Near-field plasmonic beam engineering with complex amplitude modulation based on metasurface
Near-field plasmonic beam engineering with complex amplitude modulation based on metasurface
复制标题
基于超表面的复杂幅度调制近场等离子体束工程
DOI：
10.1063/1.5013327
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发表时间：
2018-02-12
影响因子：
4
通讯作者：
Wang, Yongtian
中科院分区：
文献类型：
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作者：
Song, Xu;Huang, Lingling;Wang, Yongtian
超表面由于其能够局域地操控电磁波，为定制传播波和表面等离激元极化激元（SPPs）提供了极大的可行性，因而最近引起了广泛关注。在集成纳米光子学中，对具有任意复杂场的SPPs进行操控是一个重要问题，因为它们能够引导具有亚波长尺度的波。在此，提出了一种由纳米孔径阵列构成的超表面方法，并通过实验证明该方法能够在近场区域有效地操控SPPs的复振幅。通过调整单个纳米孔径的方位角并同时调节其几何参数，基于潘查拉特纳姆 - 贝里相位及其各自的传输系数来控制相位和振幅。为了验证这一概念，产生了艾里等离激元和轴对称艾里 - SPPs。数值模拟结果和近场成像结果相互一致。除了严格的模拟之外，我们还应用了二维偶极子分析进行额外分析。这种利用超表面进行复振幅操控的策略可用于等离激元光束整形、集成光电系统和表面波全息术等潜在应用。由美国物理联合会出版社出版。
Metasurfaces have recently intrigued extensive interest due to their ability to locally manipulate electromagnetic waves, which provide great feasibility for tailoring both propagation waves and surface plasmon polaritons (SPPs). Manipulation of SPPs with arbitrary complex fields is an important issue in integrated nanophotonics due to their capability of guiding waves with subwavelength footprints. Here, an approach with metasurfaces composed of nanoaperture arrays is proposed and experimentally demonstrated which can effectively manipulate the complex amplitude of SPPs in the near-field regime. Tailoring the azimuthal angles of individual nanoapertures and simultaneously tuning their geometric parameters, the phase and amplitude are controlled based on the Pancharatnam-Berry phases and their individual transmission coefficients. For the verification of the concept, Airy plasmons and axisymmetric Airy-SPPs are generated. The results of numerical simulations and near-field imaging are consistent with each other. Besides the rigorous simulations, we applied a 2D dipole analysis for additional analysis. This strategy of complex amplitude manipulation with metasurfaces can be used for potential applications in plasmonic beam shaping, integrated optoelectronic systems, and surface wave holography.Metasurfaces have recently intrigued extensive interest due to their ability to locally manipulate electromagnetic waves, which provide great feasibility for tailoring both propagation waves and surface plasmon polaritons (SPPs). Manipulation of SPPs with arbitrary complex fields is an important issue in integrated nanophotonics due to their capability of guiding waves with subwavelength footprints. Here, an approach with metasurfaces composed of nanoaperture arrays is proposed and experimentally demonstrated which can effectively manipulate the complex amplitude of SPPs in the near-field regime. Tailoring the azimuthal angles of individual nanoapertures and simultaneously tuning their geometric parameters, the phase and amplitude are controlled based on the Pancharatnam-Berry phases and their individual transmission coefficients. For the verification of the concept, Airy plasmons and axisymmetric Airy-SPPs are generated. The results of numerical simulations and near-field imaging are consistent with each...