期刊
JOURNAL OF OPTICS
卷 21, 期 3, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2040-8986/aaffe2
关键词
metamaterial; near field coupling; slow light; graphene; teraherz
类别
资金
- National Natural Science Foundation of China [61775064, 11847100, 11847132]
- Fundamental Research Funds for the Central Universities [HUST: 2016YXMS024]
- Natural Science Foundation of Hubei Province [2015CFB398, 2015CFB502]
We theoretically and numerically demonstrate an actively tunable slow light in a hybrid metal-graphene metamaterial in the terahertz (THz) regime. In the unit cell, the near field coupling between the metallic elements including the bright cut wire resonator and the dark double split-ring resonator gives rises to a pronounced transmission peak. By positioning a monolayer graphene under the dark mode resonator, an active modulation of the near field coupling is achieved via shifting the Fermi level of graphene. The physical origin can be attributed to the variation in the damping rate of the dark mode resonator arising from the conductive effect of graphene. Accompanied with the actively tunable near filed coupling effect is the dynamically controllable phase dispersion, allowing for the highly tunable slow light effect. This work offers an alternative way to design compact slow light devices in the THz regime for future optical signal processing applications.
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