双调谐超材料中的多波段模拟电磁诱导透明

Multi-Band Analogue Electromagnetically Induced Transparency in DoubleTuned Metamaterials.

作者信息

Huang Wei, He Ningye, Ning Renxia, Chen Zhenhai

机构信息

State Key Laboratory of ASIC and System, Shanghai Institute of Intelligent Electronics & Systems, School of Microelectronics, Fudan University, Shanghai 200433, China.

School of Information Engineering, Huangshan University, Huangshan 245041, China.

出版信息

Nanomaterials (Basel). 2021 Oct 21;11(11):2793. doi: 10.3390/nano11112793.

DOI:10.3390/nano11112793

PMID:34835557

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8624658/

Abstract

A multi-band analogue electromagnetically induced transparency (A-EIT) metamaterial is proposed. The structure is composed of liquid crystal (LC) layer and a graphene strips layer on both sides of silicon dioxide. The transmission spectrum and electric field distribution of only one graphene strip and two graphene strips have been studied. As a bright mode, the graphene strip is coupled with adjacent graphene strip to realize the A-EIT effect. When multiple graphene strips are coupled with each other, the multi-band A-EIT is obtained due to the electric dipole resonances of the four strips. The results show that the multiband A-EIT effect can be tuned by voltage on LC and graphene layer, respectively. Moreover, changing the incident angle of the electromagnetic wave has had little influence on the transmission window in the low frequency band, it is meaning that the A-EIT effect with insensitive to the incident angle can be obtained. Each transmission window has a high maximum transmittance and figure of merit (FOM). The multi-band A-EIT effect can widen the application on sensor and optical storage devices.

摘要

提出了一种多波段模拟电磁诱导透明（A-EIT）超材料。该结构由液晶（LC）层和二氧化硅两侧的石墨烯条带层组成。研究了仅一个石墨烯条带和两个石墨烯条带的透射光谱和电场分布。作为一个亮模式，石墨烯条带与相邻的石墨烯条带耦合以实现A-EIT效应。当多个石墨烯条带相互耦合时，由于四个条带的电偶极共振而获得多波段A-EIT。结果表明，多波段A-EIT效应可以分别通过液晶层和石墨烯层上的电压进行调节。此外，改变电磁波的入射角对低频带的透射窗口影响很小，这意味着可以获得对入射角不敏感的A-EIT效应。每个透射窗口都有较高的最大透射率和品质因数（FOM）。多波段A-EIT效应可以拓宽在传感器和光存储设备上的应用。