Abstract
Inspired by the classic theory, we suggest that the performance of a D-shaped fiber optical surface plasmon resonance (SPR) sensor can be improved by manipulating the fiber core mode. To demonstrate this, we propose a novel fiber SPR sensor based on a hollow core photonic crystal fiber with liquid mixture filled in the core. The fiber sensor design involves a side-polished fiber with gold film deposited on the polished plane and liquid filling. Numerical simulation results suggest that by tuning the refractive index of the liquid mixture, the predicted sensitivity will be over 6,430 nm/refractive index unit for an aqueous environment, which is competitive for fiber chemical sensing. This optimization method may lead to an ultrahigh sensitivityfiber optical biosensor.
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Acknowledgments
This work is supported by the National Science Foundations of China under grants (61275125), the Research Foundation for the Doctoral Program of Higher Education of Ministry of Education (20124408110003), the Province–Ministry Industry–University–Institute Cooperation Project of Guangdong Province under grant (2010B090400328), the Shenzhen Science and Technology Project, the Shenzhen Nanshan District Science and Technology Project, and the High-level Talents Project of Guangdong Province.
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Tan, Z., Li, X., Chen, Y. et al. Improving the Sensitivity of Fiber Surface Plasmon Resonance Sensor by Filling Liquid in a Hollow Core Photonic Crystal Fiber. Plasmonics 9, 167–173 (2014). https://doi.org/10.1007/s11468-013-9609-8
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DOI: https://doi.org/10.1007/s11468-013-9609-8