Polarization-correlated photon pairs from a single quantum dot
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- 16 July 2002
- journal article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 66 (4)
- https://doi.org/10.1103/physrevb.66.045308
Abstract
Polarization correlation in a linear basis, but not entanglement, is observed between the biexciton and single-exciton photons emitted by a single InAs quantum dot in a two-photon cascade. The results are well described quantitatively by a probabilistic model that includes two decay paths for a biexciton through a non-degenerate pair of one-exciton states, with the polarization of the emitted photons depending on the decay path. The results show that spin non-degeneracy due to quantum-dot asymmetry is a significant obstacle to the realization of an entangled-photon generation device.Comment: 4 pages, 4 figures, revised discussioKeywords
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