具有可控模式特性的类楔形表面等离子体波导

摘要/Abstract

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节性。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的局域性,而且，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。

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

Abstract: Surface plasmon polariton (SPP) waveguides have been paid extensive attention for their unique properties, breaking the diffraction limit of light and providing subwavelength mode confinement. Plasmonic Surface plasmonic waveguides proposed before scarcely involve the tunability of the mode confinement and propagation loss by adjusting the geometric parameters. Here, we propose proposed a wedge-like surface plasmonic waveguide and study studied its properties 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 are controllable by adjusting the waveguide parameters, which makes our wedge-like surface plasmonic waveguide more flexible and could meet different requirements for mode area and propagation length at the same wavelength.

Key words: fiber and waveguide optics, controllable mode characteristics, finite element method, surface plasmon polariton

岳文成，姚培军，陶润夏，陈小林，明海. 具有可控模式特性的类楔形表面等离子体波导[J]. 量子电子学报.

Wencheng Yue, Peijun Yao, Runxia Tao, Xiaolin Chen, Hai Ming. Wedge-like surface plasmonic waveguide with controllable mode characteristics[J]. Chinese Journal of Quantum Electronics.

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