一种缺陷态光子晶体的气敏传感理论研究  

Vapor Sensing Theoretical Study on a Defective Photon Crystal

作　　者：张乐欣[1] 张冉[2] 李志全[1] 

机构地区：[1]燕山大学材料科学与工程学院亚稳材料制备技术与科学国家重点实验室,河北秦皇岛066004 [2]燕山大学仪器科学与工程系,河北秦皇岛066004

出　　处：《传感技术学报》2007年第7期1475-1478,共4页Chinese Journal of Sensors and Actuators

摘　　要：利用Bruggeman介电常数近似理论,毛细冷凝作用以及一维光子晶体传输矩阵的理论分析方法,对多孔硅微腔被一定浓度的有机物蒸汽吸附时的传感特性进行了深入地研究,建立了其光学传感模型,并用计算机数值模拟的方法对多孔硅微腔的传感模型进行了理论仿真,得出了饱和情况下有机物蒸汽折射率与峰位漂移量间的线性关系以及乙醇蒸汽浓度与微腔反射谱透射峰峰位漂移量间的函数关系曲线,为多孔硅微腔传感元件的设计和应用提供了理论基础.In our work, we set up the optical sensing model by applying Bruggeman effective medium approximation theory and capillary condensation process and transfer matrix theoretically analytical method of one-dimensional photonic crystals. At the same time, we have comprehensively research on the sensing characteristics when PSMs were exposed to given concentration organic vapors. At last, we make theoretical simulation for sensing model of the PSMs in case of saturation by using computer numerical calculating, finding the linearity relation between refractive index of organic solvent and the peak shift. At the same time the peaks shifts as a function of the concentration of ethanol vapors were deduced. Our results will provide theoretical basis for the application of the PSMs optical sensing components.

关 键 词：蒸汽传感 多孔硅微腔 Bruggeman介电常数近似 传输矩阵 数值模拟 

分 类 号：TN304.52[电子电信—物理电子学]