Optical polarization anisotropy and hole states in pyramidal quantum dots

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.


Published in:
Applied Physics Letters, 89, 25, 25113
Year:
2006
Keywords:
Laboratories:




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