Effects of Well Shapes on Energy Shifts of Subbands and Excitons in Quantum Wells in an Electric Field
势阱形状对电场下量子阱子带和激子能移的影响

Under the bound-state approximation,subbands of electrons and holes in GaAs/GaAlAsquantum wells with different shapes in an electric field are solved by using the method of se-ries expansion.Then, variational method is used to obtain the binding energies of excitons.Based on these, we have for the first time obtained the variational picture of the energy shiftsof subbands and excitons from a parabolic to square well.Considering the effect of the shapeof GaAs/GaAlAs quantum well, caloulated results agree well with experiments.