Emitting-polarization of surface plasmons coupling in metallic nanoantennas
Emitting-polarization of surface plasmons coupling in metallic nanoantennas
复制标题
金属纳米天线中表面等离子体耦合的发射偏振
DOI：
10.1088/2040-8986/aa97c9
复制
发表时间：
2018
影响因子：
2.1
通讯作者：
Li Zhipeng
中科院分区：
文献类型：
--
作者：
Yang Longkun;Li Pan;Li Zhipeng
金属纳米天线的表面等离子体耦合在纳米尺度的光操纵中发挥着重要作用。在这项工作中，我们通过发射偏振相关测量（在非偏振激发下）揭示了表面等离子体激元耦合。通过检测不同发射偏振角下的散射，可以很好地揭示表面等离子体激元耦合模式（共振位置和优先偏振方向），这不仅可以提供纳米天线发射的偏振态，还可以提高表面等离子体激元模式的峰值分辨率，特别是当这些模式彼此正交偏振时。发射偏振很大程度上取决于表面等离子体耦合，并且耦合的纳米天线可以在不同的谐振波长下充当偏振光发射器。这些结果对于光与等离子体纳米结构之间相互作用的基本理解以及用于光操纵和传感应用的纳米光子器件的开发都非常重要。
Surface plasmons coupling of metallic nanoantennas plays an important role in light manipulation at the nanometer scale. In this work, we reveal surface plasmons coupling via emitting-polarization dependent measurements (under unpolarized excitation). By detecting the scattering at different emitting polarization angles, the surface plasmons coupling modes (resonance positions and preferential polarized orientations) can be well revealed, which can not only provide the polarization state of nanoantennas emission but also improve the peaks resolution of surface plasmon modes, especially when these modes are polarized orthogonally with each other. The emission polarization is greatly dependent on the surface plasmons coupling, and the coupled nanoantenna can work as a polarized light emitter at different resonant wavelengths. These results are of high importance for both the fundamental understanding of the interaction between light and plasmonic nanostructures, and the development of nanophotonic devices for light manipulation and sensing applications.