Symmetry Breaking in Oligomer Surface Plasmon Lattice Resonances
Symmetry Breaking in Oligomer Surface Plasmon Lattice Resonances
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DOI：
10.1021/acs.nanolett.8b05062
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发表时间：
2019-03-01
期刊：
影响因子：
10.8
通讯作者：
Tasco, Vittorianna
中科院分区：
文献类型：
--
作者：
Esposito, Marco;Todisco, Francesco;Tasco, Vittorianna
我们描述了一种新的等离子体激元模式工程，使结构对称的等离子体激元晶体与金属低聚物作为单位细胞。我们展示了低聚物对称性如何定制散射方向，使其与等离子体阵列的衍射阶方向在空间上重叠。应用到颜色生成领域，所提出的方法能够实现具有挑战性的宽光谱的角度相关的颜色，因为平滑和连续生成的透射鲜艳的颜色，覆盖青-品红-黄色和红-绿-蓝颜色空间，通过散射角度和偏振相关的光学响应来证明。增加对称驱动的控制水平增加了光学信息存储的可能性，对于安全的光学信息编码以及对于纳米光子应用（从解复用器或信号处理设备到片上光学纳米电路）都是潜在的兴趣。
We describe a novel plasmonic-mode engineering, enabled by the structural symmetry of a plasmonic crystal with a metallic oligomer as unit cell. We show how the oligomer symmetry can tailor the scattering directions to spatially overlap with the diffractive orders directions of a plasmonic array. Applied to the color generation field, the presented approach enables the challenging achievement of a broad spectrum of angle-dependent colors since smooth and continuous generation of transmitted vibrant colors, covering both the cyan-magenta-yellow and the red-green-blue color spaces, is demonstrated by scattering angle- and polarization-dependent optical response. The addition of a symmetry driven level of control multiplies the possibility of optical information storage, being of potential interest for secured optical information encoding but also for nanophotonic applications, from demultiplexers or signal processing devices to on-chip optical nanocircuitry.