Physics – Condensed Matter – Materials Science
Scientific paper
2004-02-09
Physics
Condensed Matter
Materials Science
23 pages, 8 figures, 1 table
Scientific paper
10.1103/PhysRevB.69.235316
We study the multi-exciton optical spectrum of vertically coupled GaN/AlN quantum dots with a realistic three-dimensional direct-diagonalization approach for the description of few-particle Coulomb-correlated states. We present a detailed analysis of the fundamental properties of few-particle/exciton interactions peculiar of nitride materials. The giant intrinsic electric fields and the high electron/hole effective masses give rise to different effects compared to GaAs-based quantum dots: intrinsic exciton-exciton coupling, non-molecular character of coupled dot exciton wavefunction, strong dependence of the oscillator strength on the dot height, large ground state energy shift for dots separated by different barriers. Some of these effects make GaN/AlN quantum dots interesting candidates in quantum information processing.
D'Amico Irene
Rinaldis Sergio de
Rossi Fausto
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