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允许度不对称的qBIC超表面用于检测折射率

Xingye Yang¹, Alexander Antonov¹, Haiyang Hu¹

¹Chair in Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, Königinstraße 10, 80539 München, Germany.

Nanophotonics (Berlin, Germany)

|December 22, 2025

概括

这项研究引入了连续 (q-BIC) 超表面中的一种新的允许性-不对称的准束状态,用于增强的折射率 (RI) 传感. 与传统方法相比,这种设计提供了更强大的和线性响应,提高了传感器的准确性.

科学领域:

光子学和元表面学
光学传感技术的技术
纳米光子学纳米光子学

背景情况:

连续体中的受限状态 (BICs) 提供了优越的光限制,但对对称性破坏敏感.
准BICs (q-BICs) 能够实现高质量的因子共振,这对于折射率 (RI) 传感至关重要.
在q-BIC中现有的几何不对称方法限制了对光谱转移的传感响应.

研究的目的:

为增强RI传感开发一种新的允许度不对称的q-BIC (ε-qBIC) 超表面.
为了展示一个能调节共振波长和强度的RI传感机制.
为了提高基于q-BIC的RI传感器的线性和稳定性.

主要方法:

制造一个 ε-qBIC 地表.
响应转移和调制变化的特征与不断变化的RI.
数字模拟来分析几何不对称的q-BIC (g-qBIC) 的光学恢复到BIC条件.

主要成果:

这种 ε-qBIC 超表面的传导率灵敏度达到 ~5,300%/RIU.
ε-qBIC的线性响应窗口比g-qBIC大104倍.
数字结果显示,环境允许性不对称性可以将g-qBIC恢复到超高Q状态 (>10^7),接近BIC.

结论:

ε-qBIC 超表面为 RI 传感提供了显著改进的线性响应,使得单波长读出更可靠.
这种设计为开发高性能光子传感器提供了新的策略.
恢复电容性的BIC的概念为可调节的光子设备开辟了新的途径.

关键词:

在BIC BIC中,我们可以看到.在RSP-BIC中使用RSP.允许度不对称的不对称.检测折射率的感应器折射计检测感应器折射计检测感应器

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