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1、Photoniccrystalstructuresinion-slicedlithiumniobatethinfilmsFrederikSulser,GorazdPoberaj,ManuelKoechlin,andPeterGunter¨NonlinearOpticsLaboratory,InstituteofQuantumElectronics,ETHZurich,8093Zurich,Switzerlandnlo@phys.ethz.chAbstract:Wereportonthefirstrealizationofphotoniccrystalstructuresin600-nmthi
2、ckion-sliced,single-crystallinelithiumniobatethinfilmsbondedonalithiumniobatesubstrateusingadhesivepolymerbenzocyclobutene(BCB).Focusedionbeam(FIB)millingisusedforfastprototypingofphotoniccrystalstructureswithregularcylindricalholes.Unwantedredepositioneffectsleadingtoconicallyshapedholesinlithium
3、niobateareminimizedduetothesoftBCBlayerunderneath.Ahighrefractiveindexcontrastof0.65betweenthelithiumniobatethinfilmandtheBCBunderlayerenablesstronglightconfinementintheverticaldirection.ForTEpolarizedlightatriangularphotoniccrystallatticeofairholeswithadiameterof240nmandaseparationof500nmhasaphoto
4、nicbandgapinthewavelengthrangefrom1390to1500nm.ExperimentallymeasuredtransmissionspectrashowaspectralpowerdipfortheΓKdirectionofthereciprocallatticewithanextinctionratioofupto15dB.Thisisingoodagreementwithnumericalsimulationsbasedonthethree-dimensionalplanewaveexpansion(PWE)andthefinite-difference
5、time-domain(FDTD)method.©2009OpticalSocietyofAmericaOCIScodes:(130.3730)Lithiumniobate;(160.5298)Photoniccrystals;(250.5300)Photonicintegratedcircuits;(310.6845)Thinfilmdevicesandapplications.Referencesandlinks1.J.D.Joannopoulos,S.G.Johnson,J.N.Winn,R.D.Meade,“PhotonicCrystals:MoldingtheFlowofLigh
6、t,”PrincetonUniversityPress2ndEdition(2008).2.Y.Akahane,T.Asano,B.S.Song,S.Noda,“High-Qphotonicnanocavityinatwo-dimensionalphotoniccrystal,”Nature425,944-947(2003).3.V.R.Almeida,C.A.Barrios,R.R.Panepucci,M.Lipson,“All-opticalcontroloflightonasiliconchip,”Nature431,1081-1084(2004).4.F.Lacour,N.Cou
7、rjal,M.-P.Bernal,A.Sabac,C.Bainier,M.Spajer,“Nanostructuringlithiumniobatesubstratesbyfocusedionbeammilling,”Opt.Mater.27,1421-1425(2005).5.M.Roussey,M.-P.Bernal,N.Courjal,andF.I.Baida,“Experimentalandtheoreticalcharac
