Entangled photon pairs produced by a quantum dot strongly coupled to a microcavity

Abstract

We show theoretically that entangled photon pairs can be produced on demand through the biexciton decay of a quantum dot strongly coupled to the modes of a photonic crystal. The strong coupling allows to tune the energy of the mixed exciton-photon (polariton) eigenmodes, and to overcome the natural splitting existing between the exciton states coupled with different linear polarizations of light. Polariton states are moreover well protected against dephasing due to their lifetime ten to hundred times shorter than that of a bare exciton. Our analysis shows that the scheme proposed can be achievable with the present technology.

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• Optimizing H1 cavities for the generation of entangled photon pairs
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• Nonclassical Correlation of Polarization Entangled Photons in a Biexciton-Exciton Cascade
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• Polarization-entangled photon generation by a semiconductor quantum dot coupled to a cavity interacting with external fields
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