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基于荧光成像方法的提取效率大于65%的确定性量子点微柱单光子源。

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

作者信息

Liu Shunfa, Wei Yuming, Su Rongling, Su Rongbin, Ma Ben, Chen Zesheng, Ni Haiqiao, Niu Zhichuan, Yu Ying, Wei Yujia, Wang Xuehua, Yu Siyuan

机构信息

State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, School of Physics, Sun Yat-sen University, Guangzhou, 510275, China.

State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, P.O. Box 912, Beijing, 100083, China.

出版信息

Sci Rep. 2017 Oct 25;7(1):13986. doi: 10.1038/s41598-017-13433-w.

DOI:10.1038/s41598-017-13433-w
PMID:29070846
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5656632/
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(0) = 0.144 ± 0.012) at this collection efficiency.

摘要

我们报告了使用优化的光致发光成像方法，在平面分布布拉格反射器（DBR）腔中对单量子点（QD）进行光学定位，平均位置不确定度约为20纳米。我们基于这些量子点在确定的微柱腔中创建单光子源。量子点荧光的亮度在与腔的基模共振时大大增强，导致在数值孔径为0.65的透镜中具有68%±6%的高提取效率，并且在这种收集效率下同时表现出低多光子概率（g(0)=0.144±0.012）。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cd7/5656632/0307261ca90c/41598_2017_13433_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cd7/5656632/47150eebbcac/41598_2017_13433_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cd7/5656632/35c3468e9d21/41598_2017_13433_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cd7/5656632/da763d84e892/41598_2017_13433_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cd7/5656632/0307261ca90c/41598_2017_13433_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cd7/5656632/47150eebbcac/41598_2017_13433_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cd7/5656632/35c3468e9d21/41598_2017_13433_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cd7/5656632/da763d84e892/41598_2017_13433_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cd7/5656632/0307261ca90c/41598_2017_13433_Fig4_HTML.jpg

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