非对称针尖结构对远红外超材料谐振性能的影响研究
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上海理工大学 光电信息与计算机工程学院,上海 200093

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O434.3

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Asymmetric tip design for far infrared metamaterial sensor
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School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

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Supported by the National Key Research and Development Program of China (2022YFA1404004, 2023YFF0719200); the National Natural Science Foundation of China (61805140, 62335012, 61988102).

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    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。

    Abstract:

    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 factor 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 optimization approach to enhance the Q factor of conventional split ring metamaterials.

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陆小森,吴旭,魏小柯,王俊杰,王奇亮,金钻明,彭滟.非对称针尖结构对远红外超材料谐振性能的影响研究[J].红外与毫米波学报,2024,43(3):324~330]. LU Xiao-Sen, WU Xu, WEI Xiao-Ke, WANG Jun-Jie, WANG Qi-Liang, JIN Zuan-Ming, PENG Yan. Asymmetric tip design for far infrared metamaterial sensor[J]. J. Infrared Millim. Waves,2024,43(3):324~330.]

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  • 收稿日期:2023-09-19
  • 最后修改日期:2024-04-22
  • 录用日期:2024-01-12
  • 在线发布日期: 2024-04-12
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