期刊
OPTICAL MATERIALS EXPRESS
卷 1, 期 3, 页码 391-399出版社
OPTICAL SOC AMER
DOI: 10.1364/OME.1.000391
关键词
-
资金
- National Science Foundation of China [61028011, 61007034, 60977064]
- U.S. National Science Foundation
- Tianjin Sci-Tech Program [09ZCKFGX01500, 10JCYBJC01400]
- MOE of China [B07014]
We investigate the effect of tweaking the quality (Q) factor of split ring resonators in a coupled state, giving rise to plasmonic induced transparency (PIT) which has two distinct, individually engineered resonance modes. The Q factor and the amplitude of each resonance are tuned by twisting them mutually in the unit cell consisting of a subradiant and a superradiant resonator. We experimentally observe that introducing a gradual twist in the three U-shape resonators has a dramatic impact on the PIT spectral response, leading to the disappearance of the transparency peak beyond a certain critical degree of twist. This mainly happens due to the change in the in-plane coupling between the resonators as well the variation in coupling of the twisted resonators with the incident electric field. Further investigation based on the Fano model provides good agreement with the experimental results. The scheme presented here for controlling the Q factor of each resonator in the coupled regime is a unique way to tune the PIT response in terahertz metamaterials and can be easily scaled across the entire electromagnetic spectrum. (C) 2011 Optical Society of America
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据