摘要
提出了一种新型取向诱导的多谐振太赫兹超材料。超材料由双金属线(DCW)和非对称开口环谐振器(ASR)构成。数值仿真表明,当改变SR绕其中心旋转的角度时,导致亮模式和暗模式的耦合作用发生改变,产生不同类型的谐振现象。当SR旋转角为15°时,由于谐振结构对称性被打破,分别在0.67 THz、0.82 THz和0.83 THz出现了类EIT、四偶极子共振和Fano共振现象;当SR旋转角度为90°时,所有共振现象最终消失。此外分析了SR旋转角度为15°时的超材料传感性能,类EIT谐振峰、四偶极子共振和Fano共振灵敏度分别为127、107和108 GHz/RIU。该超材料作为折射率传感器,最大理论灵敏度达到127 GHz/RIU,表明该超材料具良好的传感特性。
In this paper, a novel orientation-induced multi-resonant terahertz metamaterials is proposed. The metamaterials consists of a bimetallic wire(DCW) and an asymmetric split-ring resonator(SR). Numerical simulations show that when the angle of the SR’s rotation around its center is changed, the coupling effect of the bright mode and the dark mode is changed, resulting in different types of resonance phenomena. When the SR rotation angle is 15°, due to the broken resonance structure symmetry, EIT-like, four-dipole resonance and Fano resonance phenomena appear at 0. 67 THz, 0. 82THz and 0. 83 THz, respectively;when the SR rotation angle is 90°, all of the resonance phenomenon eventually disappears. In addition, the metamaterials sensing performance was analyzed when the SR rotation angle was 15°, the EIT-like resonance peak, quadrupole resonance and Fano resonance sensitivity were 127,107 and 108 GHz/RIU, respectively. As a refractive index sensor, the metamaterials has a maximum theoretical sensitivity of 127 GHz/RIU, indicating that the metamaterials has good sensing properties.
作者
王娅茹
王旭娟
吕凯凯
王岩
李院平
梁兰菊
WANG Yaru;WANG Xujuan;LV Kaikai;WANG Yan;LI Yuanping;LIANG Lanju(College of Optoelectronic Engineering,Zaozhuang University,Zaozhuang Shandong 277160,China)
出处
《激光杂志》
CAS
北大核心
2023年第2期42-45,共4页
Laser Journal
基金
国家自然科学基金(No.61701434)
山东省自然科学基金(No.ZR2020FK008)。
关键词
太赫兹超材料
EIT
Fano
四偶极子
传感性能
thz metamaterials
electromagnetically induced transparency
Fano resonance
quadrupole
sensing performance
作者简介
王娅茹(1979-),女,硕士研究生,副教授,研究方向:光电子科学与技术。E-mail:wyr66439@163.com。
