基于准BIC的全介电超表面用于超敏感的折射率和温度传感器
Seyedeh Bita Saadatmand1, Vahid Ahmadi2, Seyedeh Mehri Hamidi3
1Faculty of Electrical and Computer Engineering, Tarbiat Modares University, Tehran, Iran.
Scientific reports
|November 23, 2023
概括
这项研究引入了用于THz传感的超表面. 它实现了对折射率和温度测量的超高灵敏度,从而实现了先进的光学应用.
科学领域:
- 光子学和元材料研究
- 特拉赫兹 (THz) 技术技术
- 纳米光子学 纳米光子学
背景情况:
- 超表面为先进的光学设备提供独特的电磁性质.
- 在THz区域的传感应用需要高灵敏度和特异性.
- 完全消电的元表面提供了低损耗和高质量因素.
研究的目的:
- 设计和分析一个全介电超表面,在THz区域同时进行折射率和温度传感.
- 为了研究多重共振的激发,包括磁铁 toroidal 二极管,磁铁 toroidal 四极管和电磁铁 toroidal 二极管.
- 探索在连续性 (BICs) 中与超高质量因子生成的准束状态.
主要方法:
- 一个由盘组成的全介电超表面的数值模拟.
- 使用近场分析和多极分解分析电磁刺激的分析.
- 研究几何参数效应,极化,撞击角度和材料损失.
主要成果:
- 超表面在THz区域同时呈现三种共振.
- 产生了两个带有超高质量因子的准BIC共振.
- 实现了高灵敏度:Sl=569.1 GHz/RIU和Sg=529 GHz/RIU用于磁铁 toroidal 双极;Sl=532 GHz/RIU和Sg=498.3 GHz/RIU用于电磁铁 toroidal 双极.
- 温度灵敏度达到了20.24 nm/°C.
结论:
- 拟议的超表面显示出对液体/气体折射率和温度的优秀传感能力.
- 准BICs的超高质量因素对于高性能传感至关重要.
- 这项工作为THz应用,如光学调制器和生物化学传感器提供了宝贵的平台.
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