Interface-phonon-assisted transitions in quantum-well lasers

Abstract

Interface-phonon-assisted transitions are shown to be important in determining the rates for bound-bound transitions as well as the optimum quantum-well parameters for recently proposed quantum-well lasers including the tunneling injection laser and the quantum cascade laser. In particular, it is demonstrated through the use of the dielectric continuum model for interface and confined phonons that the exploitation of interface-phonon-assisted transitions offers a means of maximizing key transition rates and thus of optimizing the performance of both the tunnel injection laser and the quantum cascade laser.