Investigation of wide-range refractive index sensor based on asymmetric metal-cladding dielectric waveguide structure
Investigation of wide-range refractive index sensor based on asymmetric metal-cladding dielectric waveguide structure
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基于非对称金属包层介质波导结构的宽量程折射率传感器研究
DOI：
10.1063/1.5043469
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发表时间：
2018-10-01
期刊：
影响因子：
1.6
通讯作者：
Wen, Xiaolei
中科院分区：
文献类型：
--
作者：
Wang, Xiangxian;Wu, Xiaoxiong;Wen, Xiaolei
本文提出了一种基于非对称金属包层介质波导结构的折射率传感器，其中被分析物作为导层。模拟了传感器在波导模式共振条件下的角扫描衰减全反射光谱和光场分布，证实了可以采用多种波导模式进行传感，并且在不同的被分析物RI范围内存在不同的波导模式。波导模式共振角和灵敏度随分析物RI的变化曲线表明，不同阶的波导模式组合可以实现较宽的传感范围。该传感器可应用于多种领域，如生物和化学检测。本文提出了一种基于非对称金属包层介质波导结构的折射率传感器，其中被分析物作为导层。模拟了传感器在波导模式共振条件下的角扫描衰减全反射光谱和光场分布，证实了可以采用多种波导模式进行传感，并且在不同的被分析物RI范围内存在不同的波导模式。波导模式共振角和灵敏度随分析物RI的变化曲线表明，不同阶的波导模式组合可以实现较宽的传感范围。该传感器可应用于多种领域，如生物和化学检测。
A refractive index (RI) sensor based on an asymmetric metal-cladding dielectric waveguide structure, in which an analyte is used as the guiding layer, is proposed in this report. The angular scanning attenuated total reflection spectra of the sensor and optical field distributions under waveguide mode resonance conditions were simulated, which confirmed that multiple waveguide modes can be used for sensing, and that different waveguide modes exist in different analyte RI ranges. The curves of both waveguide mode resonance angles and the sensitivity as a function of the analyte RI demonstrated that a wide sensing range can be achieved by combining waveguide modes of different orders. The proposed sensor could be applied to numerous fields, such as biological and chemical detection.A refractive index (RI) sensor based on an asymmetric metal-cladding dielectric waveguide structure, in which an analyte is used as the guiding layer, is proposed in this report. The angular scanning attenuated total reflection spectra of the sensor and optical field distributions under waveguide mode resonance conditions were simulated, which confirmed that multiple waveguide modes can be used for sensing, and that different waveguide modes exist in different analyte RI ranges. The curves of both waveguide mode resonance angles and the sensitivity as a function of the analyte RI demonstrated that a wide sensing range can be achieved by combining waveguide modes of different orders. The proposed sensor could be applied to numerous fields, such as biological and chemical detection.