Figure 2

Potential curves${\mathit{E}}_{{{\mathit{\text{D}}}_{\mathbf{2}}}^{\mathbf{+}}}\left(\mathit{d}\mathbf{/}\mathbf{2}\mathbf{+}{\mathit{z}}_{\mathit{h}}\mathbf{,}\mathbf{-}\mathit{d}/\mathbf{2}-{\mathit{z}}_{\mathit{h}}\right)$for the electron confined in vertically coupled lens-shaped QDs. Solid lines represent energy levels of the Trion X⁺ and dashed lines, Trion X⁺. With separation, d, between layers and distance, Z _h , between the hole and the layer for zero-magnetic field case (γ = 0).