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1、Vol.20No.2June2(X)3第20卷第2期2003年6月EXCERPTOFDISSERTATIONOpticaland]ectricalPropertiestfLo^DimensionalFerroelectricMaterialsandDevicePhysicsof3FerroelectricThinFilmWraredFocalPlaneArraysYUJianCHUJun2HaoTANGDing2Yuan(ShanghaiInstitute(fTechnicalPhysics,ChineseAcademycfSciences.Shanghai200
2、083.China)(Received4I>?cember2002)AbstractFirst,thegrainsizeeffectonferroelectricity,phasetransformation5latticedynamics,andpho2toluniinescencepropertiesofnanocrystallineBaliQ?werestudied・Second,theorientationmechanism,op：licalandelectricalpropertiesofliighlyorientedleadzirconatetitan
3、atethinfilmheteioslructurespreparedb)chemicalsolutionmethodswerestudied・Third,thefactorsdetenniningthepeifbrmaneeofrmnolithicferrcuelectricthinfilminfraredfocalplanearrayswereinvestigatedusinganndelingmethod.KeywordsnanociystallineBaTiOa,grainsizeeffect,phasetransfdnnation,orientedfen
4、oelectricthinfilmheteiostructures,distributedparameterrrodelofferroelectricfilminfraredmicrosensorCXC073Infrareddetectorshavenumerousapplicationsrangingfiomthennalimagingtosurveillance・CuiTenlly,detectorsaregenerallybasedonareversed2biasedjunctionconprisinganarrowbandgapsemiconductort
5、hatseparatesandde2tectsthephotogeneratedchargecreatedbyanabsorbedIRphoton.Forhighsensitivity,thesematerialsmustbemairiZtainedatlowtenperatures,andthusrefrigerationhardwareisneeded・Asanalternativeway,thosetemperatur^sen2sitivematerialsthatdonotrequirecoolingarebeingdevelopedforinfrared
6、detection,amongwhichfenoelectricmate2rialsarepromisingcandidatesassensitiveandcheaperthermaldetectors・Cbnparedwiththebulkcase,thepropertiesoffenoelectricthinfilmsdecreaseowingtothereductionofdimension.Inthiswork,thepiominentfactorssuchasgrainsize,ciystallogiaphicorientationontheoptica
7、landelectricalpropertiesoffenoelectricthinfilmswereinvesti2gated・Theperfonuancesaremainlyfocusedonthefollowing:nanocryslallinebariumtitanate(nc2BaTiO3),orientedleadzirconatetitanatethinfilmheteiostructuresandthemodelofmonolithicfenoelectricthinfilminfraredfocalplaneanay(IR2FPA).1BaTiO
8、3nano
