摘要
表面等离子体波导能够突破光的衍射极限,提供亚波长的模式局域性。由于其独特的性质,表面等离子体波导引起了广泛的关注。但是,之前报道的各种表面等离子体波导基本没有涉及到波导结构的可调谐性.这里,我们提出了一种类楔形表面等离子体波导,用有限元方法(FEM)研究了该表面等离子体波导的模式特性。该类楔形表面等离子体波导可以实现超深的亚波长的模式局域性,通过改变波导的结构参数,我们可以对波导的模式局域性和传输损耗进行调控。
Surface plasmon polariton(SPP) waveguides have been paid extensive attention for their unique properties, such as breaking the diffraction limit of light and providing subwavelength mode confinement.Surface plasmonic waveguides proposed before scarcely involve the tunability of the mode confinement and propagation loss by adjusting the geometric parameters. Here, a wedge-like surface plasmonic waveguide is proposed and its properties are investigated by finite element method(FEM). The wedge-like surface plasmonic waveguide features ultra-deep subwavelength mode confinement. The mode confinement and attenuation of the wedge-like surface plasmonic waveguide axe controllable by adjusting the waveguide parameters, which makes the wedge-like surface plasmonic waveguide more flexible and could meet different requirements for mode area and propagation length at the same wavelength.
作者
岳文成
姚培军
陶润夏
陈小林
明海
YUE Wencheng;YAO Peijun;TAO Runxia;CHEN Xiaolin;MING Hai(Department of Optics and Optical Engineering, University of Science and Technology ofChina, Hefei 230026, China)
出处
《量子电子学报》
CAS
CSCD
北大核心
2019年第2期238-242,共5页
Chinese Journal of Quantum Electronics
基金
国家自然科学基金
61177053
国家重点基础研究项目
2012CB922003
安徽省自然科学基金项目
1508085SMA205~~
关键词
纤维与波导光学
可控模式特性
有限元方法
表面等离子体
fiber and waveguide optics
controllable mode characteristics
finite element method
surface plasmon polariton
