated electrons confined in zero-dimensional nanostructures.