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首页> 外文期刊>Optical fiber technology >Multilayered evanescent wave absorption based fluoride fiber sensor with 2D material and amorphous silicon layers for enhanced sensitivity and resolution in near infrared
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Multilayered evanescent wave absorption based fluoride fiber sensor with 2D material and amorphous silicon layers for enhanced sensitivity and resolution in near infrared

机译：具有2D材料和非晶硅层的多层蒸发波吸收的氟化物纤维传感器，用于提高近红外的灵敏度和分辨率

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摘要

Evanescent wave (EW) based fiber optic sensor is simulated and analyzed aiming at highly sensitive and precise detection of cancerous human liver tissues in near infrared (NIR). Various parameters such as combinations of fiber core (fluoride glass) and clad (fluoride and silica-based) materials, 2D materials (graphene and MoS2), absorptive amorphous silicon layer with different thicknesses, change of reference analyte, and variation in clad thickness are explored. Spectral interrogation method is utilized and the sensor's performance is evaluated in terms of sensitivity and resolution. The analysis indicates that for detection of malignant (HCC) liver tissue, the 5-layer sensor design, i.e., ZBLA fluoride glass core - 19.3% GeO2 doped silica clad (10 nm) - MoS2 monolayer (0.71 nm) - amorphous silicon layer (10 nm) - analyte (H2O as reference) leads to the maximum possible sensitivity of 234.2 mW/RIU (real index) and 1228.8 mW/RIU (imaginary index), and resolution of the order of 10(-10) RIU (real index) and 10(-11) RIU (imaginary index) at 0.954 mu m wavelength. The proposed sensor has the capability of providing significantly finer resolution than previously reported fiber sensors based on various techniques (such as SPR, LMR, etc.).
机译：模拟并分析了基于蒸发波（EW）的光学传感器，旨在对近红外（NIR）的癌症人肝组织的高敏感和精确检测。各种参数，例如纤维芯（氟化物玻璃）和包层（氟化物和二氧化硅）材料，2D材料（石墨烯和MOS2），具有不同厚度的吸收非晶硅层，参考分析物的变化和包层厚度的变化的各种参数探索。利用光谱询问方法，并且在灵敏度和分辨率方面评估传感器的性能。分析表明，用于检测恶性（HCC）肝组织，5层传感器设计，即ZBLA氟化物玻璃芯 - 19.3％GEO2掺杂二氧化硅（10nm） - MOS2单层（0.71nm） - 非晶硅层（ 10nm） - 分析物（作为参考H2O）导致234.2 mw / Riu（实值）和1228.8 mw / Riu（虚构指数）的最大可能敏感性，以及分辨率为10（-10）Riu（实际指数）和10（-11）Riu（虚构指数）在0.954 mu m m长度下。所提出的传感器的能力基于各种技术（例如SPR，LMR等）提供比先前报告的光纤传感器更精细的分辨率。

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