THIN-FILM CHEMICAL SENSORS WITH WAVEGUIDE ZEEMAN INTERFEROMETRY

P. Ayras, S. Honkanen, K. M. Grace, K. C. Shrouf, P. Katila, M. Leppihalme, A. Tervonen, Xiaoguang Yang, B. Swanson, N. Peyghambarian
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引用次数: 9

Abstract

We describe a highly sensitive chemical sensor scheme using a channel waveguide with a selective surface coating based on polarimetric Zeeman interferometry. The sensing is based on measurement of the phase difference between TE and TM modes propagating in the anisotropic waveguide structure under exposure to toluene vapour. A real-time and reversible response at low ppm level is observed. Modelling results of the sensor structure to further increase its sensitivity are presented.
波导塞曼干涉测量的薄膜化学传感器
我们描述了一种基于偏振塞曼干涉测量的高灵敏度化学传感器方案,该方案使用具有选择性表面涂层的通道波导。传感是基于测量在暴露于甲苯蒸气的各向异性波导结构中传播的TE和TM模式之间的相位差。在低ppm水平下观察到实时和可逆的响应。为进一步提高传感器的灵敏度,给出了传感器结构的建模结果。
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