太赫兹科学与电子信息学报2024，Vol.22Issue(7)：689-694,702,7.DOI:10.11805/TKYDA2024096
太赫兹全金属超构表面的极化无关准BICs研究
Polarization-independent quasi-Bound states In the Continuum based on terahertz all metal metasurfaces
摘要
Abstract
A terahertz(THz)all-metal metasurface with a high Q-factor has been proposed,consisting of four diamond-shaped holes.By altering the size of adjacent diamond-shaped holes,the symmetry of the structure can be broken,resulting in quasi-Bound states In the Continuum(BICs).By changing the polarization angle of the incident wave,the frequency of the excited quasi-BICs remains unchanged,exhibiting polarization-independent characteristics.Simulation results show that,by optimizing structural parameters,when the size deviation is 3 μm,the quasi-BICs achieved an ultra-narrow bandwidth of less than 1 GHz,corresponding to a Q-factor greater than 1 300.Experimental test results show that the fabricated sample(with a deviation of 30 μm)had a measured Q-factor of 40.Compared to circular hole structures,the diamond-shaped hole structure can achieve stronger bound fields due to its sharp corners.The proposed metasurface with polarization-independent quasi-BICs has enormous practical application potential in real-time chemical and biomolecular sensing.关键词
太赫兹/超构表面/全金属/极化无关/连续域束缚态Key words
terahertz/metasurfaces/all-metal/polarization-independent/Bound states In the Continuum分类
数理科学引用本文复制引用
赵正韬,张亚倩,肖中银,刘德君..太赫兹全金属超构表面的极化无关准BICs研究[J].太赫兹科学与电子信息学报,2024,22(7):689-694,702,7.基金项目
国家自然科学基金资助项目(62205211) （62205211）
上海浦江人才资助项目(20PJ1412200) （20PJ1412200）
