Bunching visibility for correlated photons from single GaAs quantum dots

Details Bunching visibility for correlated photons from single GaAs quantum dots Bunching visibility for correlated photons from single GaAs quantum dots

2008-11-20

arxiv.org/abs/0811.3261v1

Phys. Rev. B 79, 035330 (2009)

Physics

Condensed Matter

Materials Science

6 pages, 6 figs to appear in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.79.035330

We study photon bunching phenomena associated with biexciton-exciton cascade in single GaAs self-assembled quantum dots. Experiments carried out with a pulsed excitation source show that significant bunching is only detectable at very low excitation, where the typical intensity of photon streams is less than the half of their saturation value. Our findings are qualitatively understood with a model which accounts for Poissonian statistics in the number of excitons, predicting the height of a bunching peak being determined by the inverse of probability of finding more than one exciton.

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