Coherence Converting Plasmonic Hole Arrays
Coherence Converting Plasmonic Hole Arrays
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DOI：
10.1007/s11468-011-9309-1
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发表时间：
2012-06-01
期刊：
影响因子：
3
通讯作者：
Gbur, Greg
中科院分区：
文献类型：
--
作者：
Gan, Choon How;Gu, Yalong;Gbur, Greg
模拟结果表明，全球的光波场的空间相干性的状态可以改变传输通过一个阵列的亚波长大小的孔在金属板，支持表面等离子体。研究发现，出射场的相干状态强烈依赖于空穴之间的间距及其散射强度。我们的研究结果表明，金属薄膜上的亚波长孔阵列可以潜在地用作等离子体辅助相干转换器件，用于修改透射波的方向性、光谱和偏振。
Simulations are presented that demonstrate that the global state of spatial coherence of an optical wavefield can be altered on transmission through an array of subwavelength-sized holes in a metal plate that supports surface plasmons. It is found that the state of coherence of the emergent field strongly depends on the separation between the holes and their scattering strength. Our findings suggest that subwavelength hole arrays on a metal film can be potentially employed as a plasmon-assisted coherence converting device, useful in modifying the directionality, spectrum, and polarization of the transmitted wave.