Anomalous Stark effect in semiconductor quantum dots

Abstract

The effect of a lateral electric field on the ground-state energy of an electron-hole pair confined in a quantum dot is investigated on different levels of sophistication. Two different regimes occur: a Coulomb dominated one, where the influence of the field is weak, and a regime dominated by field induced effects. Depending on the strength of the Coulomb interaction relative to the single-particle energies, which varies with the quantum dot parameters, the transition between these regimes is either smooth or rather abrupt.