Index-of-refraction sensors: virtually unlimited sensing power at the critical angle.
Index-of-refraction sensors: virtually unlimited sensing power at the critical angle.
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DOI：
10.1364/sensors.2010.jtha10
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发表时间：
2006-01
期刊：
影响因子：
3.6
通讯作者：
R. Micheletto;Y. Kawakami;Katsumi Hamamoto;Shoji Kawai
中科院分区：
文献类型：
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作者：
R. Micheletto;Y. Kawakami;Katsumi Hamamoto;Shoji Kawai
为了改进和简化折射率传感器，我们确定了临界角的基本工作模式。对折射率的灵敏度比标准的表面等离子体共振传感器更高，我们已经能够解析地证明它实际上是一个无界的值。我们描述了这种方法，并提交了一份完整的分析研究，证明了它的无限感知能力。为了测试这种方法，我们构建了一个经济而基本的传感器。尽管它很简单，但据我们所知，我们展示的辨别能力约为10(-6)，接近有史以来最好的灵敏度。这种检测方法普遍适用于任何光学系统，并可能为下一代光学传感器件铺平道路。
In an effort to improve and simplify refractive index sensors, we identified a basic operation mode at the critical angle. Sensitivity to the refractive index is higher than in standard surface plasmon resonance sensors, and we have been able to demonstrate analytically that it is virtually an unbounded value. We describe this approach and submit a complete analytical study demonstrating its unlimited sensing power. To test the approach, we constructed an economical and basic sensor. Despite its simplicity, we demonstrated the discrimination capability to be of the order of 10(-6), as far as we know close to the best sensitivity ever recorded. This detection method is generally applicable to any optical system and may pave the way for the next generation of optical sensing devices.