太赫兹辐射
谐振器
分裂环谐振器
光学
Q系数
物理
欧姆接触
太赫兹光谱与技术
材料科学
光电子学
电极
量子力学
作者
Xingyuan Zhang,Wenqiao Shi,Jianqiang Gu,Longqing Cong,Xieyu Chen,Kemeng Wang,Quan Xu,Jiaguang Han,Weili Zhang
出处
期刊:Optics Express
[Optica Publishing Group]
日期:2022-07-18
卷期号:30 (16): 29088-29088
被引量:28
摘要
Bound state in the continuum (BIC) refers to the trapped state in the radiation continuum of a system. In the terahertz band, BIC provides a unique and feasible method to design devices with ultra-high quality factor (Q factor) and to achieve intense terahertz-matter interaction, which is of great value to terahertz science and technology. Here, multiple BICs protected by the resonance symmetry in the terahertz metasurface consisting of metallic split ring resonators (SRR) is demonstrated. The evolution from the BIC to the quasi-BIC (QBIC) is induced by changing the gap width of the SRRs. The proposed BICs are experimentally demonstrated and analyzed by the coupled mode theory along with the numerical simulation. It is found that the leakage behavior of these QBICs is strongly affected by the intrinsic Ohmic loss in the SRRs while it is quite robust to the tilted incidence.
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