摘要
Plasmonic Ag nanowire homotrimer with asymmetrical radii and separations, which exhibits characteristics of multiple plamonic resonances and different electric field distributions, is systematically investigated by means of 2D finite element method. It was found that the dark and bright modes appear in asymmetrical nanowire homotrimer. In addition, when the dark modes appear between the smaller radii of the nanowires, the cascade effect results in enhanced electric field between the smaller radii nanowires. As a result of the appearance of the bright modes between the smaller radii of the nanowires, the restriction of the cascade effect generates enhanced electric field between the bigger nanowires.
作者
李跃
费广涛
许少辉
商国亮
欧阳浩淼
张立德
李跃;费广涛;许少辉;商国亮;欧阳浩淼;张立德(中国科学院合肥物质科学研究院固体物理研究所,中国科学院材料物理重点实验室,安徽纳米材料与技术重点实验室,合肥230031)
