Tunable terahertz slow light of a cavity-integrated guided-mode resonance grating

被引：6
|
作者：
Chen, Chen [1 ]
Yan, Fei [2 ]
Liu, Ziyi [1 ]
Gong, Rui [1 ]
Wang, Ruoxing [1 ]
Li, Li [1 ]
机构：
[1] Harbin Engn Univ, Minist Educ, Key Lab In Fiber Integrated Opt, Harbin 150001, Peoples R China
[2] Harbin Inst Technol, Natl Key Lab Sci & Technol Tunable Laser, Harbin 150080, Peoples R China
来源：
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 2021年 / 38卷 / 05期
关键词：
ELECTROMAGNETICALLY INDUCED TRANSPARENCY; PLASMON-INDUCED TRANSPARENCY; WAVE-GUIDE; GRAPHENE; METAMATERIAL; SENSOR; ANALOG;
D O I：
10.1364/JOSAB.423900
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present a dynamically tunable anomalous electromagnetic induced transparency (EIT) of a cavity-integrated metallic grating by the coupling of guided-mode resonance (GMR) with cavity-mode resonance (CMR) in the terahertz regime. The strong group slowing effect of terahertz waves results from the EIT mechanism under simultaneous excitation of GMR and CMR at a degenerate state. With the introduction of graphene as a functional layer overlying the grating structure, the enhanced group delay can be achievable beyond 6.1 ps with stable operation frequency and signal efficiency by tuning the graphene Fermi level. The work could provide an efficient scheme to manipulate the group velocity of terahertz signals. (C) 2021 Optical Society of America
引用
收藏
页码：1710 / 1716
页数：7
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