缺陷结构对一维光子晶体带隙拓展研究.pdfVIP

缺陷结构对一维光子晶体带隙拓展的研究 徐 清1吉亚萍1黄鹏2黄美东1 1天津师范大学物理与电子信息学院，天津3003872中国石油吐哈 油田公司甲醇厂甲醇车间，新疆吐鲁番839009 摘要：将周期结构与缺陷结构组合成“异质结构”，利用周期结构的光子带隙弥补缺陷模态，可获得宽带隙。通 过结构优化，在保持光子带隙性能几乎不受影响的情况下，可大大减少叠加结构的总层数，这对于简化生产工 艺、节约制备成本具有很大的现实意义。本文以SiO2和TiO2薄膜为组分，制备异质结构光子晶体样品并测试 了其光学性能，对带隙拓宽及结构优化的理论计算结果进行了实验验证。 关键词：一维光子晶体；缺陷结构；异质结构;带隙拓展 Broadeningthebandgapofone-dimensionalphotoniccrystals bydefect-containingstructures XUQing1 JIYaping1 HUANGPeng2HUANGMeidong1 1CollegeofPhysicsandElectronicInformationScience,TianjinNormalUniversity, Tianjin300387,China;2MethanolWorkshop,MethanolFactory, TuhaOilField,ChinaPetroleumLtd.,Tulufan839009,China Abstract:Hetero-struetures,periodicmultilayerssuperimposedbydefect-containingstructures,areusedtoget broadenedbandgapsofone-dimensionalphotoniccrystals,becausethedefectmodesmaybecompensatedbythe eigenbandgapoftheperiodic.Thenumberoftotallayersofthehetero-structurescanbelargelyreducedthroughop timization,whilethebandgapsarekeptunchanged.Theseresultsaresignificantsincethefabricationprocesscanbe simplifiedandthecostreduced.Inthiswork,TiO2andSiO2thinfilmsaretakentoformone-dimensionalphotonic crystalsinformsofperiodicstructures,structureswithdefectlayersaswellastheirheterostructures.Theiroptical propertiesandphotonicbandstructuresaremeasuredtoverifythebroadeningeffectsofbandgaps. Keywords:one-dimensionalphotoniccrystal;defects;heterostructures;band-gapbroadening 电，发现在2 ，而且原带8 巨八舸尤蹄 ．为了便j 目中 （虚射 [4] Fink,Winn] tionalreflecto 1679-1682