金属复合结构的反常透射增强效应的数值分析

利用全矢量的三维时域有限差分法,分析了一种金属银复合结构的反常透射增强效应.该结构是在一层打有六角排列的圆孔阵列的金属银层的上方放置一层六角排列的银圆环阵列构成.与普通的单层银打孔阵列相比,该结构明显具有更高的透射峰值和更窄的透射带宽.系统分析了结构的场强分布、坡印廷矢量能流分布图、透射峰的频率色散关系,结果表明该复合结构激发的更强的独特的表面等离激元模式主导了整个透射过程....

Full description

Saved in:
Bibliographic Details
Published in红外与毫米波学报 Vol. 33; no. 1; pp. 23 - 30
Main Author 李轲 郑厚植
Format Journal Article
LanguageChinese
Published 中国科学院半导体研究所超晶格国家重点实验室,北京,100083 2014
Subjects
亚波长结构
反常透射效应
时域有限差分法
表面等离激元
subwavelength structures
反常透射效应
surface plasmons
时域有限差分法
亚波长结构
extraordinary optical transmission
finite difference time domain method
表面等离激元
Online AccessGet full text
ISSN1001-9014
DOI10.3724/SP.J.1010.2014.00023

Cover

More Information
Summary:利用全矢量的三维时域有限差分法,分析了一种金属银复合结构的反常透射增强效应.该结构是在一层打有六角排列的圆孔阵列的金属银层的上方放置一层六角排列的银圆环阵列构成.与普通的单层银打孔阵列相比,该结构明显具有更高的透射峰值和更窄的透射带宽.系统分析了结构的场强分布、坡印廷矢量能流分布图、透射峰的频率色散关系,结果表明该复合结构激发的更强的独特的表面等离激元模式主导了整个透射过程.
Bibliography:LI Ke, ZHENG Hou-Zhi （ State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors Chinese Academy of Sciences, Beijing 100083, China）
31-1577/TN
Using full-vectorial, three dimensional, finite difference time domain （FDTD） simulator, greatly enhanced ex- traordinary optical transmission （EOT） is studied in a composite metal system, which is constructed by stacking a hexangu- lar annular ring array over a hexangular hole array, perforated in a metallic film. In comparison with conwmtional periodic hole array, perforated in a single metal film, the composite metal system exhibits much stronger transmission amplitude and narrower band width. Such a novel behavior of EOT is well explained by the numerical results obtained from the distribu- tions of electric field intensity, flowing maps of Poynting vectors and frequency dispersions. The results show that strongly excited surface plasmon polaritons （SPP） plays a dominant role in coupling light throughout the composite system.
subwaveleng
ISSN:1001-9014
DOI:10.3724/SP.J.1010.2014.00023