Terahertz multimode modulator based on tunable triple-plasmon-induced transparency in monolayer graphene metamaterials

被引：28

作者：

Zhuo, Shanshan ^{[1
]}

Zhou, Fengqi ^{[1
]}

Liu, Yanli ^{[2
]}

Liu, Zhimin ^{[1
]}

Zhang, Xiao ^{[1
]}

Luo, Xin ^{[1
]}

Qin, Yipeng ^{[1
]}

Yang, Guangxin ^{[1
]}

Ji, Cheng ^{[1
]}

Zhou, Zizhuo ^{[1
]}

Sun, Liwen ^{[1
]}

Liu, Ting ^{[1
]}

机构：

[1] East China Jiaotong Univ, Sch Sci, Nanchang 330013, Jiangxi, Peoples R China

[2] Shanghai Dianji Univ, Sch Elect Informat, Shanghai 201306, Peoples R China

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION | 2022年 / 39卷 / 04期

基金：

中国国家自然科学基金;

关键词：

ELECTROMAGNETICALLY INDUCED TRANSPARENCY; ABSORBER; SWITCH; ANALOG;

D O I：

10.1364/JOSAA.452393

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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

引用

页码：594 / 599

页数：6

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