Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2004-11-17
Phys. Rev. B 71, 205315 (2005)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
9 pages, 4 figures
Scientific paper
10.1103/PhysRevB.71.205315
Time-resolved Faraday rotation studies of CdS/CdSe/CdS quantum-dot quantum wells have recently shown that the Faraday rotation angle exhibits several well-defined resonances as a function of probe energy close to the absorption edge. Here, we calculate the Faraday rotation angle from the eigenstates of the quantum-dot quantum well obtained with k.p theory. We show that the large number of narrow resonances with comparable spectral weight observed in experiment is not reproduced by the level scheme of a quantum-dot quantum well with perfect spherical symmetry. A simple model for broken spherical symmetry yields results in better qualitative agreement with experiment.
Awschalom David D.
Meier Florian
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