Ms. Xian Zhang Profile

Xian Zhang

at Fudan Univ

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Proceedings Article | 15 November 2018 Paper

One dimensional photonic crystal/metal structure hollow fiber refractive index sensor based on Tamm plasmon polariton

Xian Zhang, Xiao-Song Zhu, Yi-Wei Shi

Proceedings Volume 10964, 1096437 (2018) https://doi.org/10.1117/12.2505915

KEYWORDS: Sensors, Photonic crystals, Silver, Refractive index, Plasmons, Polaritons, Fiber optics sensors

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A high performance hollow fiber (HF) refractive index (RI) sensor utilizing Tamm plasmon polariton is proposed. The structure of the sensor is a HF with the one dimensional photonic crystal (1DPC)/metal multi-films coated on the inner surface of supporting tube. Theoretical analysis based on a ray transmission model is carried out to evaluate the performance of the designed sensor. Because the lights transmitted in the HF have much larger incident angles than those in the prism based sensors, the center wavelength of the 1DPC should shift to longer wavelength. The origin of multiple resonance dips in the transmission spectrum is investigated by calculating the electric field distribution in the 1DPC/metal structure. The variation of the RI detection range of the sensor with different bilayer period is also analyzed. The optimal bilayer period of the sensor for achieving the highest figure of merit (FOM) at different sensed RI is obtained. Compared to the convention HF surface plasmon resonance sensors which can only detect sensed medium with RI higher than that of the supporting tube material, the RI detection range of the proposed sensor is largely extended to 1.33-1.60 while the FOM is enhanced several times.

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