Numerical analysis of a photonic crystal fiber based on two polarized modes for biosensing applications  

作　　者：秦伟 李曙光 薛建荣 辛旭军 张磊 

机构地区：[1]Key Laboratory of Metastable Materials Science and Technology,College of Science,Yanshan University

出　　处：《Chinese Physics B》2013年第7期251-256,共6页中国物理B（英文版）

基　　金：the National Natural Science Foundation of China(Grant Nos.61178026 and 60978028);the Specialized Research Fund for the Doctoral Program of Higher Education of China(Grant No.20091333110010);the Natural Science Foundation of Hebei Province,China(Grant No.E2012203035)

摘　　要：This paper presents a theoretical study on a photonic crystal fiber plasmonic refractive index biosensor. The proposed photonic crystal fiber sensor introduces the concept of simultaneous detection with the linearly polarized and radially polarized modes because the sensing performance of the sensor based on both modes is relatively high, which will be useful for selecting the modes to make the detection accurately. The sharp single resonant peaks of the linearly polarized mode and radially polarized mode, are stronger and more sensitive to the variation of analyte refractive index than that of any other polarized mode in this kind of photonic crystal fiber. For linearly polarized mode and radially polarized mode, the maximum sensitivities of 10448.5nm per refractive index unit and 8230.7nm per refractive index unit can be obtained, as well as 949.8 and 791.4 for figure of merits in the sensing range of 1.33-1.45, respectively. Compared with the conventional Au-metalized surface plasmon resonance sensors, our device is better and can be applied as a biosensor.This paper presents a theoretical study on a photonic crystal fiber plasmonic refractive index biosensor. The proposed photonic crystal fiber sensor introduces the concept of simultaneous detection with the linearly polarized and radially polarized modes because the sensing performance of the sensor based on both modes is relatively high, which will be useful for selecting the modes to make the detection accurately. The sharp single resonant peaks of the linearly polarized mode and radially polarized mode, are stronger and more sensitive to the variation of analyte refractive index than that of any other polarized mode in this kind of photonic crystal fiber. For linearly polarized mode and radially polarized mode, the maximum sensitivities of 10448.5nm per refractive index unit and 8230.7nm per refractive index unit can be obtained, as well as 949.8 and 791.4 for figure of merits in the sensing range of 1.33-1.45, respectively. Compared with the conventional Au-metalized surface plasmon resonance sensors, our device is better and can be applied as a biosensor.

关 键 词：photonic crystal fiber SENSORS surface plasmon 

分 类 号：TN253[电子电信—物理电子学] TP212.3[自动化与计算机技术—检测技术与自动化装置]