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Improving the Sensitivity of Fiber Surface Plasmon Resonance Sensor by Filling Liquid in a Hollow Core Photonic Crystal Fiber |
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| Authors: | Zhixin Tan Xuejin Li Yuzhi Chen Ping Fan |
| Institution: | 1. Shenzhen Key Laboratory of Sensor Technology, Nanhai Ave 3688, Shenzhen, 518060, People’s Republic of China 2. Shenzhen Engineering Laboratory for Optical Fiber Sensors and Networks, Shenzhen, 518060, People’s Republic of China 4. College of Physics Science and Technology, Shenzhen University, Shenzhen, 518060, People’s Republic of China 3. College of Electronic Science and Technology, Shenzhen University, Shenzhen, 518060, People’s Republic of China |
| 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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