Phonon-assisted carrier capture into a quantum well in an electric field

Abstract
We have theoretically investigated the capture of electrons into a quantum well by LO phonon scattering. The calculation was performed for a single, undoped GaAs/AlxGa1−xAs quantum well under applied electric bias. We have derived an expression for the time constant associated with the exchange of electrons between the fundamental ground state and the continuum states. The results are found to be in fairly good agreement with impedance spectroscopy measurements.