基于类电磁诱导透明超材料的可调谐慢光器件  

The tunable slow-light device based on electromagnetically induced transparency-like metamaterial

作　　者：沈钊阳 张清河 杨河林[3] 向天宇 SHEN Zhaoyang;ZHANG Qinghe;YANG Helin;XIANG Tianyu(Hubei Province Engineering Technology Research Center for Construction Quality Testing Equipment,China Three Gorges University,Yichang 443002,Hubei Province,China;College of Computer and Information Technology,China Three Gorges University,Yichang 443002,Hubei Province,China;College of Physical Science and Technology,Central China Normal University,Wuhan 430050,China;School of Big Data and Computer Science,Guizhou Normal University,Guiyang 550000,China)

机构地区：[1]三峡大学湖北省建筑质量检测装备工程技术研究中心,湖北宜昌443002 [2]三峡大学计算机与信息学院,湖北宜昌443002 [3]华中师范大学物理科学与技术学院,湖北武汉430050 [4]贵州师范大学大数据与计算机科学学院,贵州贵阳550000

出　　处：《电子元件与材料》2023年第1期36-44,共9页Electronic Components And Materials

基　　金：贵州省科技计划项目(黔科合基础ZK[2021]306);湖北省教育厅科学研究计划指导性项目(B2021311)。

摘　　要：提出并设计了一款能够调控类电磁诱导透明现象的超材料,其单元结构由矩形开缝谐振环和加载变容二极管的开缝金属线组成。当调节变容二极管的电容值时,类电磁诱导透明现象中谐振峰频率会随着电容值的减少往低频方向移动,且对应的幅度值逐渐降低;当电容值降至0.79 pF时,类电磁诱导透明现象消失。通过表面电流分布、双谐振子模型和等效电路模型对其物理特性进行了分析。结合仿真和实验结果证明了该超材料可调谐功能的有效性。通过计算该超材料在不同电容值下的群时延表明其具有良好的慢光效应,因此在设计可调谐的慢光器件中具有潜在应用价值。A tunable electromagnetically induced transparency-like metamaterial was proposed and designed, in which the unit cell was composed of a rectangle split-ring resonator and a cut wire-loaded variode. In the electromagnetically induced transparency-like(EIT-like) phenomenon, the frequency of the resonance peak moves to low frequency with decreasing capacitance, whereas the corresponding amplitude declines. When the capacitance decreases to 0.79 pF, the EIT-like phenomenon disappears. The surface current distributions, the two-oscillator model, and the equivalent circuit model were used to analyze the physical mechanism. Furthermore, the tunability of the proposed metamaterial was demonstrated by the simulated and measured results. The group delay with different capacitances shows perfect slow-light effect, which can be applied to design the tunable slow-light devices.

关 键 词：超材料 电磁诱导透明 可调谐 双谐振子模型 等效电路 慢光器件 

分 类 号：O441.3[理学—电磁学]