Polarization fine structure and enhanced single-photon emission of self-assembled lateral InGaAs quantum dot molecules embedded in a planar microcavity

Single lateral InGaAs quantum dot molecules have been embedded in a planar microcavity 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 emi...

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Bibliographic Details
Published in:Journal of applied physics 2009-06, Vol.105 (12)
Main Authors: Hermannstädter, C., Witzany, M., Beirne, G. J., Schulz, W.-M., Eichfelder, M., Rossbach, R., Jetter, M., Michler, P., Wang, L., Rastelli, A., Schmidt, O. G.
Format: Article
Language:English
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Summary:Single lateral InGaAs quantum dot molecules have been embedded in a planar microcavity 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 μeV.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.3117234