Wave functions of an electron at e₂ (green lines), a hole at h₁ (red lines) for ADQW1 with L_b1 = 7 nm, L_b2 = 4 nm, xl = 0.6, xc = 0.4, and xr = 0.4 for (a) L_w1 = 4 nm, L_w2 = 4 nm, and (b) L_w1 = 5 nm, L_w2 = 3 nm.