Abstract
We report investigations of highly resolved resonant Rayleigh scattering spectra from high quality GaAs quantum wells which were excited by a cw Ti:sapphire laser. Nevertheless, the resulting spectra show features of inhomogeneous broadening, such as resonance shifting and resonance fluorescence narrowing, arising from non-negligible localization of the excitons. Furthermore, the excitonic excitation dipoles were found to be preferentially aligned along (110) crystal axes. As a result, the Rayleigh component of the secondary emission does not necessarily reflect the polarization characteristics of the exciting laser.
- Received 1 February 2002
DOI:https://doi.org/10.1103/PhysRevB.67.195303
©2003 American Physical Society