Reproducibility of High-Performance Quantum Dot Single-Photon Sources,ACS Photonics

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Reproducibility of High-Performance Quantum Dot Single-Photon Sources
ACS Photonics ( IF 6.5 ) Pub Date : 2020-03-02 , DOI: 10.1021/acsphotonics.9b01805
Hélène Ollivier ₁ , Ilse Maillette de Buy Wenniger ₁ , Sarah Thomas ₁ , Stephen C. Wein ₂ , Abdelmounaim Harouri ₁ , Guillaume Coppola ₁ , Paul Hilaire ₁ , Clément Millet _{1,

3} , Aristide Lemaître ₁ , Isabelle Sagnes ₁ , Olivier Krebs ₁ , Loïc Lanco _{1,

3} , Juan C. Loredo ₁ , Carlos Antón ₁ , Niccolo Somaschi ₄ , Pascale Senellart ₁

Affiliation

Single-photon sources based on semiconductor quantum dots have emerged as an excellent platform for high efficiency quantum light generation. However, scalability remains a challenge since quantum dots generally present inhomogeneous characteristics. Here we benchmark the performance of 15 deterministically fabricated single-photon sources. They display an average single-photon purity of 95.4% ± 1.5% with an average mean wavepacket overlap of 88.0% ± 3.1% corresponding to a single-photon indistinguishability of 92.2% ± 2.6% and high homogeneity in operation wavelength and temporal profile. Each source also has state-of-the-art brightness with an average first lens brightness value of 13.6% ± 4.4%. While the highest brightness is obtained with charged quantum dots, the highest quantum purity is obtained with neutral ones. We also introduce various techniques to identify the nature of the emitting state. Our study sets the groundwork for large-scale fabrication of identical sources.

中文翻译：

高性能量子点单光子源的重现性

基于半导体量子点的单光子源已经成为高效量子光产生的绝佳平台。但是，可伸缩性仍然是一个挑战，因为量子点通常呈现不均匀的特性。在这里，我们对15个确定制造的单光子源的性能进行基准测试。它们显示出95.4％±1.5％的平均单光子纯度和88.0％±3.1％的平均平均波包重叠，对应于92.2％±2.6％的单光子可分辨性，并且在操作波长和时间剖面上具有很高的均匀性。每个光源还具有最先进的亮度，平均第一镜头亮度值为13.6％±4.4％。使用带电量子点可获得最高亮度，而使用中性量子点可获得最高量子纯度。我们还介绍了各种技术来识别发射状态的性质。我们的研究为大规模制造相同来源奠定了基础。

更新日期：2020-04-23

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