Anomalous quantum confined Stark effects in vertically coupled InAs/GaAs self-assembled quantum dots

摘要

In vertically stacked and coupled InAs/GaAs self-assembled quantum dots (SADs), the interband transition energy is predicted to exhibit a strong non-parabolic dependence on the electric field, which is not encountered in single SAD structures. An eight-band strain-dependent k·p Hamiltonian indicates that this anomalous quantum confined Stark effect is caused by the three-dimensional strain field distribution which influences drastically the hole states in the stacked SAD structures.