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Resonances of Sandwiched optical antenna
Lisheng Wang,Jiasen Zhang * #,Xiaofei Wu,Jing Yang,Qihuang Gong
Department of Physics, Peking University
*Correspondence author
#Submitted by
Subject:
Funding: 教育部博士点基金,国家自然科学基金,创新群体项目,973项目（No.20040001012,10434020,10521002,2007CB307001）
Opened online:19 December 2007
Accepted by: none
Citation: Lisheng Wang,Jiasen Zhang,Xiaofei Wu.Resonances of Sandwiched optical antenna[OL]. [19 December 2007] http://en.paper.edu.cn/en_releasepaper/content/17169
 
 
We calculate the resonant properties of the sandwiched triangle and bowtie antennas using finite difference time domain technique and compare with one-layer structures. The sandwiched antennas possess two tunable resonances corresponding to the symmetric and antisymmetric modes for dipole excitation, which can be understood by the hybridization of the plasmons supported by the two golden layers of the antennas. We obtain a giant field enhancement and a full width at half maximum as larger as 385 nm for the sandwiched bowtie antenna.
Keywords:Surface plasmons, Optical resonant antenna, Bowtie antenna
 
 
 

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