Anomalous Quantum-Confined Stark Effects in StackedSelf-Assembled Quantum Dots
- 9 April 2002
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 88 (16) , 167401
- https://doi.org/10.1103/physrevlett.88.167401
Abstract
Vertically stacked and coupled self-assembled quantum dots (SADs) are predicted to exhibit strong hole localization even with vanishing separation between the dots, and a nonparabolic dependence of the interband transition energy on the electric field, which is not encountered in single SAD structures. Our study based on an eight-band strain-dependent Hamiltonian indicates that this anomalous quantum confined Stark effect is caused by the three-dimensional strain field distribution which influences drastically the hole states in the stacked SAD structures.
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