Abstract
We report on the experimental study of the in-plane optical anisotropy of CdTe-based quantum wells with asymmetric barriers made of (Cd,Mg)Te or (Cd,Mn)Te ternary compounds. We observe a significant linear polarization of the fundamental excitonic transitions along the directions. The measured polarization rates are analyzed in the framework of an envelope function theory incorporating interface symmetry reduction for intermixed composition profiles. Fitting the experimental data produces interface anisotropy parameters that are larger than the ones predicted by a recent microscopic theory. The analysis shows an important influence of the interface profile asymmetry on the observed in-plane anisotropy.
- Received 30 December 2000
DOI:https://doi.org/10.1103/PhysRevB.64.045312
©2001 American Physical Society