Electrical manifestation of the quantum-confined Stark effect by quantum capacitance response in an optically excited quantum well - art. no. 113305

We have studied the capacitance-voltage characteristics of an optically exc ited wide quantum well. Both self-consistent simulations and experimental r esults show the striking quantum contribution to the capacitance near zero bias which is ascribed to the swift decreasing of the overlap between the e lectron and hole wave functions in the well as the longitudinal field goes up. This quantum capacitance feature is regarded as an electrical manifesta tion of the quantum-confined Stark effect.