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arXiv · 2307.03619

Enhancing the efficiency of quantum-dot-based single-photon source designs by suppressing background emission using concentric rings

Martin Arentoft Jacobsen·Luca Vannucci·Julien Claudon·Jean-Michel Gérard·Niels Gregersen
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Abstract

In this paper, we theoretically demonstrate that a few-period circular Bragg reflector consisting of concentric rings placed around an infinite nanowire with an embedded quantum dot can increase the fraction of radiative emission into the fundamental $\mathrm{HE}_{11}$ mode ($β=Γ_{\rm HE_{11}}/Γ_{\rm Total}$) up to 0.999 due to enhanced suppression of the emission into radiation modes caused by a photonic bandgap effect. We then apply this strategy in the practically relevant case of the finite-sized single-photon source based on tapered nanowires and demonstrate that the collection efficiency can be improved. Additionally, we also show the beneficial effects of placing optimized rings around the micropillar single-photon source.

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Martin Arentoft Jacobsen, Luca Vannucci, Julien Claudon, Jean-Michel Gérard, Niels Gregersen. 2026-05-19. Enhancing the efficiency of quantum-dot-based single-photon source designs by suppressing background emission using concentric rings. https://arxiv.org/abs/2307.03619

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