Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1546970 | Physica E: Low-dimensional Systems and Nanostructures | 2010 | 4 Pages |
Abstract
We have calculated the energies of the lowest four excitons (two bright states and two dark states) in an InAs/GaAs quantum dot under the longitudinal magnetic field, B. The calculations were carried out using the strain-dependent 8-band k·p theory and the configuration interaction method. At B=0, the electron-hole exchange interaction determines the splitting between the bright-state energies and that between the dark-state ones. The fine-structure splitting (bright-state splitting) is 30.7μeV. At Bâ¥1T, the Zeeman effect determines both splittings which change linearly with B with different exciton g-factors for the bright and dark states. The transition from the exchange-dominant to Zeeman-dominant splittings occurs at 0
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Authors
T. Saito, T. Nakaoka, Y. Arakawa,