金属纳米薄膜对大孔径光子晶体光纤传感特性的影响  

Effects of Metallic Nanofilms on the Properties of PCF Sensor with Large Size Microfluidic Channels

作　　者：邴丕彬[1] 邸志刚[2,3] 李忠洋[1] 姚建铨[3] 陆颖[3] 

机构地区：[1]华北水利水电大学电力学院,郑州450011 [2]河北联合大学电气工程学院,唐山063009 [3]天津大学精密仪器与光电子工程学院激光与光电子研究院,光电信息技术科学教育部重点实验室,天津300072

出　　处：《人工晶体学报》2014年第5期1291-1295,共5页Journal of Synthetic Crystals

基　　金：河南省教育厅科学技术研究重点项目(13A510721)

摘　　要：基于全矢量有限元法研究了金属纳米薄膜对大孔径光子晶体光纤(PCF)传感特性的影响。针对所设计的大孔径PCF传感模型,数值模拟了PCF材料中金属纳米薄膜厚度不同以及不均匀时所表现的吸收特性:当金属纳米薄膜的厚度为均匀的30 nm和40 nm时,分别在0.535μm和0.565μm处出现非常明显的吸收峰,且HEx11和HEy11两个模式完美简并;当有一个空气孔中的金属纳米薄膜厚度为30 nm,其他空气孔中的金属纳米薄膜厚度为40 nm时,HEx11和HEy11模式的损耗曲线明显不简并,能够表现出两种金属纳米薄膜厚度的吸收特性;模拟计算了所设计传感器不同测量方法所表达的灵敏度与分辨率。研究结果为PCF传感器中金属纳米镀膜的实际操作和使用提供了理论依据。The effects of metallic nanofilms on sensing characteristics properties of photonic crystal fiber （PCF） sensor with large size microfluidic channels were studied by the full-vector finite element method （FEM）. Aimed at large size microfluidic channels PCF sensing model, the absorption characteristics of the metallic nanofilms with different thickness and nonuniform has been numerical simulated. The two obvious absorption peaks appeared at 0. 535μm and 0. 565μm when the thickness of the metal nanofilm was uniform 30 nm or 40 nm, the HE11^x and HE11^y modes of the PCF were perfect degenerated. However, if the thickness of the metallic nanofilm in only one air hole which was 30 nm, and the others were 40nm, and the two modes were not degenerated obviously. So the absorption characteristics of two metallic nanofilm thicknesses were expressed. The sensitivity and resolution of the designed sensor was simulated by different measuring methods. The results provide a theoretical basis for the PCF sensor metal nanocoating operation and application.

关 键 词：金属纳米薄膜 光子晶体光纤 传感特性 有限元法 

分 类 号：TN253[电子电信—物理电子学]