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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：具有二维材料和非晶硅层的多层基于van逝波吸收的氟化物纤维传感器，可增强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：对基于逝波（EW）的光纤传感器进行了仿真和分析，目的是在近红外（NIR）中高度灵敏，精确地检测人类肝癌组织。各种参数包括纤维芯（氟化物玻璃）和包层（氟化物和二氧化硅基）材料，二维材料（石墨烯和MoS2），具有不同厚度的吸收性非晶硅层，参考分析物的变化以及包层厚度的变化等。探索。利用光谱询问方法，并根据灵敏度和分辨率评估传感器的性能。分析表明，要检测恶性（HCC）肝组织，需要采用5层传感器设计，即ZBLA氟化物玻璃芯-19.3％的GeO2掺杂的二氧化硅覆层（10 nm）-MoS2单层（0.71 nm）-非晶硅层（ 10 nm）-分析物（以H2O为参考）导致最大可能的灵敏度为234.2 mW / RIU（真实指数）和1228.8 mW / RIU（虚像指数），分辨率为10（-10）RIU（真实指数） ）和波长为0.954微米的10（-11）RIU（虚像指数）。与以前报告的基于各种技术（例如SPR，LMR等）的光纤传感器相比，提出的传感器具有提供更高分辨率的能力。

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