Appl Opt. 2021 Jan 10;60(2):358-366. doi: 10.1364/AO.412951.
An optical fiber having the properties of photonic crystal and offering new diversity and features beyond a conventional optical fiber is the photonic crystal fiber (PCF). In this paper, a simplified version of a highly sensitive plasmonic sensor, called a "slotted PCF based plasmonic biosensor," is studied numerically with asymmetric air holes using the finite element method. From numerical records through the interrogation method, the maximum obtained wavelength sensitivity and amplitude sensitivity are 22000 nm/RIU and 1782.56, respectively, with a maximum wavelength resolution of 4.54×10 RIU for the -polarized mode. Finally, optimization of the sensor performance is scrutinized, and the effect of different parameters is studied with proper resonance wavelength curve fitting. The design structure of the fiber is simple, symmetrical, easy to fabricate, and cost effective and has higher sensitivity than other PCF based sensors. Having a symmetric orientation of air holes, classic geometric structure, and higher sensitivity, it has the capability to be used in sensing applications, refractive index detection, and identification of biochemicals, biomolecules, and other analytes.
一种具有光子晶体特性的光纤，提供了超越传统光纤的新多样性和功能，这种光纤被称为光子晶体光纤（PCF）。在本文中，使用有限元法对一种称为“基于开槽 PCF 的等离子体生物传感器”的高度灵敏等离子体传感器的简化版本进行了数值研究，该传感器采用了不对称空气孔。通过询问方法获得的数值记录表明，对于 - 偏振模式，最大获得的波长灵敏度和幅度灵敏度分别为 22000nm/RIU 和 1782.56，最大波长分辨率为 4.54×10 RIU。最后，对传感器性能进行了优化，并通过适当的共振波长曲线拟合研究了不同参数的影响。光纤的设计结构简单、对称、易于制造且具有成本效益，并且比其他基于 PCF 的传感器具有更高的灵敏度。它具有对称的空气孔取向、经典的几何结构和更高的灵敏度，因此具有在传感应用、折射率检测以及生物化学、生物分子和其他分析物的识别中使用的能力。
