Extraordinary optical transmission through a subwavelength composite hole-pillar array  

作　　者：邵伟佳 李为民 许小亮 王会杰 吴以治 郁菁 

机构地区：[1]National Synchrotron Radiation Laboratory and School of Nuclear Science and Technology,University of Science and Technology of China [2]Department of Physics, University of Science and Technology of China

出　　处：《Chinese Physics B》2014年第11期483-488,共6页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.51272246);the Scientific and Technological Research Foundation of Anhui Province,China(Grant No.12010202035)

摘　　要：We numerically investigate the transmission properties of a subwavelength composite hole-pillar array. As the radius of the pillar increases, the transmission properties experience a complex evolution. It is found that the magnetic dipole resonance of the pillar suppresses the surface plasmon polariton resonance （SPPR） at the gold-air interface. There are two strong transmission peaks associated with the magnetic dipole resonance of pillar and SPPR at the gold-silica interface. A peak associated with magnetic quadrupole resonance of the pillar is observed. Moreover, there is a weak peak associated with the coupling between the whispering-gallery plasmon （WGP） mode and magnetic dipole. Our work is helpful for making a dual band optical filter.We numerically investigate the transmission properties of a subwavelength composite hole-pillar array. As the radius of the pillar increases, the transmission properties experience a complex evolution. It is found that the magnetic dipole resonance of the pillar suppresses the surface plasmon polariton resonance （SPPR） at the gold-air interface. There are two strong transmission peaks associated with the magnetic dipole resonance of pillar and SPPR at the gold-silica interface. A peak associated with magnetic quadrupole resonance of the pillar is observed. Moreover, there is a weak peak associated with the coupling between the whispering-gallery plasmon （WGP） mode and magnetic dipole. Our work is helpful for making a dual band optical filter.

关 键 词：surface plasmon polariton resonance （SPPR） TRANSMISSION optical filter 

分 类 号：O53[理学—等离子体物理]