发表机构
University of Waterloo; Institute for Quantum Computing, University of Waterloo; Quantum-Nano Fabrication and Characterization Facility, University of Waterloo; National Research Council Canada; Queen’s University（滑铁卢大学; 滑铁卢大学量子计算研究所; 滑铁卢大学量子纳米加工与表征设施; 加拿大国家研究委员会; 女王大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究开发确定性拾取-放置技术实现纳米线量子点垂直转移，制成光子提取效率75%、波长可调且发射质量高的器件，为规模化量子光子源奠定基础。
AI 中文摘要
半导体量子点（QDs）是实现光子量子技术用明亮、波长可调谐的单光子及纠缠光子对源的领先平台。位点选择纳米线量子点（NWQDs）是可规模化制造此类光子器件的有前景平台，但在保持光子纳米线垂直生长几何结构的同时，在其周围集成额外结构仍是一项挑战。本研究开发了一种确定性拾取-放置技术，用于将NWQDs从生长衬底垂直转移至任意模板；利用该转移技术，通过集成底部金反射镜，将光子提取效率提升至75%，并通过在QD周围集成静电栅极，将发射波长调谐3.6 GHz。重要的是，在转移后测得QD发射的低多光子概率（g^(2)(0)=0.002）和高不可区分性（±100 ps范围内>80%），从而获得了高质量器件。这些结果证明了所开发转移技术的可重复性和通用性，是实现可规模化单光子及纠缠光子源的关键一步。
英文摘要
Semiconductor quantum dots (QDs) are a leading platform for realising bright, wavelength-tunable sources of single and entangled photon pairs for photonic quantum technologies. Site-selected nanowire quantum dots (NWQDs) are a promising platform for fabricating such photonic devices in a scalable manner. However, implementing additional structures around the photonic nanowire while maintaining its vertical growth geometry has remained a challenge. In this work, we develop a deterministic pick-and-place technique to conduct a vertical-to-vertical transfer of NWQDs from the growth substrate to arbitrary templates. Using this transfer technique, we enhance the photon extraction efficiency to 75% by implementing a bottom gold mirror and tune the emission wavelength by 3.6 GHz via implementing electrostatic gates around the QD. Importantly, we measure low-multiphoton probability (g^(2)(0) = 0.002) and high indistinguishability (>80% for +/-100 ps) of the QD emission after the transfer process, yielding high-quality devices. These results demonstrate the repeatability and versatility of the developed transfer technique, which is an enabling step towards scalable single and entangled photon sources.
CommentsMain: 26 pages, 5 figures SI: 16 pages, 13 figures
