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紧型三重马赫-泽恩德干扰仪插槽微环共振器,具有超高灵敏度和超宽的检测范围,用于无标签的传感
Optics express
|November 11, 2025
概括
一个新的紧型三重马赫-泽恩德干扰仪槽微环共振器 (MZI-SMRR) 提供超高灵敏度和超宽的检测范围,用于无标签的传感. 这种MZI-SMRR克服了自由光谱范围的限制,使先进的生物传感应用成为可能.
科学领域:
- 光子学和传感技术的技术.
- 集成光学 集成光学 集成光学
- 生物医学工程 生物医学工程
背景情况:
- 微环共振器被广泛用于传感,但由于自由光谱范围 (FSR),其检测范围有限.
- 马赫-泽恩德干扰仪 (MZIs) 提供高灵敏度,但整合起来可能很复杂.
- 无标签检测对于实时监测生物和化学分析剂至关重要.
研究的目的:
- 提出和分析一个紧的三重马赫-泽恩德干扰仪插槽微环共振器 (MZI-SMRR),用于增强无标签传感.
- 为了克服传统微环共振器的FSR限制.
- 为了实现超高灵敏度和超宽检测范围的传感应用.
主要方法:
- 使用转移矩阵方法和合模式理论进行数学建模.
- 使用有限差异时间域 (FDTD) 分析进行数值模拟.
- 三个MZIs与SMRR结构的整合.
主要成果:
- 拟议的MZI-SMRR的尺寸小于50μm × 50μm.
- 实现了超过140nm的准FSR检测范围,比传统的SMRR提高了7倍.
- 对CaCl2和D-葡萄糖的度敏感度证明为~1200 pm/%,RI敏感度为~1008 nm/RIU.
结论:
- 集成的MZI-SMRR设计显著提高了检测范围和灵敏度.
- 这种配置消除了FSR限制,使得高分析剂度的检测成为可能.
- 对于未来的无标签生物传感应用,MZI-SMRR显示出极大的前景.
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