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

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 cavi...

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Autores principales: Shunfa Liu, Yuming Wei, Rongling Su, Rongbin Su, Ben Ma, Zesheng Chen, Haiqiao Ni, Zhichuan Niu, Ying Yu, Yujia Wei, Xuehua Wang, Siyuan Yu
Formato: article
Lenguaje:EN
Publicado: Nature Portfolio 2017
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Acceso en línea:https://doaj.org/article/cc978d15ae754721a1433aea8a0ffe0f
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Sumario: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.