期刊
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
卷 39, 期 4, 页码 594-599出版社
Optica Publishing Group
DOI: 10.1364/JOSAA.452393
关键词
-
类别
资金
- Graduate Innovative Special Fund Projects of Jiangxi Province [YC2020-S312]
- Natural Science Foundation of Jiangxi Province [20192BAB212003, 20202ACBL212005, 20202BABL201019]
- National Natural Science Foundation of China [11804093, 11847026, 12164018, 61764005]
This paper proposes a simple monolayer graphene metamaterial based on silicon/silica substrates, which achieves typical triple-plasmon-induced transparency (PIT) in the terahertz band. The physical mechanism is analyzed using coupled mode theory (CMT), and the results are in good agreement with finite-difference time-domain simulation. By dynamic tuning, a multimode electro-optical switch can be designed with high modulation degrees of its resonant frequencies. Additionally, the graphene metamaterial exhibits slow light effects with a group index reaching 770 at Ef = 0.8 eV. These results are of great significance for the research and design of electro-optical switches and slow light devices in the terahertz band.
A simple monolayer graphene metamaterial based on silicon/silica substrates is proposed, and typical triple-plasmon-induced transparency (PIT) is realized in the terahertz band. The physical mechanism is analyzed by coupled mode theory (CMT), and the results of CMT agree well with the finite-difference time-domain simulation. A multimode electro-optical switch can be designed by dynamic tuning, and the modulation degrees of its resonant frequencies are 84.0%, 87.3%, 83.0%, 88.1%, and 76.7%. In addition, triple-PIT gradually degenerates into dual-PIT with a decrease in the length of one bright mode. Interestingly, the group index can reach 770 at Ef = 0.8 eV, which shows that it can be designed as a slow light device with extraordinary ability. Therefore, the results of this paper are of great significance to the research and design of electro-optical switches and slow light devices in the terahertz band. (C) 2022 Optica Publishing Group
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