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MIM铝纳米阵列的双光子荧光及二次谐波的特性研究.docx

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MIM铝纳米阵列的双光子荧光及二次谐波的特性研究 Title:CharacterizationofTwo-PhotonFluorescenceandSecond-HarmonicGenerationinMIMAluminumNanoarrays Abstract: Thestudyinvestigatesthecharacteristicsoftwo-photonfluorescence(TPF)andsecond-harmonicgeneration(SHG)inmetal-insulator-metal(MIM)aluminumnanoarrays.TheuniqueopticalpropertiesexhibitedbyMIMnanostructuresmakethempromisingcandidatesforvariousapplicationsinnanophotonicsandnonlinearoptics.ThispaperexploresthefundamentalprinciplesgoverningTPFandSHGinMIMaluminumnanoarraysandprovidesinsightsontheexperimentaltechniquesemployedfortheircharacterization.TheresultsdemonstratethepotentialofMIMnanoarraysforenhancinglight-matterinteractionsandhighlighttheirpotentialinenablingfutureadvancementsinnonlinearopticaldevicesandbiomedicalimaging. Introduction: MIMnanoarrayshavegainedsignificantattentionduetotheirabilitytoconfineandmanipulatelightatthenanoscalelevel.Theiruniqueplasmonicpropertiesarisefromtheinteractionbetweenthemetalliclayers,whichleadstofieldenhancementandlocalizationeffects.ThispaperfocusesoninvestigatingtheTPFandSHGpropertiesofMIMaluminumnanoarrays. TheoreticalBackground: Two-photonexcitationisanonlinearopticalprocessthatenablesthesimultaneousabsorptionoftwophotonstoexcitefluorophoresatahigherenergylevel,resultinginfluorescenceemission.SHGisasecond-ordernonlinearopticalprocessthatoccurswhentwophotonscombinetogenerateaphotonwithtwicethefrequencyandhalfthewavelength.ThemathematicalmodelsgoverningTPFandSHGinMIMnanoarraysarediscussedindetail,highlightingtheroleofplasmonicresonanceanditsimpactonenhancingthenonlinearopticalprocesses. ExperimentalTechniques: AdetaileddescriptionoftheexperimentalsetupforcharacterizingTPFandSHGinMIMaluminumnanoarraysispresented.Keycomponentsincludeapulsedlasersource,amicroscopeobjective,andaspectrometerforspectralanalysis.ThefabricationprocessofMIMnanoarraysusinglithographyanddepositiontechniquesisalsooutlined. ResultsandDiscussion: TheobtainedresultsindicateasignificantenhancementinTPFandSHGsignalsinMIMaluminumnanoa