Investigation of electron-optical phonon interactions in moderate wide InxGa1-xAs/GaAs strained quantum wells

Abstract

In this presentation, we have calculated the electron-optical phonon scattering rate of GaAs/AlAs quantum wells and average electron energy loss rate as a function of well width of the GaAs/AlxGa1-xAs quantum wells. We have also studied the Raman and hot electron-neutral acceptor luminescence in moderate wide InxGa1-xAs/GaAs strained quantum wells (with 10 nm in well width and 30 nm in barrier width) to determine the dominant phonon mode emitted by the hot electrons in the wells at 15 K. The hot electron-neutral acceptor luminescence spectrum of the strained quantum well sample shows an oscillation period of about 22 meV which indicates that the hot electrons relaxed mostly through emissions of the InAs confined phonons. (C) 2001 Elsevier Science B.V. All rights reserved.