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Heterogeneous confinement in laterally coupled InGaAs/GaAs quantum dot molecules under lateral electric fields

J. Peng, C. Hermannstädter, M. Witzany, M. Heldmaier, L. Wang, S. Kiravittaya, A. Rastelli, O. G. Schmidt, P. Michler, G. Bester
2010 Physical Review B  

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2009 pre-print arXiv:0910.5138v1 fatcat:frcnj4hdv5fuzh76oi7wmvs3li

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2010 accepted
arXiv:0910.5138v2 fatcat:4icbvjre6jg6ffnjqrikxksqti
We study the electronic and optical properties of laterally coupled InGaAs/GaAs quantum dot molecules under lateral electric field. We find that electrons perceive the double-dot structure as a compound single object, while the holes discern two well separated dots. Through a combination of predictive atomistic modeling, detailed morphology studies, and single object micro-photoluminescence measurements, we show that this peculiar confinement results in an unusual heterogeneous behavior of
more » ... rons and holes with profound consequences on optical properties.
doi:10.1103/physrevb.81.205315 fatcat:h5dmgydikbhpnhdpcnsosndiqu
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J. Peng, C. Hermannstädter, M. Witzany, M. Heldmaier, L. Wang, S. Kiravittaya, A. Rastelli, O. G. Schmidt, P. Michler, G. Bester. "Heterogeneous confinement in laterally coupled InGaAs/GaAs quantum dot molecules under lateral electric fields." Physical Review B 81.20 (2010)