非对称针尖结构对远红外超材料谐振性能的影响研究  

Asymmetric tip design for far infrared metamaterial sensor

作　　者：陆小森 吴旭 魏小柯 王俊杰 王奇亮 金钻明 彭滟[1] LU Xiao-Sen;WU Xu;WEI Xiao-Ke;WANG Jun-Jie;WANG Qi-Liang;JIN Zuan-Ming;PENG Yan(School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《红外与毫米波学报》2024年第3期322-328,共7页Journal of Infrared and Millimeter Waves

基　　金：the National Key Research and Development Program of China(2022YFA1404004,2023YFF0719200);the National Nat⁃ural Science Foundation of China(61805140,62335012,61988102).

摘　　要：为提高远红外超材料的品质因子Q和检测灵敏度,本文研究了一种用于金属远红外超材料的非对称针尖设计。以传统双开口方形谐振环为模型,通过理论模拟,研究了开口狭缝针尖角度变化对其电场分布、谐振频谱以及品质因子Q的影响。结果表明,非对称针尖增强了谐振环的表面电场局域性,减小了谐振峰的半峰全宽,并使品质因子Q提高到传统谐振环(非针尖设计)的三倍以上。该研究结果为开发高灵敏远红外超材料传感器提供了新的思路,并为传统开口谐振环提出了一种简单实用的Q因子优化方法。This study investigates an asymmetric tip design for a far-infrared metamaterial aimed at enhancing the Q factor and detection sensitivity.Employing the conventional double-split square ring resonator as a model,we conducted theoretical simulations to investigate the impact of different tip angles on the electric field distribution,resonance spectrum,and Q factor.The results show that the asymmetric tip increases the surface electric field of the resonator,decreases the full width at half maximum(FWHM)of the resonance peak,and increases the Q fac⁃tor to over three times that of the conventional split ring.Our findings offer valuable insights for the development of highly sensitive far-infrared metamaterial sensors.Furthermore,we propose a straightforward and practical op⁃timization approach to enhance the Q factor of conventional split ring metamaterials.

关 键 词：太赫兹传感器 超材料 远红外 品质因子Q 

分 类 号：O434.3[机械工程—光学工程]