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1、MaterialsLetters60(2006)485–489www.elsevier.com/locate/matletPhotochromicdiarylethenesforthree-wavelengthopticalmemoryShouzhiPua,b,⁎,FushiZhangb,JingkunXua,LiangShena,aaQiangXiao,BingChenaJiangxiKeyLabofOrganicChemistry,JiangxiScienceandTechnologyNormalUniversity,Nanchang330013,ChinabDepartmentof
2、Chemistry,TsinghuaUniversity,Beijing100084,ChinaReceived27February2005;accepted14September2005Availableonline3October2005AbstractForthefirsttime,wecarriedoutsuccessfullythree-wavelengthphoton-modeopticalstorageusingphotochromicdiarylethenematerials,1,2-bis(2-methyl-5-hydroxymethyl-thien-3-yl)perf
3、luorocyclopentene(1a),1,2-bis(2-methyl-5-(4-N,N-dimethylaminophenyl)-thien-3-yl)perfluor-ocyclopentene(2a)and1,2-bis(2-methyl-5-(2,2′-dicyanovinyl)-thien-3-yl)perfluorocyclopentene(3a),asrecordingmedium.Threelaserbeamsof532,650and780nmwereusedinrecordingandreadoutsimultaneously,andsignalswithhigh
4、S/Nratiowereobtained.Theresultsshowedthatthethreediaryletheneshadrespondedrapidlyuponirradiationofthecorrespondingwavelengthlaser.Especiallytherewasnocrosstalkexistingineachoneofthem.ThedestructionofthereadoutandthephotochromicpropertiesofthethreediarylethenesinPMMAfilmswerealsoinvestigated.©2005
5、ElsevierB.V.Allrightsreserved.Keywords:Diarylethenes;Photochromism;Three-wavelengthopticalmemory1.IntroductionArecordingmediumwhichcontainsphotochromicmaterialswithdifferentabsorptionbandscouldbeusedforthemulti-Nowadays,thedevelopingtendencyofopticalstorageishighwavelengthopticalstorage[3].Eachph
6、otochromicmaterialwasmemorydensity,largestoragecapacity,highdataprocess/transferrecordedindependentlybythecorrespondingwavelengthlaser,rateandenvironmentallyconscioustechnology[1,2].Manyandtherecordedinformationwasreadoutbythesameapproacheshavebeenmadetoincreasetherecordingdensityofwavelengthlase
7、rofrecording.Oneofthemostpromisingopticalmemorybecauseofevergrowingdemandsforhighspeedphotochromiccandidatesforrewritablephoton-modeopticalandlargedatacapacitycomputing,aswellasforhigh-qualityvideorecording.Multi-wavel
