Effects of Coulomb interactions on the splitting of luminescence lines

  • Rodriguez B
  • Gonzalez A
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We study the splitting between the right- and left-hand circularly polarized luminescence lines in a quantum dot under relatively weak confinement regime and resonant high-power excitation. When the dot is populated with an even number of electron-hole pairs (biexciton and higher excitations), the splitting measures basically the Zeeman energy. However, in the odd number of pairs case, we have, in addition to the Zeeman and Overhauser shifts, a contribution to the splitting coming from Coulomb interactions. This contribution is of the order of a few millielectronvolts, and shows distinct signatures of shell-filling in the quantum dot. © 2004 Published by Elsevier B.V.

Author-supplied keywords

  • Coulomb interactions
  • Luminescence
  • Quantum dots
  • Zeeman splitting

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  • Boris A. Rodriguez

  • Augusto Gonzalez

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