The invention relates to a high performance photonic crystal sensor structure based on a multi hole defect coupled micro cavity directly. The invention removes the air holes at the middle of one side of the photonic crystal, leaving only seven in the center. A small air hole is arranged at the position of the six equilateral triangle centers of the central air hole and the six air holes around the center air hole, and the central air hole is removed to form a multi hole defect cavity. By introducing a plurality of small holes in the defect cavity, the invention increases the surface area of the defect cavity region to increase the quality factor Q and the sensitivity S of the defect cavity, and finally achieves the purpose of improving the performance of the photonic crystal sensor. Multi pinhole defect cavity quality factor Q of up to 71881, the sensitivity is 236nm/RIU, so the invention provides direct coupled photonic crystal micro cavity sensor performance parameters of FOM can be as high as 11238, compared with the other directly coupled micro cavity sensor is improved by two orders of magnitude, is a kind of High Performance Photonic Crystal structure of the sensor can be used for the field of bio sensor or gas sensor.
【技术实现步骤摘要】
一种基于多小孔缺陷直接耦合微腔的高性能光子晶体传感器结构
本专利技术涉及一种基于多小孔缺陷直接耦合微腔的高性能光子晶体传感器结构。
技术介绍
近年来,基于光子晶体器件如光子晶体波导(文献1:A.GoyalandS.Pal,“Designandsimulationofhighsensitivephotoniccrystalwaveguidesensor,”Optik,vol.126,pp.240–243,Jan.2015)、光子晶体微腔(文献2:P.Zhang,H.Tian,D.Yang,Q.Liu,J.Zhou,L.Huang,Y.Ji,“Radiusverticalgradednanoscaleinterlaced-coupledphotoniccrystalsensorsarray,”Opt.Commun.,vol.355,pp.331–336,May.2015)和光子晶体环形谐振腔(文献3:P.SharmaandP.Sharan,“Designofphotoniccrystalbasedringresonatorfordetectionofdifferentbloodconstituents,”Opt.Commun.,vol.348,pp.19–23,Aug.2015)等的传感器被广泛应用在生物传感(文献4:D.Wang,Y.Liu,L.Yuan,J.Lei,X.Li,G.Wu,S.Hou,“Anefficientopticalbiochemicalsensorbasedonapolyatomicphotoniccrystalringresonato ...
【技术保护点】
一种基于多小孔缺陷直接耦合微腔的高性能光子晶体传感器结构的实现方法,其特征在于:该光子晶体传感器是基于空气孔三角晶格二维光子晶体结构,即空气孔硅介质背景结构,其中硅的折射率为3.48;在光子晶体中引入一个多小孔结构的缺陷微腔并与W1波导直接耦合构成光子晶体传感器。
【技术特征摘要】
1.一种基于多小孔缺陷直接耦合微腔的高性能光子晶体传感器结构的实现方法,其特征在于:该光子晶体传感器是基于空气孔三角晶格二维光子晶体结构,即空气孔硅介质背景结构,其中硅的折射率为3.48;在光子晶体中引入一个多小孔结构的缺陷微腔并与W1波导直接耦合构成光子晶体传感器。2.根据权利1所述的实现方法,其特征在于光子晶体微腔的具体设计方法,即:将光子晶体中间一行两侧的空气孔移除只剩中间的七个,两侧形成W1波导,在最中心的空气孔与其周围六个空气孔构成的六个等边三角形中心的位置分别放置一个小空气孔,其半径远小于晶格常数,最后将最中心的空气孔移除,形成多小孔缺陷腔。3.根据权利要求1所述的一种光子晶体传感器,其特征在于:所述光子晶体结构包含的空气柱阵列大小为11×23,结构尺寸仅为5μm×...
【专利技术属性】
技术研发人员:田慧平,王春红,丁兆祥,付中原,孙富君,
申请(专利权)人:北京邮电大学,
类型:发明
国别省市:北京,11
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