Influence of confined optical phonons on the magneto-optical properties in parabolic quantum wells

Abstract

In this study, we use the operator projection method and descriptions of the Fuchs–Kliewer, Ridley, and Huang–Zhu confined phonon models to investigate the influence of confined optical phonons on the magneto-optical properties in parabolic quantum wells by calculating the expression for the absorption power. The full width at half maximum (FWHM) is obtained for the cyclotron resonance peak by using a computational method. The FWHM is defined as functions of the confinement frequency, temperature, and magnetic field for both the bulk phonon and confined phonon models. The results are discussed and compared with those for square quantum wells. The results show that the FWHM has a larger value in the parabolic quantum wells and it varies more rapidly than that in the square quantum wells for both the bulk phonon and confined phonon models. Thus, phonon confinement has an important role and it should be considered when investigating the FWHM for parabolic quantum wells.