Local optical absorption by confined excitons in single and coupled quantum dots

Abstract We study theoretically the local absorption spec-tra of single and double semiconductor quantum dots, where the three-dimensional confinement leads to an enhancement of Coulomb effects. We show that because of such Coulomb correlations the intensity of certain optical peaks as a func-tion of the resolution can exhibit an unexpected non-monot-onic behavior for spatial resolutions comparable with the ex-citonic Bohr radius.