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 | Nanotech 2002 Vol. 1
Technical Proceedings of the 2002 International Conference on Modeling and Simulation of Microsystems
Chapter 10: Quantum Effects, Quantum Devices and Spintronics |
| | Computing Excitons in V-shaped Quantum Wires Including Band-Structure and Dielectric Effects : Binding energies and polarization anisotropy of the bright A1, B1, A2 excitons | | Authors: | M.A. Dupertuis, D.Y. Oberli and E. Kapon | | Affilation: | Swiss Federal Institute of Technology-EPFL, Switzerland | | Pages: | 524 - 527 | | Keywords: | quantum wires, excitons, finite elements, polarization anisotropy, Hartree-Fock | | Abstract: | We demonstrate an efficient numerical scheme for the computation of the excitonic optical response of actual GaAs/AlGaAs quantum wire structures including a large set of relevant effects; structural, valence band-mixing, dielectric and many-body effects can be accounted for. The optical response of excitons within k.p envelope function and Hartree-Fock approximation, are computed with band-mixing effects by stream-lined finite element techniques. The quantum-mechanical effects linked to the wire symmetry are also explicitely taken into account for the first time. A detailed comparison with relevant experimental PLE results is made, and a good agreement is obtained, including polarization anisotropy and binding energies of all bright excitons (A1, B1, A2) |  | View paper | | ISBN: | 0-9708275-7-1 |
| Pages: | 764 |
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