Karlsson, K. F. and Troncale, V. and Oberli, D. Y. and Malko, A. and Pelucchi, E. and Rudra, A. and Kapon, E.

2006

Applied Physics Letters

Optical polarization anisotropy and hole states in pyramidal quantum dots

Validated

()

89

25

The authors present a polarization-resolved photoluminescence study of single semiconductor quantum dots (QDs) interconnected to quantum wires, measured both in a top geometry, and in a less conventional cleaved-edge geometry. Strong polarization anisotropy is revealed for all observed transitions, and it is deduced that closely spaced QD hole states exhibit nearly pure heavy-or light-hole character. These effects are attributed to the large aspect ratio of the dot shape. (c) 2006 American Institute of Physics.