Heterogeneous confinement in laterally coupled InGaAs/GaAs quantum dot molecules under lateral electric fields
| Autor: | Peter Michler, Matthias Heldmaier, Gabriel Bester, M. Witzany, Armando Rastelli, Suwit Kiravittaya, C. Hermannstädter, L. J. Wang, Jie Peng, Oliver G. Schmidt |
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| Rok vydání: | 2010 |
| Předmět: |
Materials science
Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics business.industry Ingaas gaas Quantum dot molecules FOS: Physical sciences Electron Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics Signal Electronic Optical and Magnetic Materials Quantum dot Electric field Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Optoelectronics business |
| Zdroj: | Physical Review B. 81 |
| ISSN: | 1550-235X 1098-0121 |
| Popis: | 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 electrons and holes with profound consequences on optical properties. 4 pages, 4 figures; http://www.fkf.mpg.de/bester/publications/publications.html |
| Databáze: | OpenAIRE |
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