Plasmonic grating for circularly polarized outcoupling of waveguide-enhanced spontaneous emission
Plasmonic grating for circularly polarized outcoupling of waveguide-enhanced spontaneous emission
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DOI：
10.1063/5.0085786
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发表时间：
2022-02
影响因子：
4
通讯作者：
I. Fradkin;A. Demenev;V. Kulakovskii;V. Antonov;N. Gippius
中科院分区：
文献类型：
--
作者：
I. Fradkin;A. Demenev;V. Kulakovskii;V. Antonov;N. Gippius
由于其特定的局域表面等离子体，等离子体亚表面形成了一个在纳米尺度上进行光操纵的便利平台。即使有很高的本征焦耳损失，等离子体纳米粒子对于光操纵也是非常有效的。在这里，我们展示了在介质波导上的等离子体纳米颗粒晶格，它有效地将相反传播的导模耦合到不同利手的圆偏振光束。我们证明了80%的圆偏振度的外耦合发射的砷化镓波导嵌入量子点。这些结果使我们能够将晶格看作是一种圆偏振控制的光栅耦合器，并使这种结构有望进一步实现为集成器件的有效耦合接口。
Plasmonic metasurfaces form a convenient platform for light manipulation at the nanoscale due to their specific localized surface plasmons. Even despite high intrinsic Joule losses, plasmonic nanoparticles are very effective for light manipulation. Here, we show the lattice of plasmonic nanoparticles onto a dielectric waveguide that efficiently couples oppositely propagating guided modes to circularly polarized light beams of different handedness. We demonstrate 80% degree of circular polarization for the out-coupled emission of GaAs-waveguide-embedded quantum dots. The results allow us to consider the lattice as a circular-polarization-controlled grating coupler and make this structure prospective for further implementation as an efficient coupling interface for integrated devices.