具有负折射率的三维超材料.ppt

《具有负折射率的三维超材料.ppt》由会员上传分享，免费在线阅读，更多相关内容在PPT专区-天天文库。

1、Three-dimensionalOpticalMetamaterialwithaNegativeRefractiveIndexJasonValentine,ShuangZhang,ThomasZentgraf,ErickUlin-Avila,DentchoA.Genov,GuyBartal&XiangZhangUniversityofCalifornia,BerkeleyPresentedby***Metamaterialsartificiallyengineeredstructurespropertiesnotattainablewithnaturall

2、yoccurringmaterialsNegativeRefractiveIndexDNAobjectDNAimageSuperlensNegativeRefractiveIndexrelativepermittivityrelativepermeabilitynotfoundinanynaturallyoccurringmaterialNegativeRefractiveIndexSnell'slawn1>n2>0ConventionalMaterialMetamaterialn1n2n3n3<0Snell'slawstillappliesthesa

3、mesideofthenormalPreviousWorknegative–indexmetamaterialsNIMsfirstdescribedmorethan40yearsagobedemonstratedformicrowavefrequenciesOurWorkNIMs3Dopticalfrequenciesrefractiveindexmeasured3DOpticalNIM:FishnetStructurea,p=860nm,a=565nm,b=265nmb,sideetchedExperimentalSetupforMeasuringpris

4、mobservingtherefractionanglelightsource:femtosecondsynchronouslypumpedopticalparametricoscillatorExperimentalSetupforMeasuringBeamShiftSimulationTheoriesAnalysisfishnettwosubsetsdispersioncurveswithrigorouscoupled-waveanalysisPhaseadvance(deg)Frequency(THz)abPhaseadvance(deg)Frequ

5、ency(THz)TheoriesAnalysiscombinedstructuresdispersioncurvewithnegativeslopecPhaseadvance(deg)Frequency(THz)TheoriesAnalysisConclusionthefirst3DNIMatopticalfrequenciesthefishnetstructurealternatinglayersexperimentformeasuringprismbeamshifttheangleofrefractionConclusionnumericalcalcu

6、lationssimulationstheoriesanalysisApplicationsandFutureResearchDirectionapplicationsexplorealargevarietyofopticalphenomenascalingdownofphotonicsandimagingfutureresearchdirectiondecreasetheloss