4. Super-Resolution and Near-Field Enhancement ...

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1、FilippoCapolino/ApplicationsofMetamaterials_CFinalsPage--#4Super-ResolutionandNear-FieldEnhancementwithLayersofResonantArraysofNanoparticlesSergiySteshenkoUniversityofSiena.Introduction.........................................-FilippoCapolino.Near-FieldEnhancement...

2、..........................-UniversityofCalifornia,Irvine.ModesintheArraysofNanoparticles................-.Super-Resolution.....................................-SergeiA.Tretyakov.EvanescentFieldTransportation.....................-HelsinkiUniversityofTechnology.NanoparticlesC

3、hoices...............................-ConstantinR.Simovski.Conclusions..........................................-HelsinkiUniversityofTechnologyReferences.................................................-Whenamultilayerarrayofplasmonicnanospheresisplacednearanelectricdipole,ontheo

4、therside,theopticalnear-fieldisenhancedduetotheexcitationofresonantmodesinthelayers.Forsomeparticularfrequencies,thefieldbehindthearrayisconcentratedinasubwavelengthregion,creatingwhathasbeendenotedassuper-resolutioneffect.Aninvestigationofthisphenomenonisherecarriedoutbyusingthesingledipo

5、leapproximationofthenanoparticles.Weclearlyshowtherelationshipbetweennear-fieldenhancement,super-resolution,andmodaldispersioncharacteristics.Weexplorethemechanismoffieldtransportationandresolutionontheothersideofthelayeredmaterial.Thelayers’resonancesareabletoreproduce(transport)partofthe

6、evanescentspectrumtotheothersideoftheselayers,whichotherwisewoulddecayrapidly.4.1IntroductionRecently,anewdesignofthesuper-resolutionimagingdevicesintheopticalfrequencyrangewassuggested[,].Itisbasedonthepossibilitytoenhanceevanescentfieldsandformsubwavelengthimages,moreproperly,asubwavel

7、engthfieldconcentration,withtheuseoftworesonantparallelarraysofsmallparticlessuchasplasmonicnanospheres.Thissuperlensingapproachisanattemptofapossiblephysicaldesignnotbasedonthetraditionaluseabulkdouble-negativemetamaterialslab[],whichfabricationatopticalfreq