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

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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)

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Journal: TechConnect Briefs
Volume: 2, Technical Proceedings of the 2002 International Conference on Computational Nanoscience and Nanotechnology
Published: April 22, 2002
Pages: 227 - 230
Industry sectors: Advanced Materials & Manufacturing | Sensors, MEMS, Electronics
Topic: Modeling & Simulation of Microsystems
ISBN: 0-9708275-6-3