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1、PHYSICALREVIEWB84,045310(2011)Surfaceplasmonsinametalnanowirecoupledtocolloidalquantumdots:ScatteringpropertiesandquantumentanglementGuang-YinChen,1,2NeillLambert,2Chung-HsienChou,1Yueh-NanChen,1,*andFrancoNori2,31DepartmentofPhysicsandNationalCenterforT
2、heoreticalSciences,NationalCheng-KungUniversity,Tainan701,Taiwan2AdvancedScienceInstitute,RIKEN,Wako-shi,Saitama351-0198,Japan3PhysicsDepartment,UniversityofMichigan,AnnArbor,Michigan48109-1040,USA(Received10February2011;revisedmanuscriptreceived6April20
3、11;published13July2011)Weinvestigatecoherentsinglesurface-plasmontransportinametalnanowirestronglycoupledtotwocolloidalquantumdots.Analyticalexpressionsareobtainedforthetransmissionandre?ectioncoef?cientsbysolvingthecorrespondingeigenvalueequation.Remote
4、entanglementofthewavefunctionsofthetwoquantumdotscanbecreatediftheinterdotdistanceisequaltoamultiplehalf-wavelengthofthesurfaceplasmon.Furthermore,byapplyingclassicallaserpulsestothequantumdots,theentangledstatescanbestoredinmetastablestatesthataredecoup
5、ledfromthesurfaceplasmons.DOI:10.1103/PhysRevB.84.045310PACSnumber(s):03.67.Bg,42.50.Ex,73.20.Mf,73.21.LaI.INTRODUCTIONplasmonsinmetallicnanowirescoupledtoQDs.23Weuseareal-spaceHamiltonian24totreatthecoherentsurface-plasmonColloidalquantumdots(QDs)are?uo
6、rescentcore-shelltransportinthewirecoupledtotwodots.Thetransmissionsemiconductornanocrystalswithtunableluminescenceprop-andre?ectionspectraofSPsforbothsingleQDanddoubleerties(e.g.,broadexcitationspectra,narrowemissionspectra,QDscasesinthenonlinearquadrat
7、ic-dispersionregime(whichandsize-dependentemission),whichhaverecentlyattracted1occursnearthevicinityofthebandedge)hasbeenstudiedinmuchattentionfortheirabilitytoactasphotondetectors.ourpreviouswork.25InthatworkthescatteringspectrarevealsWhenalightwavestri
8、kesametalsurface,itcanexciteaFanoresonanceduetotheinterferencebetweenlocalizedandasurface-plasmonpolariton:asurfaceelectromagneticwavedelocalizedSPchannels.Here,wefocusonadifferentgoalcoupledtoplasmaoscillations.Recently,t
