Enhanced optical transmission through asymmetric nanostructured gold films

被引：5
作者：
Shi, Lina [1 ]
Li, Hailiang [1 ]
Du, Yuchan [1 ]
Xie, Changqing [1 ]
机构：
[1] Chinese Acad Sci, Key Lab Nanofabricat & Novel Devices Integrated T, Inst Microelect, Beijing 100029, Peoples R China
来源：
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 2012年 / 29卷 / 12期
基金：
中国国家自然科学基金;
关键词：
SURFACE-PLASMON-POLARITONS; THIN METAL-FILMS; HOLE ARRAYS; LIGHT; NANOPARTICLES; PARTICLE; FIELD; SCATTERING; CRYSTALS;
D O I：
10.1364/JOSAB.29.003377
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We investigate optical properties of a gold structure comprising a two-dimensional array of gold nanoblocks placed on top of a thin gold film. We observe enhanced transmission through asymmetric nanostructured gold films, which can be attributed to the surface plasmon (SP) mode at the air-gold interface leaking to the substrate when the substrate index is larger than the superstrate index. When the substrate and superstrate are the same dielectric, the SPs at both superstrate-gold and gold-substrate interfaces strongly interact with each other and even and odd SPs are then excited. In addition, we investigate effects of oblique incidence and electronic interband transition on SP resonances. Our results provide a guideline for engineering novel devices with enhanced transmission based on nanostructures. (c) 2012 Optical Society of America
引用
收藏
页码：3377 / 3385
页数：9
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