简介：Aseriesofthehybridtetranueleareubanelikeelustereompoundshavebeeninvestigatedsystematieally.Studyofthesenewtypeeomplexeshavebeenattraetedmuehattentionbyehernistsreeently,beeauseoftheirstrueturaleharaeterizatiox飞andspeeifie

简介：Specularandstrongreflectionsarethemainproblemsencounteredduringpartimagedefectinspectionofshinyorhighlyreflectivesurfaces.Inthisletter,weproposeanimprovedilluminationmethodfordefectinspection.Adiffuselightsourceisdesignedbasedonthephysicsanalysisoflightreflection.Thedistributionofintensityissimulatedaccordingtoaknownmodeltoverifytheilluminationuniformityofthesource.Experimentsshowthatdefectexpressivitywhenusingtheproposedilluminationmethodhasabetterperformance.Theopticalmodelisnotonlysuitableforthedefectdetectionofmetalballsbutalsoforthedefectdetectionofplanesandcylinders.

简介：WedesignaD-shapedfiberopticbiosensorbasedonthesurfaceplasmonresonance(SPR)ofametal-graphenelayerandsimulatethisSPRusingthefiniteelementmethod.Usingametal-graphenelayerasthesensingmaterial,surfaceplasmaresonanceissimulatedastherefractiveindexoftheexternalenvironmentrangesfrom1.33to1.36.Simulationresultsshowthatametal-graphenelayerattachedtotheD-shapedopticalfibercorecancouplewithlightunderaspecificpolarizationstateandexcitestrongplasmaoscillationsonthelayersurface.Calculatedtransmissioncoefficientsshowthattheresonancewavelengthobviouslymovestowardlongerwavelengthsastherefractiveindexofthetestmediumincreases,andasensitivityof5400nm/RIUisobtained.Becauseofitslargesurfacevolumeratioandgoodbiocompatibility,graphenemaybeutilizedinmanyapplicationsinthefieldofbiosensing.

简介：Er3+-dopedheavymetalborosilicateglasseswerepreparedusingconventionalmeltingandquenchingmethod.Theemissionspectraof4Ⅰ13/2→4Ⅰ15/2transitionwereobserveduponexcitationat974nmandthelifetimeof4Ⅰ13/2levelofEr3+wasmeasured.Basedonthesedata,thefluorescencepropertiesofEr3+areinvestigatedontheemissionandgaincharacteristicsatthe1.5μmbands.Inparticular,theeffectofrelativeheavymetalcontentonfluorescencepropertiesisdiscussed.

简介：AseriesofAlx-(Alq3)1-xgranularfilmsispreparedonSiwaferwithnativeoxidelayerusingco-evaporationtechnique.Largelateralphotovoltaiceffect(LPE)isobserved,withanoptimalLPVsensitivityof75mV/mminx=0.35sample.ThedependenceofLPEontemperatureandAlcompositionisinvestigated,andthepossiblemechanismisdiscussed.