generation of switchable singular beams with dynamic metasurfaces ping yu参考-匠人.pdf

该【generation of switchable singular beams with dynamic metasurfaces ping yu参考-匠人 】是由【雪雁】上传分享，文档一共【23】页，该文档可以免费在线阅读，需要了解更多关于【generation of switchable singular beams with dynamic metasurfaces ping yu参考-匠人 】的内容，可以使用淘豆网的站内搜索功能，选择自己适合的文档，以下文字是截取该文章内的部分文字，如需要获得完整电子版，请下载此文档到您的设备，方便您编辑和打印。:..essprovidedbyUNIVAUTONOMADECOAHUILAUADECArticleGenerationofSwitchableSingularBeamswithDynamicMetasurfacesPingYu,JianxiongLi,XinLi,GiselaSchütz,MichaelHirscher,ShuangZhang,andNaLiuACSNano,eptedManuscript?DOI:?PublicationDate(Web):14May2019Downloadedfrom,2019epted“epted”manuscriptshavebeenpeer-,“epted”munitytoexpeditethedisseminationeptance.“epted”manuscriptsappearinpaniedbyanHTMLabstract.“epted”manuscriptshavebeenfullypeerreviewed,(DOI?).“epted”,the“epted”,itwillberemovedfromthe“epted”,“epted”.,Washington,?,,orworksmonwealthrealmCrowngovernmentinthecourseoftheirduties.:..Page1of22ACSNano1234567GenerationofSwitchableSingularBeams891011withDynamicMetasurfaces1213**********,?1,?211,3,PingYu,JianxiongLi,XinLi,GiselaSchütz,MichaelHirscher*,ShuangZhang*,1920andNaLiu1,4*212223241MaxPlanckInstituteforIntelligentSystems,Heisenbergstrasse3,70569Stuttgart,Germany2526272BeijingEngineeringResearchCenterforMixedRealityandAdvancedDisplay,Schoolof282930Optoelectronics,BeijingInstituteofTechnology,SouthZhongguancunStreet5,1000813132Beijing,China3334353SchoolofPhysics&Astronomy,UniversityofBirmingham,BirminghamB152TT,,UniversityofHeidelberg,ImNeuenheimerFeld227,691204041Heidelberg,:..ACSNanoPage2of22123ABSTRACT:,,,,wedemonstratea2526twocascadedmetasurfaceschemeforholographicpatternswitching,takinginspirationfrom272829orbitalangularmomentum--securityopticalelementsforanti-:metasurfaces,dynamicfunctionalities,vectorbeams,vortexbeams,optical36munications38394041424344454647484950515253545556575859602ACSParagonPlusEnvironment:..Page3of22ACSNano123Vectorandvortexbeamsaretheformsofsingularbeamsbasedonspatialdistributionsof456polarizationandphase,,which78ischaracterizedbyaspace-,whichischaracterizedbyahelicalphase-front,carryingan1112orbitalangularmomentum(OAM).Singularbeamsempowerabroadrangeofapplicationsin1314particletrappingandmanipulation,1high--7Opticalfibers,8q-plates,9andspatiallight1819modulators10,,,efficient,--atoms,anoantennas,canlocally343512,13controllightpropertiessuchasphase,amplitude,,whichleadtoaplethoraofoptical3940functionalitiesincludinglightfocusingandsteering,14holography,15,16imaging,17-19vector4142andvortexbeamgenerations,20-,researchendeavorshavebeen434445mainlydevotedtostaticmetasurfacedevices,inwhichthepropertiesofindividualpixels4647cannotbereconfiguredinrealtime,,themetasurfacesthemselvesareintrinsicallystatic,-,:..ACSNanoPage4of22123pixelsisenabledbyutilizationofmagnesium(Mg)nanorods,whichpossessplasmonic4528,-78transitionfrommetaltodielectricuponH2loading,formingmagnesiumhydride(MgH2)..pactand2324multi-:272829Westartwiththedesignofaplasmonicmetasurface,whichcangeneratetwoanomalously3031reflectedvortexbeamswithoppositetopologicalchargesofland–l,respectively,atnormal3233incidenceofcircularlypolarized(CP)-3435handedcircularlypolarized(RCP)light,thetworeflectedvortexbeams(off-axisangle=25°)363738withthesamepolarizationcanbewrittenasfollows:3940112exp[i(lθ+φ1)][](1)41-i42431144exp[i(-lθ+φ2)][](2)2-i454647,,-handedcircularly[]-i51521553polarized(LCP)light,thephaseprofilesflipinthespatialdomain,formingtwovortex5455beamsasfollows:565711exp[i(-lθ+φ2)][](3)582i59604ACSParagonPlusEnvironment:..Page5of22ACSNano123114exp[i(lθ+φ1)][](4)2i567Forlinearlypolarized(LP)light,whichcontainsRCPandLCPlightwithequalintensity,89thereflectedlightisavectorbeam,resultingfromthesuperpositionoftwovortexbeamsof1011oppositetopologicalcharges(seeSupportingInformation).121314Thevaluesofandcontrolthepolarizationdistributionsofthegeneratedvector??1??,if,thereflectedlightononeside(Eq.(1)+Eq.(3))canbeφ1=φ21718cos(lθ)19writtenasexp(iφ2)[],(lθ)202122hand,if,thereflectedlight(Eq.(1)+Eq.(3))canbewrittenasφ1=φ2+πexp[i(φ2+π/2)]2324-sin(lθ)25[()],,vectorbeamscoslθ262728ofdifferentpolarizationstates(radialorazimuthalpolarization),,azimuthallyandradially3637polarizedvectorbeamsofl=1aredesignedasinitialandfinalstates,:onegold(Au)×804748nm×(.,Mg(I)).Beforehydrogenation,(.,Mg(II)),whichisgeometricallyengineeredtoobtainthe565758acquiredPancharatnam-Berry(PB)eneratinganazimuthallypolarized59605ACSParagonPlusEnvironment:..ACSNanoPage6of22123vectorbeamofl=1(seeFigure1b).Afterhydrogenation,,whichisengineeredtogeneratearadiallypolarizedvectorbeamofl=1(see910Figure1b).Asaresult,switchablevectorbeamsofdifferentpolarizationstatescanbereadily1112achievedthroughhydrogenation/(SEM),themetasurfaceplacedinagascellisilluminatedbyLPlightat633nm2324(seetheopticalsetupinFigureS1).(upperrow),theintensityprofile(firstcolumn),the3031polarizedintensitiesarepetal-shaped,indicatingthegenerationofanazimuthallypolarized3233vectorbeamofl=-=,°to180°°(.,434445eight-phaselevels)=1,2,and3canbefoundinMovieS1-%,andthehydrogenation/:..Page7of22ACSNano123Todemonstratetheversatilityofourapproach,,theMgnanorod(.,Mg(II))and78theAunanorodaregeometricallyengineeredonthemetasurfacetogenerateradially910polarizedvectorbeamsofl=2andl=1,,(seetheopticalsetupinFigureS2).Vortexbeamswitchingbetweentopological2526chargesofl=1and2aswellasl=1and3uponH2andO2loadingaredemonstratedin272829Figures3aandb,,,theycouldbeusedascarriersofdifferent3435informationchannelsformultiplexingandtransmittingmultipledatastreams,which3637potentiallyincreasethecapacityoff