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1、苏州大学ppt模板BackgroundOpticalwaveYadongXu.Scientificreports,2015AcousticwaveYangboXie.Nat.com.,2014StructureandPrincipleSimulationandAnalysisSimulationandAnalysisSimulationandAnalysisSimulationandAnalysisSimulationandAnalysisConclusionandProspectInconclusion,wehavedemonstratedthatmetallicgra
2、tingstructurewithgradientindexmaterialscouldbeusedtoobtainnearlytotalomnidirectionalreflection,regardlessofthepolarizationsofincidentwaveandtheimpedancepropertiesofthefilledmaterials.ThisworkhasbeenpublishedinEurophys.Lett.,114(3),34003(2016).Thankyouforyourattention!relevantparameterwhyd
3、oesthereexistcertaintransmissionfortheTMincidence?Infact,thematerialprofileisaccuratelyobtainedforthematched-impedanceGIMsbymodulatingphaseprofileinsideslits.Whileforthecaseofmismatched-impedanceGIMs,duetothescatteringarisingfrommismatchedimpedancebetweenairandsilts,atinydeviationofphasep
4、rofilecouldemerge.Asaresult,foranincidentwave,thedestructiveinterferencesofthetransmittedwavesarenotperfect,sothatsomeoutgoingwavecouplestothepropagationordern=1,givingrisetoalittletransmissionintheoutgoingspace.Itispossiblethathigherorderofwaveguidemodesappear?Inourwork,thewidthofeachsli
5、tis3/64andthemaximalrefractiveindexofthefillingmaterialsis3.625.Therefore,thehighestordermodesexistsinourwaveguideslitis,whichmeansthatonlythefundamentalwaveguidemodecansurviveintheslits.Toconstructawholemetallicgratingring,thesupercellsarebentintoasectorring,sothattherectangularshapedsli
6、tswillchangeintosectors.Forreducingthedeviationcausedbybendingthegratingstructure,ametallicgratingringwithasmallercurvaturearerequired.Withcombiningtheenablementofconstructingthegratingringandthereflectioneffectforthegratingring,inourdesign,thewholemetallicgratingringincludes18sectors.Whe
7、ntheflatmetasurfaceisbentintoametacage,therectangularshapedslitwillchangeintosectors.Wouldthischangeaffecttheresults?此课件下载可自行编辑修改,仅供参考!感谢您的支持,我们努力做得更好!谢谢