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1、J.Cent.SouthUniv.(2015)22:2020−2026DOI:10.1007/s11771-015-2724-2Formationmechanismandmodulationofelectromagneticallyinducedtransparency-liketransmissioninside-coupledstructures11,21YANGHui(杨辉),LIHong-jian(李宏建),XUXiu-ke(许秀科),111HEZhi-hui(何智慧),WANGYun(王云),XUGuo-jun(徐国均)1.SchoolofPhysicsandEl
2、ectronics,CentralSouthUniversity,Changsha410083,China;2.SchoolofMaterialsScienceandEngineering,CentralSouthUniversity,Changsha410083,China©CentralSouthUniversityPressandSpringer-VerlagBerlinHeidelberg2015Abstract:BasedonFabrymodelandfinite-differenttime-domain(FDTD)method,theplasmonicstruc
3、turecomposedofametal-insulator-metal(MIM)buswaveguideandaside-coupledresonatorwasinvestigated.Itisfoundthatthetransmissionfeaturescanberegulatedbythecavitywidthandcouplingdistance.Electromagneticallyinducedtransparency(EIT)-liketransmissioncanbeexcitedbyaddinganidenticalresonatoronthepre-e
4、xistingstructure.Combiningtheforegoingtheoreticalanalysiswithcoupledmodetheory(CMT),theformationprocessoftheEIT-liketransmissionwasdetailedlyanalyzed.EIT-liketransmissioncanalsobeexcitedinplasmonicstructurewithtwodetunedresonators.Byalteringthestructureparameters,thetransparencywindowcanbe
5、purposefullymodulated.Withthemeritsofcompactstructureandsimplicityinfabrication,theproposedstructuresmayhaveabroadprospectofapplicationsinhighlyintegratedopticalcircuits.Keywords:metal-insulator-metal(MIM)waveguide;side-coupledresonator;electromagneticallyinducedtranspareucy(EIT)-liketrans
6、mission;formationmechanismphase-coupledplasmon-inducedtransparency[10−11],1IntroductionEIT-likeeffectinsplit-ringresonators[12−13],andcoupledstuborresonators[14−16].AmongthesevariousElectromagneticallyinducedtransparency(EIT)plasmonicdevices,metal-insulator-metal(MIM)referstotheformationof
7、anarrowtransparencywindowwaveguideshaveattractedconsiderableattentionduetoinsideoriginalwideabsorptionbandduetothequantumthesimplicityinfabricationandparticularlystronginterferencebetweentheatomiclevels[1−2].Recently,confinementoflight[11−18].GUOetal[13]introd
