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ID:52428126
大小:997.00 KB
页数:18页
时间:2020-04-06
《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:femtosecondsynchronouslypumpedopticalparametricoscillatorExperimentalSetupforMeasuringBeamShiftSimulationTheoriesAnalysisfishnettwosubsetsdispersioncurveswithrigorouscoupled-waveanalysisPhaseadvance(deg)Frequency(THz)abPhaseadvance(deg)Frequ
5、ency(THz)TheoriesAnalysiscombinedstructuresdispersioncurvewithnegativeslopecPhaseadvance(deg)Frequency(THz)TheoriesAnalysisConclusionthefirst3DNIMatopticalfrequenciesthefishnetstructurealternatinglayersexperimentformeasuringprismbeamshifttheangleofrefractionConclusionnumericalcalcu
6、lationssimulationstheoriesanalysisApplicationsandFutureResearchDirectionapplicationsexplorealargevarietyofopticalphenomenascalingdownofphotonicsandimagingfutureresearchdirectiondecreasetheloss
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