| Issue |
Europhys. Lett.
Volume 52, Number 4, November II 2000
|
|
|---|---|---|
| Page(s) | 420 - 426 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2000-00454-4 | |
| Published online | 01 September 2002 | |
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
Received:
17
July
2000
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
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