Electron-phonon coupling in the two phonon mode ternary alloy $Al_{0.25}In_{0.75}As/Ga_{0.25}In_{0.75}As$ quantum well

摘要

We have investigated the infrared transmission of a two-dimensional (2DEG)electron gas confined in a $Al_{0.25}In_{0.75}As/Ga_{0.25}In_{0.75}As$ singlequantum well in order to study the electron optical phonon interaction in a twophonon mode system. Infrared transmission experiments have been performed inboth the perpendicular Faraday (PF) and tilted Faraday (TF) configurations forwhich the growth axis of the sample is tilted with respect to the incidentlight propagation direction and to the magnetic field direction. Theexperimental results lead to question the validity of the concept of polaronmass in a real material.