Ultracompact surface-plasmon-polariton splitter based on modulations of quasicylindrical waves to the total field

被引：26
作者：
Chen, Jianjun
Li, Zhi [1 ]
Yue, Song
Gong, Qihuang
机构：
[1] Peking Univ, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China
来源：
JOURNAL OF APPLIED PHYSICS | 2011年 / 109卷 / 07期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1063/1.3564935
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
By coating a metal with a finite-thickness dielectric film, evident differences in the wave-vector magnitude between surface plasmon polaritons (SPPs) and quasicylindrical waves (quasi-CWs) emerge. This brings modulation patterns to the total field on the metal surface near the electromagnetic source. Based on such an effect, an ultracompact SPP splitter with a lateral dimension of only 800 nm is experimentally demonstrated at wavelengths of 740 nm and 832 nm in a dielectric-film-coated asymmetric single nanoslit. These results imply that the additional modulation of quasi-CWs to the total field provide new possibilities for the design of ultracompact plasmonic devices. (C) 2011 American Institute of Physics. [doi:10.1063/1.3564935]
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页数：4
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