Nonlinear optically detected electrophonon resonance full width at half maximum in a parabolic GaAs quantum well with different phonon models

Abstract

Abstract The effect of different phonon models (confined and bulk phonons) on the linear optically detected electrophonon resonance (LODEPR), nonlinear optically detected electron-phonon resonance (NLODEPR) effect and full-width at half-maximum (FWHM) of the LODEPR and NLODEPR peaks via both one and two photon absorption processes in a parabolic GaAs quantum well by using the state-dependent operator projection is theoretically studied. The obtained numerical result for the parabolic GaAs/AlAs quantum well shows that the FWHM of the LODEPR and NLODEPR peaks increase with increasing well’s confinement frequency and temperature for the above both models of the phonon. Besides, the FWHM of the LODEPR and NLODEPR peaks for the confined phonon case varies faster and have a larger value than it does for the bulk phonon case. Furthermore, the FWHM of the NLODEPR peaks is about one order of value smaller than the linear one for the above both models of the phonon; in the large range of the confinement frequency (ωz /ωLO < 0.2), the effect of phonon confinement on the FWHM of the LODEPR and NLODEPR peaks becomes important and cannot be neglected in considering.