简介：PECVD在玻璃底层上准备的非结晶的硅电影被退火的常规炉子并且快速的热退火(RTA)分别地使结晶。夫罗姆塞·拉曼系列，X光检查衍射和扫描电子显微镜，谷物尺寸在两种技术在850℃被使结晶，这被发现。RTA做的薄膜是光滑的并且完成式组织，薄膜由FA退火了有高度结构的混乱。大约30nm的一种平均谷物尺寸被两种技术获得。

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简介：ThemorphoussiliconfilmspreparedbyPECVDatsubstratetemperaturesof30℃havebeencrystallizedbyrapidthermalannealingmethod,thebudgetoftime-temperatureintheannealingprocessis600℃for120s,850℃for120s,and950℃for120s.Theresultsindicatethecrystallizationat850℃and950℃arebetterasshowninmicro-Ramanscatteringandscanningelectronicmicroscope.

简介：Magnesiumoxide(MgO)nanowiresweresynthesizedonthegold-coatedSi(100)andMgO(100)substratesatlowertemperature(600℃)bypulsedliquidinjectionmetalorganicchemicalvapordeposition(MOCVD).Thegoldcatalystcouldbefoundonthetipsofnanowires,whichpresentsthevapor-liquid-solid(VLS)growthmechanism.Reactivespecies(oxygenormagnesium)havestrongeffectsonthegrowthofnanowires.Abundantreactivespecieskilltheverticallyalignednanowirestoberandomlyalignedonesorevenchangetheverticalgrowthmodetothehorizontalgrowthmodewithsurface-parallelnanowires.Usually,nanowireswithlargeraspectratio(>10,aspectratio=length/diameter),higherdensity(>500/μm2)andsmallerdiameter(≤20nm)canbeeasilysynthesizedwithlongerinjectionperiod(≥2s),smallerinjectionmass/period(≤4.6mg)andsuitableoxygenpartialpressure(2.4Torr).

简介：Theconfinementlossandbendlosspropertiesofall-solidphotonicbandgapfiberswithanarrayofringsdopedwithhighindexmaterialareinvestigated.Thecalculatedresultsshowthatforaspecificstructure,theconfinementlossandthecriticalbendradiusarereducedsimultaneouslyinsomebandgapsbyincreasingtheinnerdiameterofring,whichprovidesausefulguideandatheoreticalbasisfordesigninglargemodeareafiberswithlowloss.