Pyroelectricity and Optical Second Harmonic Generation in Polyvinylidene Fluoride Films.pdf

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1、PYROELECTRICITYANDOPTICALSECONDHARMONICGENERATIONINPOLYVINYLIDENEFLUORIDEFILMSJ.G.Bergman,J.H.McFee,andG.R.CraneCitation:Appl.Phys.Lett.18,203(1971);doi:10.1063/1.1653624Viewonline:http://dx.doi.org/10.1063/1.1653624ViewTableofContents:http://apl.aip.org/resource/1/APPLAB/v

2、18/i5PublishedbytheAmericanInstituteofPhysics.AdditionalinformationonAppl.Phys.Lett.JournalHomepage:http://apl.aip.org/JournalInformation:http://apl.aip.org/about/about_the_journalTopdownloads:http://apl.aip.org/features/most_downloadedInformationforAuthors:http://apl.aip.o

3、rg/authorsDownloaded19Sep2012to134.214.184.143.RedistributionsubjecttoAIPlicenseorcopyright;seehttp://apl.aip.org/about/rights_and_permissionsAPPLIEDPHYSICSLETTERSVOLUME18,NUMBER51MARCH1971PYROELECTRICITYANDOPTICALSECONDHARMONICGENERATIONINPOLYVINYLIDENEFLUORIDEFILMSJ.G.Ber

4、gman,Jr.,J.H.McFee,andG.R.CraneBellTelephoneLaboratories,Holmdel,NewJersey07733(Received10November1970)Orientedfilmsofpolyvinylidenefluoride[(CH2CF2).I.apolarpolymerpossessingsymmetrymm2,canbemadesignificantlypyroelectricandopticallynonlinearbypolinginanelectricfield.Apyroe

5、lectriccoefficient(dP/dT=2.4±0.7nC/cm2oC)comparabletothatofsingle•crystalLiNb03isobserved.Thenonlinearopticalcoefficientsd33•d32•andd3!ofpolyvinyli•denefluoride(PVF2)aremeasuredrelativetoduofcrystallinequartz[d33(PVF2)"'2d3!(PVF2)'"du(Si02);d32(PVF2)"'0).Thepoledfilmshavesp

6、ecificadvantagesforpyroelectricdetectionofelectromagneticradiationandforopticalparametricdevices.Polyvinylidenefluoride(PVFa)isahighlycrys•andlargestindices,respectively.Thecorrelationtallinepolymer[(CHaCFa).]belongingtotheacen•betweenobservedopticalanisotropyandfilmpre•tri

7、cpolargroupmm2.l,aKawaiahasrecentlyshownparation(uniaxialversusbiaxialstretChing)isthatpiezoelectricitycanbepermanentlyinducedevident.ThebirefringencesinTableIrefertoinstretchedPVFafilmsbyheatingthefilmstothefilmsasreceivedfromthemanufacturer.We-100DCandthenallowingthemtoco

8、olinastrongsubjectedthemtonoadditionalstretching.Fur•electricfield(-300kV/cm).Weha