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1、ModelingThinNanoantennasforWaveFrontEngineeringBasedonRWGMomentMethodIntroductionInrecentlyyears,Nanoantennahaveundergoneunprecedenteddevelopment.Thistechnologycanrealizenanofocus,near-fieldenhancement,phasediscontinuedandsoon.Beforefabrication,Nanoantennashouldbesimulatedfor
2、confirmationofdesign.However,commonalgorithmsincludeFDTD(finitediscretetime),FET()alwaystakealotofmemoriesandtime,whichincreasethedifficultofantennasdesign.MOM(momentofmethod)forfar-fieldproblemsinRFhasbeenamaturetechnology.So,thismethodwillbeappliedtowaveengineeringofnanoant
3、ennasarraysinthispaper.ln[1],comparisonofelectricfieldvaluesbetweenFDTDandMOMconfirmeditsfeasibility.However,tothebestofourknowledge,thereisnoreportontheasymmetrictransmissionforlinearlypolarizedEMradiationonly.In[],GeneralSnellLawhasbeenprovenbythegenerationofanomalousrefrac
4、tionandreflectionwhenlightispropagatedthroughaspecialplasmonicplanner.Anextremelythinlayerwithphaseshiftbasedonnanoantennashasenabledustomodifytheopticalwavefronttoachievesubdiffractionfocusing[].aunidirectionalradiationpatternoverawidespectrumfromthehoneycombarrayofplasmonic
5、nanoantennashasenhancedsolarenergyconversionefficiencyin[].Meanwhile,Nanoantennaalsohavebeenusedinbiologicalimage,photodetection,opticaldatastorage,heattheatrical,fluorescenceexcitation,SurfaceenhancedRamanscattering,coatingandsoon.[]hasgivenanacceptableagreementbetweenFDTDan
6、dMOMwithoutRWGthroughV-shapedantennas.Morethan,[]hasgeneralizedtheagreementthroughthecomparisonofintensityofdifferentshapedantennasfromnear-fieldtofar-fieldbetweentwodifferentalgorithms.Inthisstudy,C-shapedantennasaremoldedforrefractionandfocusbyFDTDandMOM,thencomparisonofsom
7、eparametersareperformed.Figure1AntennaDesignC一shapedantennawithrotationof()showninFig.2(a)isconsidertobeunitcellforphasevariationinthewholerangefrom0to2丌oWechosewavelengthA=600nm,soa=271nm,b=163nm，c=54nm.theantennamaterialisperfectelectricconducter(PEC).Thespaceishomogeneous.
8、Wedesigntwokindsofonedimensionalphaseprofileswichcanmanipulatewavefr
