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1、Slowlightinadielectricwaveguidewithnegative-refractive-indexphotoniccrystalcladding1212,*JinlongHe,YiJin,ZhiHong,andSailingHe1CentreforTHzResearch,CollegeofMechanicalandElectricalEngineering,ChinaJiliangUniversity,Hangzhou310018,China2CentreforOpticalandElectromagneticRe
2、search,ZhejiangUniversity,Hangzhou310058,China;JointResearchCentreofPhotonicsoftheRoyalInstituteofTechnology(Sweden)andZhejiangUniversity*Correspondingauthor:sailing@kth.seAbstract:Aslowlightwaveguidemadeofadielectricslabinsertedinatwo-dimensionalphotoniccrystalwithanega
3、tiveeffectiverefractiveindexisproposedandnumericallystudied.Thewaveguidemaypossessmodeswithzerogroupvelocity,anditsfrequencyvarieswiththethicknessofthewaveguide.Alinearlytaperedleft-handedphotoniccrystalwaveguideisalsoproposedandstudied.Itisshownthattheso-called‘trappedr
4、ainbow’proposedbyTsakmakidis,Boardman,andHess[1]isdifficulttorealizeduetoacouplingofforward-andbackward-propagatingmodesnearzerogroupvelocity.However,differentfrequencycomponentsofabroadbandexcitationcanstillbeseparatedthroughpartialaccumulationatwaveguidesectionsofdiffe
5、rentthicknesses.©2008OpticalSocietyofAmericaOCIScodes:(260.2110)Physicaloptics;(230.7400)Waveguides,slab;(130.2790)GuidedwavesReferencesandlinks1.K.L.Tsakmakidis,A.D.Boardman,andO.Hess,“‘Trappedrainbow’storageoflightinmetamaterials,”Nature50,397–401(2007).2.M.D.Lukin,and
6、A.Imamoglu,“Controllingphotonsusingelectromagneticallyinducedtransparency,”Nature413,273-276(2001).3.A.Melloni,F.Morichetti,andM.Martinelli,“Opticalslowwavestructures,”Opt.PhotonicsNews14,44–48(2003).4.H.Gersen,T.J.Karle,R.J.P.Engelen,W.Bogaerts,J.P.Korterik,N.F.vanHulst
7、,T.F.KraussandL.Kuipers,“Real-spaceobservationofultraslowlightinPhotonicCrystalWaveguides,”Phys.Rev.Lett.94,073903(2005).5.D.MoriandT.Baba,“Dispersion-controlledopticalgroupdelaydevicebychirpedphotoniccrystalwaveguides,”Appl.Phys.Lett.85,1101(2004).6.Y.A.Vlasov,M.O'Boyle
8、,H.F.HamannandS.J.McNab,“Activecontrolofslowlightonachipwithphotoniccrystalwaveguides,”Nature438,65-69(
