资源描述：
《（四）Near-Field Imaging of Surface Plasmon Polaritons Excited by Chains of Gold Nanodiscs》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、PlasmonicsDOI10.1007/s11468-013-9566-2Near-FieldImagingofSurfacePlasmonPolaritonsExcitedbyChainsofGoldNanodiscsL.Billot&M.Mortier&L.AigouyReceived:7March2013/Accepted:11April2013#SpringerScience+BusinessMediaNewYork2013AbstractWepresentastudyofthenear-fieldpatterncreated[
2、1,2]andvariousintegratedopticaldevices[3,4].AsimplebychainsofgoldnanodiscssituatedonagoldthinfilmandwaytocreateSPPsistheKretschmannconfiguration[1,5,6].illuminatedatobliqueincidence.EachdiscgeneratessurfaceInthatgeometry,themetalfilmisdepositedonatransparentplasmonpolarit
3、onsthatpropagateonthegoldsurface.Thesubstrateandexcitedthroughthismaterialatanangleforcreatedwavesinterferebetweenthemandwiththeilluminat-whichtheprojectionoftheincidentwavevectoronthesurfaceingbeam.WeobservedthatwhenthediscsareseparatedbyamatchestheSPPwavevector.Thiswayt
4、ogenerateSPPsisnotdistancesmallerthanthehalfwavelength,thechainbehaveslocalandnecessitatesacarefulalignmentoftheincidentbeam.likeacontinuousridge.Whenthediscsseparationincreases,aItisalsopossibletoexciteSPPsbyusingsub-wavelength-complexperiodicpatternappearsandextendsupto
5、severalsizedsurfacedefects,protrusions,orlithographically-madewavelengthsfromthechain.Forsomespecificseparationfeatures.Inthatcase,theincidentbeamisdiffractedbythedistances,adirectionalemissionofsurfaceplasmonisalsostructuresandpartofthelightisconvertedintoSPPs[6].Theobse
6、rved.TheexperimentalresultsareingoodagreementgenerationofSPPs,theirpropagation,andtheirinteractionwithnumericalsimulationsperformedbyconsideringeachwiththelocalenvironmenthavebeenobservedexperimentallydiskasanindependentdipole-likesurfaceplasmonsource.andstudiedtheoretica
7、llyinthecaseofmanykindsofnano-structures:isolatedholes[7–9],slits[10–12],particlesandKeywordsPlasmon.Nanoparticle.Near-field.ridges[13–15],andseveralassociationsofthesestructuresFluorescence.Microscopy[16–23].WhenseveralSPPsarecreatedbydistinctnanostruc-tures,theirinterac
8、tioncanresultinlight-focusingeffects[16,17,22],generationofdirectivebeams[15,22],orperiodicIntro
