The impact of low symmetry on the electronic and optical properties of quantum wires
Institute for Micro- and Opto-electronics, Department of Physics
Swiss Federal Institute of Technology-EPFL
PHB-Ecublens, CH-1015 Lausanne, Switzerland
Accepted: 20 September 2000
The role of the confinement potential symmetry on the electronic and optical properties of quantum wires is systematically studied. In a wide class of quantum wires with mirror symmetry we evidence a new set of optical transitions resulting both from band mixing and symmetry breaking at zone center. Several kinds of quasi–one-dimensional excitons are predicted as well as their specific dipole coupling. Even for ultralow C1 symmetry we find independent excitons with distinct polarization selection rules.
PACS: 71.35.Cc – Intrinsic properties of excitons; optical absorption spectra / 78.20.Bh – Optical Properties of bulk materials and thin films: Theory, models, and numerical simulation / 78.66.Fd – Optical properties of specific thin films, surfaces, and low-dimensional structures: III-V semiconductors
© EDP Sciences, 2000