Tunable terahertz group slowing effect with plasmon-induced transparency metamaterial

被引：5
|
作者：
Wang, Baoku [1 ]
Guo, Tong [1 ]
Gai, Ke [1 ]
Yan, Fei [2 ]
Wang, Ruoxing [3 ]
Li, Li [1 ]
机构：
[1] Harbin Engn Univ, Key Lab In Fiber Integrated Opt Minist Educ, Harbin 150001, Peoples R China
[2] Harbin Inst Technol, Natl Key Lab Sci & Technol Tunable Laser, Harbin 150081, Peoples R China
[3] North China Elect Power Univ, Dept Math & Phys, Baoding 071003, Peoples R China
来源：
APPLIED OPTICS | 2022年 / 61卷 / 11期
关键词：
LIGHT; OPTICS;
D O I：
10.1364/AO.452374
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present a tunable plasmon-induced transparency (PIT) metamaterial for manipulating the group velocity of terahertz (THz) waves. The metamaterial is composed of metal split rings and photoconductive silicon strips. The strong PIT effect with slowing down THz waves is generated by the bright-bright mode coupling between the high-order plasmon mode and the lattice surface mode via electromagnetic destructive interference. By varying the conductivity of silicon strips, the group slowing performance is dynamically tunable. The group delay can achieve beyond 20 ps with the group index as high as 592, showing the promising application for THz signal manipulation. (C) 2022 Optica Publishing Group
引用
收藏
页码：3218 / 3222
页数：5
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