Size dependence of band-gaps in a one-dimensional plasmonic crystal

被引：20
|
作者：
Watanabe, Hiroaki [1 ]
Honda, Masahiro [1 ]
Yamamoto, Naoki [1 ]
机构：
[1] Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan
来源：
OPTICS EXPRESS | 2014年 / 22卷 / 05期
关键词：
POLARITONS; WAVES;
D O I：
10.1364/OE.22.005155
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The dependence of the plasmonic band gap on size of a onedimensional plasmonic crystal with a rectangular cross-section has been investigated by cathodoluminescence, using a 200-keV scanning transmission electron microscope. The band edge character at points G and X changes in correlation with the corresponding Fourier component of the surface shape. The calculation by the rigorous coupled-wave analysis (RCWA) method reproduces well the observed size dependence of the band edge energies on terrace width and height, though some deviation in magnitude remains. The beam-scan spectral images clearly reveal symmetric and anti-symmetric characters of the standing waves of the band edge modes. The two modes at the band edges are different in the surface plasmon Polariton (SPP)-light conversion efficiency and exchange their energy positions by changing terrace width. (c) 2014 Optical Society of America
引用
收藏
页码：5155 / 5165
页数：11
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