Symmetry dependent electron localization and optical absorption of polygonal quantum rings

@article{Sitek2015SymmetryDE,
  title={Symmetry dependent electron localization and optical absorption of polygonal quantum rings},
  author={Anna Sitek and Vidar Gudmundsson and Andrei Manolescu},
  journal={2015 17th International Conference on Transparent Optical Networks (ICTON)},
  year={2015},
  pages={1-4}
}
We compare energy spectra, electron localization and optical absorption of square and diamond quantum rings and analyze how sample geometry affects those features. We show that low energy levels of diamond rings form two groups delocalized between opposite corners which results in increased number of optical transitions. We also show that contacts applied to corner areas allow for continuous change between square- and diamond-like behavior of the same sample, irrespective of its shape. 

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This work was financially supported by the Research Fund of the University of Iceland, the Nordic network NANOCONTROL, project No.: P-13053, and by MINECO-Spain (Grant No. FIS2011-23526).
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