Abstract
We have observed a direct correlation between nonspherical shape and polarization anisotropy of optical transitions in quantum dots. The dots, grown by self-assembling during epitaxial deposition of InAs on exhibit a nonconventional, faceted, arrowheadlike shape aligned in the [2¯33] direction. The dot photoluminescence emission is partially polarized along the same [2¯33] direction. The presence and the sign of the emission polarization is in agreement with the predictions of a theoretical model. Full morphological and optical characterization is reported.
- Received 7 August 1997
DOI:https://doi.org/10.1103/PhysRevB.57.R6815
©1998 American Physical Society