Figure 1

Binding energy of 1 s -like heavy-hole exciton state as a function of left-hand- potential-barrier aluminum concentration (${\mathbf{x}}_{\mathbf{\text{Al}}}^1$). The results are for the ground exciton state (n _e = 1 and n _h = 1) with$x_{\text{Al}}^2=0.33$, L = 15 nm, and R = 10 nm. (a, b) Several values of the hydrostatic pressure with different setups of the applied electric field for α₀(P) = 3L(P)/4: (a) F = 0 kV/cm and (b) F = 20 kV/cm, have been considered. (c) The results are for two values of the applied electric field with P = 0 and α₀ = 0.