Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2008-09-15
J. Appl. Phys. 105, 122408 (2009)
Physics
Condensed Matter
Other Condensed Matter
14 pages, 4 figures; the following article has been submitted to Journal of Applied Physics (29th ICPS - invited paper); after
Scientific paper
10.1063/1.3117234
Single lateral InGaAs quantum dot molecules have been embedded in a planar micro-cavity in order to increase the luminescence extraction efficiency. Using a combination of metal-organic vapor phase and molecular beam epitaxy samples could be produced that exhibit a 30 times enhanced single-photon emission rate. We also show that the single-photon emission is fully switchable between two different molecular excitonic recombination energies by applying a lateral electric field. Furthermore, the presence of a polarization fine-structure splitting of the molecular neutral excitonic states is reported which leads to two polarization-split classically correlated biexciton exciton cascades. The fine-structure splitting is found to be on the order of 10 micro-eV.
Beirne Gareth J.
Eichfelder M.
Hermannstädter Claus
Jetter Michael
Michler Peter
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