Photoluminescence modification by a high-order photonic band with abnormal dispersion in ZnO inverse opal英文文献资料

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1、PHYSICALREVIEWB77,115136
2008Photoluminescencemodificationbyahigh-orderphotonicbandwithabnormaldispersioninZnOinverseopalHeesoNoh,MichaelScharrer,MarkA.Anderson,RobertP.H.Chang,andHuiCaoMaterialsResearchInstitute,NorthwesternUniversity,Evanston,Illinois6

2、0208,USA
Received25October2007;revisedmanuscriptreceived17January2008;published27March2008Wemeasuredtheangle-andpolarization-resolvedreßectionandphotoluminescencespectraofZnOinverseopals.SigniÞcantenhancementofspontaneousemissionisobserved.Theenhancedem

3、issionnotonlyhasgooddirectionalitybutcanalsobelinearlypolarized.Adetailedtheoreticalanalysisandnumericalsimulationrevealthatsuchenhancementiscausedbytheabnormaldispersionofahigh-orderphotonicband.Thefrozenmodeatastationaryinßectionpointofadispersioncurve

4、canstronglymodifytheintensity,directionality,andpolarizationofspontaneousemission.DOI:10.1103/PhysRevB.77.115136PACSnumber
s:42.70.Qs,42.25.Fx,78.55.
m,78.40.
qI.INTRODUCTIONefÞciencyofincidentlightintotheslowmodeisverylow.Tosolvethisproblem,FigotinandV

5、itebskiyproposedtousePhotoniccrystals
PhCshavebeenextensivelystudiedthephotonicmodeatthestationaryinßectionpointofadis-forcontrolofspontaneousemission.TheÞrstproposalbypersioncurveofaphotonicband.46,47SuchamodehasbothYablonovitch1in1987utilizedacomplete

6、photonicbandgapd/dk0andd2/dk20.Itiscalledafrozenmode.
PBGinathree-dimensional
3DPhC,whichwasrealizedWhentheincidentlightisinresonancewithafrozenmode,in2004byOgawaetal.2Comparedtoone-dimensionalandthevanishinggroupvelocityisoffsetbythedivergingelec-

7、two-dimensionalPhCs,the3DPhChastheutmostcontroloftromagneticenergydensity.TheenergyßuxinsidethePhCislight-matterinteractions.However,itismuchmoredifÞcultÞniteandcomparabletotheincidentßux.Hence,theinci-tofabricate3DPhCs,especiallywiththetop-downap-dentli

8、ghtcanbecompletelyconvertedtothefrozenmodeproach.Analternativeapproachbasedonself-assemblyat-insteadofbeingreßected.Ouraimistoemploytheuniquetractsmuchattentionduetoeaseoffabrication.Suchapropertiesofafrozenmodeina3DPhCtot