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arXiv · 1412.0806

Determinstic Generation of a Quantum Dot-Confined Triexciton and its Radiative Decay via Three-Photon Cascade

E. R. Schmidgall·I. Schwartz·L. Gantz·D. Cogan·S. Raindel·D. Gershoni
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Abstract

Semiconductor quantum dots (QDs) have potential applications in quantum information processing due to the fact that they are potential on-demand sources of single and entangled photons. Generation of polarization-entangled photon pairs was demonstrated using the biexciton-exciton radiative cascade. One obvious way to increase the number of quantum correlated photons that the QDs emit is to use higher-order multiexcitons, in particular the triexciton. Towards achieving this goal, we first demonstrate deterministic generation of the QD-confined triexciton in a well-definedcoherent state and then spectrally identify and directly measure a three-photon radiative cascade resulting from the sequential triexciton-biexciton-exciton radiative recombination.

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E. R. Schmidgall, I. Schwartz, L. Gantz, D. Cogan, S. Raindel, D. Gershoni. 2014-12-02. Determinstic Generation of a Quantum Dot-Confined Triexciton and its Radiative Decay via Three-Photon Cascade. https://doi.org/10.1103/physrevb.90.241411

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