Figure 2

One-band model calculation for a type-II QW. (a) Calculated band diagram of a 6-nm GaAsSb/GaAs QW for a sheet charge density of 1 × 10¹¹ cm^-2: self-consistent potential (solid lines) and flat-band potential (dashed lines). Electron and heavy-hole wavefunctions with their eigenenergies are also plotted. (b) Calculated energy shift of the ground state for the electron (ΔE_e) and the heavy-hole (ΔE_hh) with respect to the flat-band condition. The transition energy shift (ΔE_PL) is given by the difference between the two energy shifts.