| 银膜表面周期性条纹导致的沟槽等离激元增强效应 |
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| 引用本文： | 黄姗,方哲宇,林峰,朱星.银膜表面周期性条纹导致的沟槽等离激元增强效应[J].电子显微学报,2009,28(2). |
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| 作者姓名： | 黄姗 方哲宇 林峰 朱星 |
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| 作者单位： | 1. 北京大学物理学院,北京,100871
2. 北京大学物理学院,北京,100871;国家纳米中心,北京,100190 |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展规划(973计划) |
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| 摘 要： | 沟槽等离激元是一种电磁振荡,它束缚于刻在金属表面截面为单个波长尺度的沟槽里,并沿着沟槽传播.沟槽等离激元由于其低传播损耗及可控的传播方向,在集成光路上有潜在的应用,因而受到人们的关注.本文作者在银膜表面刻沟槽,并在沟槽两侧加上周期性结构,并研究了这种周期性结构对沟槽等离激元的耦合和传播的影响.通过扫描近场光学显微镜观察,发现相对于没有周期性结构的沟槽,有周期性结构的情况下,传播于沟槽中的沟槽等离激元强度增强.同时还利用有限时域差分方法计算模拟了相应的过程.模拟结果与实验相符,证明了确实是由于周期性结构导致了沟槽等离激元的增强效应.
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| 关 键 词： | 沟槽等离激元 增强效应 |
Enhancement of channel plasmon polaritons propagating in the silver groove surrounded by periodic surface corrugations |
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| HUANG Shan,FANG Zhe-yu,LIN Feng,ZHU Xing.Enhancement of channel plasmon polaritons propagating in the silver groove surrounded by periodic surface corrugations[J].Journal of Chinese Electron Microscopy Society,2009,28(2). |
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| Authors: | HUANG Shan FANG Zhe-yu LIN Feng ZHU Xing |
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| Affiliation: | 1. State key Laboratory for Mesoscopic Physics;School of Physics;Peking University;Beijing 100871;China;2. National center for nanoscience and nanotechnology;Beijing 100190;China |
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| Abstract: | We have experimentally studied the enhancement of channel plasmon polaritons (CPPs) propagating in silver groove surrounded by period corrugations. The result of scanning near-field optical microscope (SNOM) shows that much more CPPs are confined into the silver groove surrounded by periodic corrugations than that without surface corrugations. The subsequent theoretical simulation using the finite difference time domain (FDTD) method verified that the periodic corrugations indeed increase the generation eff... |
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| Keywords: | FDTD |
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