Abstract
The dark states of the heavy-hole ground-state exciton have been studied by photoluminescence spectroscopy of single self-assembled quantum dots in magnetic fields of varying strengths and orientations. When tilting B out of the [001] crystal direction the exciton states with angular momenta are mixed with the states and become observable. In combination with a detailed analysis of the corresponding Hamiltonian a comprehensive picture of the exciton fine structure is obtained. This fine structure is characteristic for direct gap semiconductors with a twofold degenerate valence band.
- Received 24 September 1999
DOI:https://doi.org/10.1103/PhysRevB.61.7273
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