A deterministic quantum dot micropillar single photon source with >65% extraction efficiency based on fluorescence imaging method

Scientific Reports
Shunfa LiuSiyuan Yu

Abstract

We report optical positioning of single quantum dots (QDs) in planar distributed Bragg reflector (DBR) cavity with an average position uncertainty of ≈20 nm using an optimized photoluminescence imaging method. We create single-photon sources based on these QDs in determined micropillar cavities. The brightness of the QD fluorescence is greatly enhanced on resonance with the fundamental mode of the cavity, leading to an high extraction efficiency of 68% ± 6% into a lens with numerical aperture of 0.65, and simultaneously exhibiting low multi-photon probability (g(2)(0) = 0.144 ± 0.012) at this collection efficiency.

References

May 21, 2005·Science·Antonio BadolatoAtac Imamoglu
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Jul 28, 2015·Nature Communications·Luca SapienzaKartik Srinivasan
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Citations

Apr 8, 2020·Light, Science & Applications·Aleksander BoguckiPiotr Kossacki
Mar 28, 2021·Light, Science & Applications·Aleksander BoguckiPiotr Kossacki

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Methods Mentioned

BETA
electron-beam lithography
imaging technique
scanning electron microscopy

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