Integration of a single III-V quantum dot with a plasmonic nanoantenna is still underexplored as a means towards efficient single-photon sources. Here, we propose two new concepts based on a nanowire quantum dot (NWQD) emitter coupled with a plasmonic bowtie antenna and an NWQD-plasmonic metal hybrid structure. Based on finite element method modeling, we show how these devices can achieve an enhancement in single-photon emission rate and directional radiation. The plasmonic bowtie can increase the spontaneous emission of NWQD with a small diameter, overcoming their otherwise dominating intrinsic spontaneous emission suppression. Further, the NWQD-plasmonic hybrid structure can act as a single-mode waveguide. These features would facilitate nano-photonic device integration as desired for applications of bright single-photon sources, plasmonic lasers, and on-chip opto-electronic nanodevices.

中文翻译：

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纳米线量子点耦合到等离子体纳米天线的高效单光子发射

将单个 III-V 量子点与等离子体纳米天线的集成作为实现高效单光子源的手段仍未得到充分探索。在这里，我们提出了两个基于纳米线量子点 (NWQD) 发射器与等离子体蝴蝶结天线和 NWQD-等离子体金属混合结构耦合的新概念。基于有限元方法建模，我们展示了这些设备如何实现单光子发射率和定向辐射的增强。等离子体领结可以增加小直径 NWQD 的自发发射，克服它们在其他方面占主导地位的内在自发发射抑制。此外，NWQD-等离子体混合结构可以作为单模波导。这些特征将促进纳米光子器件的集成，以满足明亮单光子源应用的需要，