| 基于柔性超材料的宽频带太赫兹类EIT效应研究 |
| 投稿时间：2024-09-10 修订日期：2024-09-21 点此下载全文 |
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| 中文摘要:本文设计了一种由单杆型谐振器和两个长方形开口环型谐振器组成的超材料微结构。研究了柔性超材料结构的宽带宽类EIT效应及慢光效应，获得了最大透过率为为86.96%，相对带宽为64.14%的透明窗口以及3.20ps的慢光群延迟。当石墨烯的费米能级从0eV增大到1eV时，光透过率由86.96%降低到28.9%，调制深度为66.7%。另外，当微结构表面覆盖折射率从1.0~1.8厚为5μm的分析物时，该微结构的折射率传感灵敏度为77.93GHz/RIU。本文的研究或可为在THz波段实现主动调控宽带宽类EIT效应以及高灵敏度折射率传感器件给予新的方向。 |
| 中文关键词:类EIT效应 太赫兹 柔性超材料 石墨烯 折射率传感 |
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| Study on broad bandwidth EIT-like effect based on the terahertz flexible metamaterials |
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| Abstract:In this paper, a metamaterial microstructure consisting of a single-pole resonator and two rectangular open ring resonators is designed. The wide-bandwidth EIT effect and slow-light effect of the flexible metamaterial structure are studied, the transparent window with a maximum transmittance of 86.96%, a relative bandwidth of 64.14% and a slow-light group delay of 3.20ps are obtained. When the Fermi energy level of graphene increases from 0 eV to 1 eV, the light transmittance decreases from 86.96% to 28.9%, and the modulation depth is 66.7%. In addition, when the surface of the microstructure is covered with an analyte with a refractive index from 1.0~1.8 to a thickness of 5 μm, the refractive index sensing sensitivity of the microstructure is 77.93GHz/RIU. The research in this paper may provide a new direction for realizing the active control of wide-bandwidth EIT effect and high-sensitivity refractive index sensors in the THz band. |
| keywords:terahertz flexible metamaterials graphene Refractive index sensing |
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