Research Journal of Optics and Photonics

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Abdennaceur Karoui Author

akaroui@nccu.edu (919)530 6006 | (919)530 600

Subjects of specialization
Triple quantum dots; Quantum wells; Single electron states; Localization; Tunneling

Affiliation
Centers For Research Excellence in Science and Technology, North Carolina Central University, 1801 Fayetteville St. Durham, NC 27707, USA

Biography

Abdennaceur Karoui, Centers For Research Excellence in Science and Technology, North Carolina Central University, 1801 Fayetteville St. Durham, NC 27707, USA and he has 51 publications Time-dependent nonlinear finite element modeling of the elastic and plastic deformation in SiGe heterostructured nanomaterials

Publications

Research Article Open Access

Single Electron Localization and Tunneling in Weakly Coupled Quantum Dot Array

Author(s):

Abdennaceur Karoui

Electron localization and tunneling in quantum dot (QD) arrays are discussed in this paper. Various arrays of InAs/GaAs QDs are modelled as laterally distributed dots, using single sub-band effective mass approach with effective potential simulating the strain effect. Triple QDs (TQD) configured in triangle and in linear chain is considered. Electron localization in double quantum dot (DQD) and in TQD is studied over the entire electron energy spectrum by varying the geometry parameters of these QD arrays. The spectral distribution of localized and delocalized states appeared very sensitive to the violation of the mirror symmetry of the systems. The effect of adding a third dot to a DQD is also investigated. We show that the presence of a third dot increases the tunneling in the initial... view more»

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