Potential curvesfor 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, Zh, between the hole and the layer for zero-magnetic field case (γ = 0).
Horta-Piñeres et al. Nanoscale Research Letters 2012 7:532 doi:10.1186/1556-276X-7-532