A lossy mode resonance (LMR)-supported fiber optic sensor in which a uniform fiber core is placed among two identical tapered regions, is investigated numerically. Indium tin oxide (ITO) and aluminum-doped zinc oxide (AZO) are considered as LMR active materials used to excite several lossy modes and gold and silver are used as surface plasmon resonance (SPR) active materials. In this probe design, a central uniform core coated with ITO/AZO is the active sensing region, whereas tapered regions are meant for bringing the incident angle close to the critical angle. The sensitivity of the present fiber optic bio-sensor is evaluated for first two LMRs utilizing both ITO and AZO separately, along with its variation with the taper ratio (TR). For ITO, the maximum sensitivity values are observed to be 18.425 μ m RIU −1 (refractive index unit) and 0.825 μ m RIU −1 , corresponding to the first and second LMRs, respectively, at a TR of 1.6 and for AZO, equiva...

中文翻译：

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基于损耗模式共振的均匀纤芯锥形光纤传感器，可提高灵敏度

数值研究了一种支持有损模式共振（LMR）的光纤传感器，其中在两个相同的锥形区域之间放置了均匀的纤芯。氧化铟锡（ITO）和掺杂铝的氧化锌（AZO）被视为用于激发几种有损模态的LMR活性材料，而金和银则被用作表面等离子体共振（SPR）活性材料。在这种探头设计中，覆盖有ITO / AZO的中央均匀芯是有源感应区域，而锥形区域用于使入射角接近临界角。分别利用ITO和AZO对前两个LMR评估了本光纤生物传感器的灵敏度，以及其随锥度比（TR）的变化。对于ITO，观察到的最大灵敏度值为18.425μmRIU -1（折射率单位）和0。