Lateral Coupling within the Ensemble of InAs/InGaAlAs/InP Quantum Dashes
K. Ryczko, G. Sęk and J. Misiewicz
Institute of Physics, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
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In this work we investigate the electronic structure of coupled quantum dashes. The respective confined state energy levels are calculated for various cross-sectional shapes and sizes of the dashes and in function of the lateral distance between them. The results are confronted with the existing experimental data on the optical transitions in such structures. It has been concluded that for realistic system parameters (geometry and spatial in-plane separation) the obtained direct coupling is weak and in most of the applications the dashes can be considered individually, as long as the ensemble is strongly inhomegeneous.

DOI: 10.12693/APhysPolA.124.805
PACS numbers: 78.55.Cr, 73.21.Hb, 78.67.Uh