量子电子学报, 2019, 36 (2): 238, 网络出版: 2019-04-03  

具有可控模式特性的类楔形表面等离子体波导

Wedge-like surface plasmonic waveguide with controllable mode characteristics
作者单位
中国科学技术大学光学与光学工程系, 安徽 合肥 230026
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。
Abstract
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 are 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.

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, 2019, 36(2): 238. YUE Wencheng, YAO Peijun, TAO Runxia, CHEN Xiaolin, MING Hai. Wedge-like surface plasmonic waveguide with controllable mode characteristics[J]. Chinese Journal of Quantum Electronics, 2019, 36(2): 238.

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