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

被引：0
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作者：
Shunfa Liu
Yuming Wei
Rongling Su
Rongbin Su
Ben Ma
Zesheng Chen
Haiqiao Ni
Zhichuan Niu
Ying Yu
Yujia Wei
Xuehua Wang
Siyuan Yu
机构：
[1] State Key Laboratory of Optoelectronic Materials and Technologies,
[2] School of Electronics and Information Technology,undefined
[3] School of Physics,undefined
[4] Sun Yat-sen University,undefined
[5] Photonics Group,undefined
[6] Merchant Venturers School of Engineering,undefined
[7] University of Bristol,undefined
[8] State Key Laboratory of Superlattices and Microstructures,undefined
[9] Institute of Semiconductors,undefined
[10] Chinese Academy of Sciences,undefined
[11] P.O. Box 912,undefined
[12] Synergetic Innovation Center of Quantum Information and Quantum Physics,undefined
[13] University of Science and Technology of China,undefined
来源：
Scientific Reports | / 7卷
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摘要：
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.
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