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1、Asubwavelengthcoupler-typeMIMopticalfilterQinZhang,Xu-GuangHuang*,Xian-ShiLin,JinTao,andXiao-PingJinLaboratoryofPhotonicInformationTechnology,SouthChinaNormalUniversityGuangzhou,510006,China*huangxg@scnu.edu.cnAbstract:Anovelsubwavelengthsurfaceplasmo
2、npolaritonsopticalfilterbasedonanincompletelydirectionalcouplerisproposedandnumericallysimulatedbyusingthefinitedifferencetimedomainmethodwithperfectlymatchedlayerabsorbingboundarycondition.Ananalyticalsolutionfortheresonantconditionofthestructureisde
3、rivedbymeansofthecavitytheory.Bothanalyticalandsimulativeresultsrevealthattheresonantwavelengthsareproportionaltothelengthoftheslitsegment,inverselyproportionaltotheantinodenumberofastandingwaveinthesegment,andarerelatedtotheslitwidthandthegapbetweent
4、hetwoslits.Theanalyticalsolutionbeingconsistentwiththenumericalsimulationverifiesthefeasibilityoftheconceptofthenewfilterstructure.©2009OpticalSocietyofAmericaOCIScodes:(240.6680)Surfaceplasmons;(230.4555)Coupledresonators;(130.7408)Wavelengthfilterin
5、g;(130.3120)Integratedopticsdevices;Referencesandlinks1.H.Raether,SurfacePlasmononSmoothandRoughSurfacesandonGratings(Springer-Verlag,Berlin,Germany,1988).2.L.Liu,Z.Han,andS.He,“Novelsurfaceplasmonwaveguideforhighintegration,”Opt.Express13(17),6645–66
6、50(2005).3.G.Veronis,andS.Fan,“Bendsandsplittersinmetal-dielectric-metalsubwavelengthplasmonicwaveguides,”Appl.Phys.Lett.87(13),131102(2005).4.T.Lee,andS.Gray,“Subwavelengthlightbendingbymetalslitstructures,”Opt.Express13(24),9652–9659(2005).5.H.Gao,H
7、.Shi,C.Wang,C.Du,X.Luo,Q.Deng,Y.Lv,X.Lin,andH.Yao,“SurfaceplasmonpolaritonpropagationandcombinationinY-shapedmetallicchannels,”Opt.Express13(26),10795(2005).6.T.Nikolajsen,K.Leosson,andS.I.Bozhevolnyia,“Surfaceplasmonpolaritonbasedmodulatorsandswitche
8、soperatingattelecomwavelengths,”Appl.Phys.Lett.85(24),5833(2004).7.H.Zhao,X.Guang,andJ.Huang,“Novelopticaldirectionalcouplerbasedonsurfaceplasmonpolaritons,”PhysicaE40(10),3025–3029(2008).8.B.Wang,andG.Wang,“PlasmonBraggreflectorsandnanocaviti
